sqlglot.dialects.duckdb API documentation

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# sqlglot.dialects.duckdb

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      1from __future__ import annotations
      2
      3import typing as t
      4
      5from sqlglot import exp, generator, parser, tokens, transforms
      6from sqlglot.dialects.dialect import (
      7    Dialect,
      8    NormalizationStrategy,
      9    approx_count_distinct_sql,
     10    arg_max_or_min_no_count,
     11    arrow_json_extract_sql,
     12    binary_from_function,
     13    bool_xor_sql,
     14    date_trunc_to_time,
     15    datestrtodate_sql,
     16    encode_decode_sql,
     17    build_formatted_time,
     18    inline_array_sql,
     19    no_comment_column_constraint_sql,
     20    no_safe_divide_sql,
     21    no_timestamp_sql,
     22    pivot_column_names,
     23    regexp_extract_sql,
     24    rename_func,
     25    str_position_sql,
     26    str_to_time_sql,
     27    timestamptrunc_sql,
     28    timestrtotime_sql,
     29)
     30from sqlglot.helper import flatten, seq_get
     31from sqlglot.tokens import TokenType
     32
     33
     34def _ts_or_ds_add_sql(self: DuckDB.Generator, expression: exp.TsOrDsAdd) -> str:
     35    this = self.sql(expression, "this")
     36    unit = self.sql(expression, "unit").strip("'") or "DAY"
     37    interval = self.sql(exp.Interval(this=expression.expression, unit=unit))
     38    return f"CAST({this} AS {self.sql(expression.return_type)}) + {interval}"
     39
     40
     41def _date_delta_sql(self: DuckDB.Generator, expression: exp.DateAdd | exp.DateSub) -> str:
     42    this = self.sql(expression, "this")
     43    unit = self.sql(expression, "unit").strip("'") or "DAY"
     44    op = "+" if isinstance(expression, exp.DateAdd) else "-"
     45    return f"{this} {op} {self.sql(exp.Interval(this=expression.expression, unit=unit))}"
     46
     47
     48# BigQuery -> DuckDB conversion for the DATE function
     49def _date_sql(self: DuckDB.Generator, expression: exp.Date) -> str:
     50    result = f"CAST({self.sql(expression, 'this')} AS DATE)"
     51    zone = self.sql(expression, "zone")
     52
     53    if zone:
     54        date_str = self.func("STRFTIME", result, "'%d/%m/%Y'")
     55        date_str = f"{date_str} || ' ' || {zone}"
     56
     57        # This will create a TIMESTAMP with time zone information
     58        result = self.func("STRPTIME", date_str, "'%d/%m/%Y %Z'")
     59
     60    return result
     61
     62
     63def _array_sort_sql(self: DuckDB.Generator, expression: exp.ArraySort) -> str:
     64    if expression.expression:
     65        self.unsupported("DuckDB ARRAY_SORT does not support a comparator")
     66    return self.func("ARRAY_SORT", expression.this)
     67
     68
     69def _sort_array_sql(self: DuckDB.Generator, expression: exp.SortArray) -> str:
     70    name = "ARRAY_REVERSE_SORT" if expression.args.get("asc") == exp.false() else "ARRAY_SORT"
     71    return self.func(name, expression.this)
     72
     73
     74def _build_sort_array_desc(args: t.List) -> exp.Expression:
     75    return exp.SortArray(this=seq_get(args, 0), asc=exp.false())
     76
     77
     78def _build_date_diff(args: t.List) -> exp.Expression:
     79    return exp.DateDiff(this=seq_get(args, 2), expression=seq_get(args, 1), unit=seq_get(args, 0))
     80
     81
     82def _build_generate_series(end_exclusive: bool = False) -> t.Callable[[t.List], exp.GenerateSeries]:
     83    def _builder(args: t.List) -> exp.GenerateSeries:
     84        # Check https://duckdb.org/docs/sql/functions/nested.html#range-functions
     85        if len(args) == 1:
     86            # DuckDB uses 0 as a default for the series' start when it's omitted
     87            args.insert(0, exp.Literal.number("0"))
     88
     89        gen_series = exp.GenerateSeries.from_arg_list(args)
     90        gen_series.set("is_end_exclusive", end_exclusive)
     91
     92        return gen_series
     93
     94    return _builder
     95
     96
     97def _build_make_timestamp(args: t.List) -> exp.Expression:
     98    if len(args) == 1:
     99        return exp.UnixToTime(this=seq_get(args, 0), scale=exp.UnixToTime.MICROS)
    100
    101    return exp.TimestampFromParts(
    102        year=seq_get(args, 0),
    103        month=seq_get(args, 1),
    104        day=seq_get(args, 2),
    105        hour=seq_get(args, 3),
    106        min=seq_get(args, 4),
    107        sec=seq_get(args, 5),
    108    )
    109
    110
    111def _struct_sql(self: DuckDB.Generator, expression: exp.Struct) -> str:
    112    args: t.List[str] = []
    113    for i, expr in enumerate(expression.expressions):
    114        if isinstance(expr, exp.PropertyEQ):
    115            key = expr.name
    116            value = expr.expression
    117        else:
    118            key = f"_{i}"
    119            value = expr
    120
    121        args.append(f"{self.sql(exp.Literal.string(key))}: {self.sql(value)}")
    122
    123    return f"{{{', '.join(args)}}}"
    124
    125
    126def _datatype_sql(self: DuckDB.Generator, expression: exp.DataType) -> str:
    127    if expression.is_type("array"):
    128        return f"{self.expressions(expression, flat=True)}[]"
    129
    130    # Type TIMESTAMP / TIME WITH TIME ZONE does not support any modifiers
    131    if expression.is_type("timestamptz", "timetz"):
    132        return expression.this.value
    133
    134    return self.datatype_sql(expression)
    135
    136
    137def _json_format_sql(self: DuckDB.Generator, expression: exp.JSONFormat) -> str:
    138    sql = self.func("TO_JSON", expression.this, expression.args.get("options"))
    139    return f"CAST({sql} AS TEXT)"
    140
    141
    142def _unix_to_time_sql(self: DuckDB.Generator, expression: exp.UnixToTime) -> str:
    143    scale = expression.args.get("scale")
    144    timestamp = expression.this
    145
    146    if scale in (None, exp.UnixToTime.SECONDS):
    147        return self.func("TO_TIMESTAMP", timestamp)
    148    if scale == exp.UnixToTime.MILLIS:
    149        return self.func("EPOCH_MS", timestamp)
    150    if scale == exp.UnixToTime.MICROS:
    151        return self.func("MAKE_TIMESTAMP", timestamp)
    152
    153    return self.func("TO_TIMESTAMP", exp.Div(this=timestamp, expression=exp.func("POW", 10, scale)))
    154
    155
    156def _rename_unless_within_group(
    157    a: str, b: str
    158) -> t.Callable[[DuckDB.Generator, exp.Expression], str]:
    159    return lambda self, expression: (
    160        self.func(a, *flatten(expression.args.values()))
    161        if isinstance(expression.find_ancestor(exp.Select, exp.WithinGroup), exp.WithinGroup)
    162        else self.func(b, *flatten(expression.args.values()))
    163    )
    164
    165
    166class DuckDB(Dialect):
    167    NULL_ORDERING = "nulls_are_last"
    168    SUPPORTS_USER_DEFINED_TYPES = False
    169    SAFE_DIVISION = True
    170    INDEX_OFFSET = 1
    171    CONCAT_COALESCE = True
    172
    173    # https://duckdb.org/docs/sql/introduction.html#creating-a-new-table
    174    NORMALIZATION_STRATEGY = NormalizationStrategy.CASE_INSENSITIVE
    175
    176    def to_json_path(self, path: t.Optional[exp.Expression]) -> t.Optional[exp.Expression]:
    177        if isinstance(path, exp.Literal):
    178            # DuckDB also supports the JSON pointer syntax, where every path starts with a `/`.
    179            # Additionally, it allows accessing the back of lists using the `[#-i]` syntax.
    180            # This check ensures we'll avoid trying to parse these as JSON paths, which can
    181            # either result in a noisy warning or in an invalid representation of the path.
    182            path_text = path.name
    183            if path_text.startswith("/") or "[#" in path_text:
    184                return path
    185
    186        return super().to_json_path(path)
    187
    188    class Tokenizer(tokens.Tokenizer):
    189        KEYWORDS = {
    190            **tokens.Tokenizer.KEYWORDS,
    191            "//": TokenType.DIV,
    192            "ATTACH": TokenType.COMMAND,
    193            "BINARY": TokenType.VARBINARY,
    194            "BITSTRING": TokenType.BIT,
    195            "BPCHAR": TokenType.TEXT,
    196            "CHAR": TokenType.TEXT,
    197            "CHARACTER VARYING": TokenType.TEXT,
    198            "EXCLUDE": TokenType.EXCEPT,
    199            "LOGICAL": TokenType.BOOLEAN,
    200            "ONLY": TokenType.ONLY,
    201            "PIVOT_WIDER": TokenType.PIVOT,
    202            "SIGNED": TokenType.INT,
    203            "STRING": TokenType.VARCHAR,
    204            "UBIGINT": TokenType.UBIGINT,
    205            "UINTEGER": TokenType.UINT,
    206            "USMALLINT": TokenType.USMALLINT,
    207            "UTINYINT": TokenType.UTINYINT,
    208            "TIMESTAMP_S": TokenType.TIMESTAMP_S,
    209            "TIMESTAMP_MS": TokenType.TIMESTAMP_MS,
    210            "TIMESTAMP_NS": TokenType.TIMESTAMP_NS,
    211            "TIMESTAMP_US": TokenType.TIMESTAMP,
    212        }
    213
    214        SINGLE_TOKENS = {
    215            **tokens.Tokenizer.SINGLE_TOKENS,
    216            "$": TokenType.PARAMETER,
    217        }
    218
    219    class Parser(parser.Parser):
    220        BITWISE = {
    221            **parser.Parser.BITWISE,
    222            TokenType.TILDA: exp.RegexpLike,
    223        }
    224
    225        FUNCTIONS_WITH_ALIASED_ARGS = {*parser.Parser.FUNCTIONS_WITH_ALIASED_ARGS, "STRUCT_PACK"}
    226
    227        FUNCTIONS = {
    228            **parser.Parser.FUNCTIONS,
    229            "ARRAY_HAS": exp.ArrayContains.from_arg_list,
    230            "ARRAY_SORT": exp.SortArray.from_arg_list,
    231            "ARRAY_REVERSE_SORT": _build_sort_array_desc,
    232            "DATEDIFF": _build_date_diff,
    233            "DATE_DIFF": _build_date_diff,
    234            "DATE_TRUNC": date_trunc_to_time,
    235            "DATETRUNC": date_trunc_to_time,
    236            "DECODE": lambda args: exp.Decode(
    237                this=seq_get(args, 0), charset=exp.Literal.string("utf-8")
    238            ),
    239            "ENCODE": lambda args: exp.Encode(
    240                this=seq_get(args, 0), charset=exp.Literal.string("utf-8")
    241            ),
    242            "EPOCH": exp.TimeToUnix.from_arg_list,
    243            "EPOCH_MS": lambda args: exp.UnixToTime(
    244                this=seq_get(args, 0), scale=exp.UnixToTime.MILLIS
    245            ),
    246            "JSON": exp.ParseJSON.from_arg_list,
    247            "JSON_EXTRACT_PATH": parser.build_extract_json_with_path(exp.JSONExtract),
    248            "JSON_EXTRACT_STRING": parser.build_extract_json_with_path(exp.JSONExtractScalar),
    249            "LIST_HAS": exp.ArrayContains.from_arg_list,
    250            "LIST_REVERSE_SORT": _build_sort_array_desc,
    251            "LIST_SORT": exp.SortArray.from_arg_list,
    252            "LIST_VALUE": exp.Array.from_arg_list,
    253            "MAKE_TIME": exp.TimeFromParts.from_arg_list,
    254            "MAKE_TIMESTAMP": _build_make_timestamp,
    255            "MEDIAN": lambda args: exp.PercentileCont(
    256                this=seq_get(args, 0), expression=exp.Literal.number(0.5)
    257            ),
    258            "QUANTILE_CONT": exp.PercentileCont.from_arg_list,
    259            "QUANTILE_DISC": exp.PercentileDisc.from_arg_list,
    260            "REGEXP_EXTRACT": lambda args: exp.RegexpExtract(
    261                this=seq_get(args, 0), expression=seq_get(args, 1), group=seq_get(args, 2)
    262            ),
    263            "REGEXP_MATCHES": exp.RegexpLike.from_arg_list,
    264            "REGEXP_REPLACE": lambda args: exp.RegexpReplace(
    265                this=seq_get(args, 0),
    266                expression=seq_get(args, 1),
    267                replacement=seq_get(args, 2),
    268                modifiers=seq_get(args, 3),
    269            ),
    270            "STRFTIME": build_formatted_time(exp.TimeToStr, "duckdb"),
    271            "STRING_SPLIT": exp.Split.from_arg_list,
    272            "STRING_SPLIT_REGEX": exp.RegexpSplit.from_arg_list,
    273            "STRING_TO_ARRAY": exp.Split.from_arg_list,
    274            "STRPTIME": build_formatted_time(exp.StrToTime, "duckdb"),
    275            "STRUCT_PACK": exp.Struct.from_arg_list,
    276            "STR_SPLIT": exp.Split.from_arg_list,
    277            "STR_SPLIT_REGEX": exp.RegexpSplit.from_arg_list,
    278            "TO_TIMESTAMP": exp.UnixToTime.from_arg_list,
    279            "UNNEST": exp.Explode.from_arg_list,
    280            "XOR": binary_from_function(exp.BitwiseXor),
    281            "GENERATE_SERIES": _build_generate_series(),
    282            "RANGE": _build_generate_series(end_exclusive=True),
    283        }
    284
    285        FUNCTION_PARSERS = parser.Parser.FUNCTION_PARSERS.copy()
    286        FUNCTION_PARSERS.pop("DECODE")
    287
    288        TABLE_ALIAS_TOKENS = parser.Parser.TABLE_ALIAS_TOKENS - {
    289            TokenType.SEMI,
    290            TokenType.ANTI,
    291        }
    292
    293        PLACEHOLDER_PARSERS = {
    294            **parser.Parser.PLACEHOLDER_PARSERS,
    295            TokenType.PARAMETER: lambda self: (
    296                self.expression(exp.Placeholder, this=self._prev.text)
    297                if self._match(TokenType.NUMBER) or self._match_set(self.ID_VAR_TOKENS)
    298                else None
    299            ),
    300        }
    301
    302        def _parse_types(
    303            self, check_func: bool = False, schema: bool = False, allow_identifiers: bool = True
    304        ) -> t.Optional[exp.Expression]:
    305            this = super()._parse_types(
    306                check_func=check_func, schema=schema, allow_identifiers=allow_identifiers
    307            )
    308
    309            # DuckDB treats NUMERIC and DECIMAL without precision as DECIMAL(18, 3)
    310            # See: https://duckdb.org/docs/sql/data_types/numeric
    311            if (
    312                isinstance(this, exp.DataType)
    313                and this.is_type("numeric", "decimal")
    314                and not this.expressions
    315            ):
    316                return exp.DataType.build("DECIMAL(18, 3)")
    317
    318            return this
    319
    320        def _parse_struct_types(self, type_required: bool = False) -> t.Optional[exp.Expression]:
    321            return self._parse_field_def()
    322
    323        def _pivot_column_names(self, aggregations: t.List[exp.Expression]) -> t.List[str]:
    324            if len(aggregations) == 1:
    325                return super()._pivot_column_names(aggregations)
    326            return pivot_column_names(aggregations, dialect="duckdb")
    327
    328    class Generator(generator.Generator):
    329        PARAMETER_TOKEN = "$"
    330        NAMED_PLACEHOLDER_TOKEN = "$"
    331        JOIN_HINTS = False
    332        TABLE_HINTS = False
    333        QUERY_HINTS = False
    334        LIMIT_FETCH = "LIMIT"
    335        STRUCT_DELIMITER = ("(", ")")
    336        RENAME_TABLE_WITH_DB = False
    337        NVL2_SUPPORTED = False
    338        SEMI_ANTI_JOIN_WITH_SIDE = False
    339        TABLESAMPLE_KEYWORDS = "USING SAMPLE"
    340        TABLESAMPLE_SEED_KEYWORD = "REPEATABLE"
    341        LAST_DAY_SUPPORTS_DATE_PART = False
    342        JSON_KEY_VALUE_PAIR_SEP = ","
    343        IGNORE_NULLS_IN_FUNC = True
    344        JSON_PATH_BRACKETED_KEY_SUPPORTED = False
    345        SUPPORTS_CREATE_TABLE_LIKE = False
    346        MULTI_ARG_DISTINCT = False
    347        CAN_IMPLEMENT_ARRAY_ANY = True
    348
    349        TRANSFORMS = {
    350            **generator.Generator.TRANSFORMS,
    351            exp.ApproxDistinct: approx_count_distinct_sql,
    352            exp.Array: lambda self, e: (
    353                self.func("ARRAY", e.expressions[0])
    354                if e.expressions and e.expressions[0].find(exp.Select)
    355                else inline_array_sql(self, e)
    356            ),
    357            exp.ArrayFilter: rename_func("LIST_FILTER"),
    358            exp.ArraySize: rename_func("ARRAY_LENGTH"),
    359            exp.ArgMax: arg_max_or_min_no_count("ARG_MAX"),
    360            exp.ArgMin: arg_max_or_min_no_count("ARG_MIN"),
    361            exp.ArraySort: _array_sort_sql,
    362            exp.ArraySum: rename_func("LIST_SUM"),
    363            exp.BitwiseXor: rename_func("XOR"),
    364            exp.CommentColumnConstraint: no_comment_column_constraint_sql,
    365            exp.CurrentDate: lambda *_: "CURRENT_DATE",
    366            exp.CurrentTime: lambda *_: "CURRENT_TIME",
    367            exp.CurrentTimestamp: lambda *_: "CURRENT_TIMESTAMP",
    368            exp.DayOfMonth: rename_func("DAYOFMONTH"),
    369            exp.DayOfWeek: rename_func("DAYOFWEEK"),
    370            exp.DayOfYear: rename_func("DAYOFYEAR"),
    371            exp.DataType: _datatype_sql,
    372            exp.Date: _date_sql,
    373            exp.DateAdd: _date_delta_sql,
    374            exp.DateFromParts: rename_func("MAKE_DATE"),
    375            exp.DateSub: _date_delta_sql,
    376            exp.DateDiff: lambda self, e: self.func(
    377                "DATE_DIFF", f"'{e.args.get('unit') or 'DAY'}'", e.expression, e.this
    378            ),
    379            exp.DateStrToDate: datestrtodate_sql,
    380            exp.DateToDi: lambda self,
    381            e: f"CAST(STRFTIME({self.sql(e, 'this')}, {DuckDB.DATEINT_FORMAT}) AS INT)",
    382            exp.Decode: lambda self, e: encode_decode_sql(self, e, "DECODE", replace=False),
    383            exp.DiToDate: lambda self,
    384            e: f"CAST(STRPTIME(CAST({self.sql(e, 'this')} AS TEXT), {DuckDB.DATEINT_FORMAT}) AS DATE)",
    385            exp.Encode: lambda self, e: encode_decode_sql(self, e, "ENCODE", replace=False),
    386            exp.Explode: rename_func("UNNEST"),
    387            exp.IntDiv: lambda self, e: self.binary(e, "//"),
    388            exp.IsInf: rename_func("ISINF"),
    389            exp.IsNan: rename_func("ISNAN"),
    390            exp.JSONExtract: arrow_json_extract_sql,
    391            exp.JSONExtractScalar: arrow_json_extract_sql,
    392            exp.JSONFormat: _json_format_sql,
    393            exp.LogicalOr: rename_func("BOOL_OR"),
    394            exp.LogicalAnd: rename_func("BOOL_AND"),
    395            exp.MonthsBetween: lambda self, e: self.func(
    396                "DATEDIFF",
    397                "'month'",
    398                exp.cast(e.expression, "timestamp", copy=True),
    399                exp.cast(e.this, "timestamp", copy=True),
    400            ),
    401            exp.ParseJSON: rename_func("JSON"),
    402            exp.PercentileCont: _rename_unless_within_group("PERCENTILE_CONT", "QUANTILE_CONT"),
    403            exp.PercentileDisc: _rename_unless_within_group("PERCENTILE_DISC", "QUANTILE_DISC"),
    404            # DuckDB doesn't allow qualified columns inside of PIVOT expressions.
    405            # See: https://github.com/duckdb/duckdb/blob/671faf92411182f81dce42ac43de8bfb05d9909e/src/planner/binder/tableref/bind_pivot.cpp#L61-L62
    406            exp.Pivot: transforms.preprocess([transforms.unqualify_columns]),
    407            exp.RegexpExtract: regexp_extract_sql,
    408            exp.RegexpReplace: lambda self, e: self.func(
    409                "REGEXP_REPLACE",
    410                e.this,
    411                e.expression,
    412                e.args.get("replacement"),
    413                e.args.get("modifiers"),
    414            ),
    415            exp.RegexpLike: rename_func("REGEXP_MATCHES"),
    416            exp.RegexpSplit: rename_func("STR_SPLIT_REGEX"),
    417            exp.Rand: rename_func("RANDOM"),
    418            exp.SafeDivide: no_safe_divide_sql,
    419            exp.Split: rename_func("STR_SPLIT"),
    420            exp.SortArray: _sort_array_sql,
    421            exp.StrPosition: str_position_sql,
    422            exp.StrToDate: lambda self, e: f"CAST({str_to_time_sql(self, e)} AS DATE)",
    423            exp.StrToTime: str_to_time_sql,
    424            exp.StrToUnix: lambda self, e: self.func(
    425                "EPOCH", self.func("STRPTIME", e.this, self.format_time(e))
    426            ),
    427            exp.Struct: _struct_sql,
    428            exp.Timestamp: no_timestamp_sql,
    429            exp.TimestampDiff: lambda self, e: self.func(
    430                "DATE_DIFF", exp.Literal.string(e.unit), e.expression, e.this
    431            ),
    432            exp.TimestampTrunc: timestamptrunc_sql,
    433            exp.TimeStrToDate: lambda self, e: self.sql(exp.cast(e.this, "date")),
    434            exp.TimeStrToTime: timestrtotime_sql,
    435            exp.TimeStrToUnix: lambda self, e: self.func("EPOCH", exp.cast(e.this, "timestamp")),
    436            exp.TimeToStr: lambda self, e: self.func("STRFTIME", e.this, self.format_time(e)),
    437            exp.TimeToUnix: rename_func("EPOCH"),
    438            exp.TsOrDiToDi: lambda self,
    439            e: f"CAST(SUBSTR(REPLACE(CAST({self.sql(e, 'this')} AS TEXT), '-', ''), 1, 8) AS INT)",
    440            exp.TsOrDsAdd: _ts_or_ds_add_sql,
    441            exp.TsOrDsDiff: lambda self, e: self.func(
    442                "DATE_DIFF",
    443                f"'{e.args.get('unit') or 'DAY'}'",
    444                exp.cast(e.expression, "TIMESTAMP"),
    445                exp.cast(e.this, "TIMESTAMP"),
    446            ),
    447            exp.UnixToStr: lambda self, e: self.func(
    448                "STRFTIME", self.func("TO_TIMESTAMP", e.this), self.format_time(e)
    449            ),
    450            exp.UnixToTime: _unix_to_time_sql,
    451            exp.UnixToTimeStr: lambda self, e: f"CAST(TO_TIMESTAMP({self.sql(e, 'this')}) AS TEXT)",
    452            exp.VariancePop: rename_func("VAR_POP"),
    453            exp.WeekOfYear: rename_func("WEEKOFYEAR"),
    454            exp.Xor: bool_xor_sql,
    455        }
    456
    457        SUPPORTED_JSON_PATH_PARTS = {
    458            exp.JSONPathKey,
    459            exp.JSONPathRoot,
    460            exp.JSONPathSubscript,
    461            exp.JSONPathWildcard,
    462        }
    463
    464        TYPE_MAPPING = {
    465            **generator.Generator.TYPE_MAPPING,
    466            exp.DataType.Type.BINARY: "BLOB",
    467            exp.DataType.Type.CHAR: "TEXT",
    468            exp.DataType.Type.FLOAT: "REAL",
    469            exp.DataType.Type.NCHAR: "TEXT",
    470            exp.DataType.Type.NVARCHAR: "TEXT",
    471            exp.DataType.Type.UINT: "UINTEGER",
    472            exp.DataType.Type.VARBINARY: "BLOB",
    473            exp.DataType.Type.VARCHAR: "TEXT",
    474            exp.DataType.Type.TIMESTAMP_S: "TIMESTAMP_S",
    475            exp.DataType.Type.TIMESTAMP_MS: "TIMESTAMP_MS",
    476            exp.DataType.Type.TIMESTAMP_NS: "TIMESTAMP_NS",
    477        }
    478
    479        STAR_MAPPING = {**generator.Generator.STAR_MAPPING, "except": "EXCLUDE"}
    480
    481        UNWRAPPED_INTERVAL_VALUES = (exp.Column, exp.Literal, exp.Paren)
    482
    483        # DuckDB doesn't generally support CREATE TABLE .. properties
    484        # https://duckdb.org/docs/sql/statements/create_table.html
    485        PROPERTIES_LOCATION = {
    486            prop: exp.Properties.Location.UNSUPPORTED
    487            for prop in generator.Generator.PROPERTIES_LOCATION
    488        }
    489
    490        # There are a few exceptions (e.g. temporary tables) which are supported or
    491        # can be transpiled to DuckDB, so we explicitly override them accordingly
    492        PROPERTIES_LOCATION[exp.LikeProperty] = exp.Properties.Location.POST_SCHEMA
    493        PROPERTIES_LOCATION[exp.TemporaryProperty] = exp.Properties.Location.POST_CREATE
    494
    495        def timefromparts_sql(self, expression: exp.TimeFromParts) -> str:
    496            nano = expression.args.get("nano")
    497            if nano is not None:
    498                expression.set(
    499                    "sec", expression.args["sec"] + nano.pop() / exp.Literal.number(1000000000.0)
    500                )
    501
    502            return rename_func("MAKE_TIME")(self, expression)
    503
    504        def timestampfromparts_sql(self, expression: exp.TimestampFromParts) -> str:
    505            sec = expression.args["sec"]
    506
    507            milli = expression.args.get("milli")
    508            if milli is not None:
    509                sec += milli.pop() / exp.Literal.number(1000.0)
    510
    511            nano = expression.args.get("nano")
    512            if nano is not None:
    513                sec += nano.pop() / exp.Literal.number(1000000000.0)
    514
    515            if milli or nano:
    516                expression.set("sec", sec)
    517
    518            return rename_func("MAKE_TIMESTAMP")(self, expression)
    519
    520        def tablesample_sql(
    521            self,
    522            expression: exp.TableSample,
    523            sep: str = " AS ",
    524            tablesample_keyword: t.Optional[str] = None,
    525        ) -> str:
    526            if not isinstance(expression.parent, exp.Select):
    527                # This sample clause only applies to a single source, not the entire resulting relation
    528                tablesample_keyword = "TABLESAMPLE"
    529
    530            return super().tablesample_sql(
    531                expression, sep=sep, tablesample_keyword=tablesample_keyword
    532            )
    533
    534        def interval_sql(self, expression: exp.Interval) -> str:
    535            multiplier: t.Optional[int] = None
    536            unit = expression.text("unit").lower()
    537
    538            if unit.startswith("week"):
    539                multiplier = 7
    540            if unit.startswith("quarter"):
    541                multiplier = 90
    542
    543            if multiplier:
    544                return f"({multiplier} * {super().interval_sql(exp.Interval(this=expression.this, unit=exp.var('DAY')))})"
    545
    546            return super().interval_sql(expression)
    547
    548        def columndef_sql(self, expression: exp.ColumnDef, sep: str = " ") -> str:
    549            if isinstance(expression.parent, exp.UserDefinedFunction):
    550                return self.sql(expression, "this")
    551            return super().columndef_sql(expression, sep)
    552
    553        def join_sql(self, expression: exp.Join) -> str:
    554            if (
    555                expression.side == "LEFT"
    556                and not expression.args.get("on")
    557                and isinstance(expression.this, exp.Unnest)
    558            ):
    559                # Some dialects support `LEFT JOIN UNNEST(...)` without an explicit ON clause
    560                # DuckDB doesn't, but we can just add a dummy ON clause that is always true
    561                return super().join_sql(expression.on(exp.true()))
    562
    563            return super().join_sql(expression)
    564
    565        def generateseries_sql(self, expression: exp.GenerateSeries) -> str:
    566            # GENERATE_SERIES(a, b) -> [a, b], RANGE(a, b) -> [a, b)
    567            if expression.args.get("is_end_exclusive"):
    568                expression.set("is_end_exclusive", None)
    569                return rename_func("RANGE")(self, expression)
    570
    571            return super().generateseries_sql(expression)

class DuckDB(sqlglot.dialects.dialect.Dialect): View Source

    167class DuckDB(Dialect):
    168    NULL_ORDERING = "nulls_are_last"
    169    SUPPORTS_USER_DEFINED_TYPES = False
    170    SAFE_DIVISION = True
    171    INDEX_OFFSET = 1
    172    CONCAT_COALESCE = True
    173
    174    # https://duckdb.org/docs/sql/introduction.html#creating-a-new-table
    175    NORMALIZATION_STRATEGY = NormalizationStrategy.CASE_INSENSITIVE
    176
    177    def to_json_path(self, path: t.Optional[exp.Expression]) -> t.Optional[exp.Expression]:
    178        if isinstance(path, exp.Literal):
    179            # DuckDB also supports the JSON pointer syntax, where every path starts with a `/`.
    180            # Additionally, it allows accessing the back of lists using the `[#-i]` syntax.
    181            # This check ensures we'll avoid trying to parse these as JSON paths, which can
    182            # either result in a noisy warning or in an invalid representation of the path.
    183            path_text = path.name
    184            if path_text.startswith("/") or "[#" in path_text:
    185                return path
    186
    187        return super().to_json_path(path)
    188
    189    class Tokenizer(tokens.Tokenizer):
    190        KEYWORDS = {
    191            **tokens.Tokenizer.KEYWORDS,
    192            "//": TokenType.DIV,
    193            "ATTACH": TokenType.COMMAND,
    194            "BINARY": TokenType.VARBINARY,
    195            "BITSTRING": TokenType.BIT,
    196            "BPCHAR": TokenType.TEXT,
    197            "CHAR": TokenType.TEXT,
    198            "CHARACTER VARYING": TokenType.TEXT,
    199            "EXCLUDE": TokenType.EXCEPT,
    200            "LOGICAL": TokenType.BOOLEAN,
    201            "ONLY": TokenType.ONLY,
    202            "PIVOT_WIDER": TokenType.PIVOT,
    203            "SIGNED": TokenType.INT,
    204            "STRING": TokenType.VARCHAR,
    205            "UBIGINT": TokenType.UBIGINT,
    206            "UINTEGER": TokenType.UINT,
    207            "USMALLINT": TokenType.USMALLINT,
    208            "UTINYINT": TokenType.UTINYINT,
    209            "TIMESTAMP_S": TokenType.TIMESTAMP_S,
    210            "TIMESTAMP_MS": TokenType.TIMESTAMP_MS,
    211            "TIMESTAMP_NS": TokenType.TIMESTAMP_NS,
    212            "TIMESTAMP_US": TokenType.TIMESTAMP,
    213        }
    214
    215        SINGLE_TOKENS = {
    216            **tokens.Tokenizer.SINGLE_TOKENS,
    217            "$": TokenType.PARAMETER,
    218        }
    219
    220    class Parser(parser.Parser):
    221        BITWISE = {
    222            **parser.Parser.BITWISE,
    223            TokenType.TILDA: exp.RegexpLike,
    224        }
    225
    226        FUNCTIONS_WITH_ALIASED_ARGS = {*parser.Parser.FUNCTIONS_WITH_ALIASED_ARGS, "STRUCT_PACK"}
    227
    228        FUNCTIONS = {
    229            **parser.Parser.FUNCTIONS,
    230            "ARRAY_HAS": exp.ArrayContains.from_arg_list,
    231            "ARRAY_SORT": exp.SortArray.from_arg_list,
    232            "ARRAY_REVERSE_SORT": _build_sort_array_desc,
    233            "DATEDIFF": _build_date_diff,
    234            "DATE_DIFF": _build_date_diff,
    235            "DATE_TRUNC": date_trunc_to_time,
    236            "DATETRUNC": date_trunc_to_time,
    237            "DECODE": lambda args: exp.Decode(
    238                this=seq_get(args, 0), charset=exp.Literal.string("utf-8")
    239            ),
    240            "ENCODE": lambda args: exp.Encode(
    241                this=seq_get(args, 0), charset=exp.Literal.string("utf-8")
    242            ),
    243            "EPOCH": exp.TimeToUnix.from_arg_list,
    244            "EPOCH_MS": lambda args: exp.UnixToTime(
    245                this=seq_get(args, 0), scale=exp.UnixToTime.MILLIS
    246            ),
    247            "JSON": exp.ParseJSON.from_arg_list,
    248            "JSON_EXTRACT_PATH": parser.build_extract_json_with_path(exp.JSONExtract),
    249            "JSON_EXTRACT_STRING": parser.build_extract_json_with_path(exp.JSONExtractScalar),
    250            "LIST_HAS": exp.ArrayContains.from_arg_list,
    251            "LIST_REVERSE_SORT": _build_sort_array_desc,
    252            "LIST_SORT": exp.SortArray.from_arg_list,
    253            "LIST_VALUE": exp.Array.from_arg_list,
    254            "MAKE_TIME": exp.TimeFromParts.from_arg_list,
    255            "MAKE_TIMESTAMP": _build_make_timestamp,
    256            "MEDIAN": lambda args: exp.PercentileCont(
    257                this=seq_get(args, 0), expression=exp.Literal.number(0.5)
    258            ),
    259            "QUANTILE_CONT": exp.PercentileCont.from_arg_list,
    260            "QUANTILE_DISC": exp.PercentileDisc.from_arg_list,
    261            "REGEXP_EXTRACT": lambda args: exp.RegexpExtract(
    262                this=seq_get(args, 0), expression=seq_get(args, 1), group=seq_get(args, 2)
    263            ),
    264            "REGEXP_MATCHES": exp.RegexpLike.from_arg_list,
    265            "REGEXP_REPLACE": lambda args: exp.RegexpReplace(
    266                this=seq_get(args, 0),
    267                expression=seq_get(args, 1),
    268                replacement=seq_get(args, 2),
    269                modifiers=seq_get(args, 3),
    270            ),
    271            "STRFTIME": build_formatted_time(exp.TimeToStr, "duckdb"),
    272            "STRING_SPLIT": exp.Split.from_arg_list,
    273            "STRING_SPLIT_REGEX": exp.RegexpSplit.from_arg_list,
    274            "STRING_TO_ARRAY": exp.Split.from_arg_list,
    275            "STRPTIME": build_formatted_time(exp.StrToTime, "duckdb"),
    276            "STRUCT_PACK": exp.Struct.from_arg_list,
    277            "STR_SPLIT": exp.Split.from_arg_list,
    278            "STR_SPLIT_REGEX": exp.RegexpSplit.from_arg_list,
    279            "TO_TIMESTAMP": exp.UnixToTime.from_arg_list,
    280            "UNNEST": exp.Explode.from_arg_list,
    281            "XOR": binary_from_function(exp.BitwiseXor),
    282            "GENERATE_SERIES": _build_generate_series(),
    283            "RANGE": _build_generate_series(end_exclusive=True),
    284        }
    285
    286        FUNCTION_PARSERS = parser.Parser.FUNCTION_PARSERS.copy()
    287        FUNCTION_PARSERS.pop("DECODE")
    288
    289        TABLE_ALIAS_TOKENS = parser.Parser.TABLE_ALIAS_TOKENS - {
    290            TokenType.SEMI,
    291            TokenType.ANTI,
    292        }
    293
    294        PLACEHOLDER_PARSERS = {
    295            **parser.Parser.PLACEHOLDER_PARSERS,
    296            TokenType.PARAMETER: lambda self: (
    297                self.expression(exp.Placeholder, this=self._prev.text)
    298                if self._match(TokenType.NUMBER) or self._match_set(self.ID_VAR_TOKENS)
    299                else None
    300            ),
    301        }
    302
    303        def _parse_types(
    304            self, check_func: bool = False, schema: bool = False, allow_identifiers: bool = True
    305        ) -> t.Optional[exp.Expression]:
    306            this = super()._parse_types(
    307                check_func=check_func, schema=schema, allow_identifiers=allow_identifiers
    308            )
    309
    310            # DuckDB treats NUMERIC and DECIMAL without precision as DECIMAL(18, 3)
    311            # See: https://duckdb.org/docs/sql/data_types/numeric
    312            if (
    313                isinstance(this, exp.DataType)
    314                and this.is_type("numeric", "decimal")
    315                and not this.expressions
    316            ):
    317                return exp.DataType.build("DECIMAL(18, 3)")
    318
    319            return this
    320
    321        def _parse_struct_types(self, type_required: bool = False) -> t.Optional[exp.Expression]:
    322            return self._parse_field_def()
    323
    324        def _pivot_column_names(self, aggregations: t.List[exp.Expression]) -> t.List[str]:
    325            if len(aggregations) == 1:
    326                return super()._pivot_column_names(aggregations)
    327            return pivot_column_names(aggregations, dialect="duckdb")
    328
    329    class Generator(generator.Generator):
    330        PARAMETER_TOKEN = "$"
    331        NAMED_PLACEHOLDER_TOKEN = "$"
    332        JOIN_HINTS = False
    333        TABLE_HINTS = False
    334        QUERY_HINTS = False
    335        LIMIT_FETCH = "LIMIT"
    336        STRUCT_DELIMITER = ("(", ")")
    337        RENAME_TABLE_WITH_DB = False
    338        NVL2_SUPPORTED = False
    339        SEMI_ANTI_JOIN_WITH_SIDE = False
    340        TABLESAMPLE_KEYWORDS = "USING SAMPLE"
    341        TABLESAMPLE_SEED_KEYWORD = "REPEATABLE"
    342        LAST_DAY_SUPPORTS_DATE_PART = False
    343        JSON_KEY_VALUE_PAIR_SEP = ","
    344        IGNORE_NULLS_IN_FUNC = True
    345        JSON_PATH_BRACKETED_KEY_SUPPORTED = False
    346        SUPPORTS_CREATE_TABLE_LIKE = False
    347        MULTI_ARG_DISTINCT = False
    348        CAN_IMPLEMENT_ARRAY_ANY = True
    349
    350        TRANSFORMS = {
    351            **generator.Generator.TRANSFORMS,
    352            exp.ApproxDistinct: approx_count_distinct_sql,
    353            exp.Array: lambda self, e: (
    354                self.func("ARRAY", e.expressions[0])
    355                if e.expressions and e.expressions[0].find(exp.Select)
    356                else inline_array_sql(self, e)
    357            ),
    358            exp.ArrayFilter: rename_func("LIST_FILTER"),
    359            exp.ArraySize: rename_func("ARRAY_LENGTH"),
    360            exp.ArgMax: arg_max_or_min_no_count("ARG_MAX"),
    361            exp.ArgMin: arg_max_or_min_no_count("ARG_MIN"),
    362            exp.ArraySort: _array_sort_sql,
    363            exp.ArraySum: rename_func("LIST_SUM"),
    364            exp.BitwiseXor: rename_func("XOR"),
    365            exp.CommentColumnConstraint: no_comment_column_constraint_sql,
    366            exp.CurrentDate: lambda *_: "CURRENT_DATE",
    367            exp.CurrentTime: lambda *_: "CURRENT_TIME",
    368            exp.CurrentTimestamp: lambda *_: "CURRENT_TIMESTAMP",
    369            exp.DayOfMonth: rename_func("DAYOFMONTH"),
    370            exp.DayOfWeek: rename_func("DAYOFWEEK"),
    371            exp.DayOfYear: rename_func("DAYOFYEAR"),
    372            exp.DataType: _datatype_sql,
    373            exp.Date: _date_sql,
    374            exp.DateAdd: _date_delta_sql,
    375            exp.DateFromParts: rename_func("MAKE_DATE"),
    376            exp.DateSub: _date_delta_sql,
    377            exp.DateDiff: lambda self, e: self.func(
    378                "DATE_DIFF", f"'{e.args.get('unit') or 'DAY'}'", e.expression, e.this
    379            ),
    380            exp.DateStrToDate: datestrtodate_sql,
    381            exp.DateToDi: lambda self,
    382            e: f"CAST(STRFTIME({self.sql(e, 'this')}, {DuckDB.DATEINT_FORMAT}) AS INT)",
    383            exp.Decode: lambda self, e: encode_decode_sql(self, e, "DECODE", replace=False),
    384            exp.DiToDate: lambda self,
    385            e: f"CAST(STRPTIME(CAST({self.sql(e, 'this')} AS TEXT), {DuckDB.DATEINT_FORMAT}) AS DATE)",
    386            exp.Encode: lambda self, e: encode_decode_sql(self, e, "ENCODE", replace=False),
    387            exp.Explode: rename_func("UNNEST"),
    388            exp.IntDiv: lambda self, e: self.binary(e, "//"),
    389            exp.IsInf: rename_func("ISINF"),
    390            exp.IsNan: rename_func("ISNAN"),
    391            exp.JSONExtract: arrow_json_extract_sql,
    392            exp.JSONExtractScalar: arrow_json_extract_sql,
    393            exp.JSONFormat: _json_format_sql,
    394            exp.LogicalOr: rename_func("BOOL_OR"),
    395            exp.LogicalAnd: rename_func("BOOL_AND"),
    396            exp.MonthsBetween: lambda self, e: self.func(
    397                "DATEDIFF",
    398                "'month'",
    399                exp.cast(e.expression, "timestamp", copy=True),
    400                exp.cast(e.this, "timestamp", copy=True),
    401            ),
    402            exp.ParseJSON: rename_func("JSON"),
    403            exp.PercentileCont: _rename_unless_within_group("PERCENTILE_CONT", "QUANTILE_CONT"),
    404            exp.PercentileDisc: _rename_unless_within_group("PERCENTILE_DISC", "QUANTILE_DISC"),
    405            # DuckDB doesn't allow qualified columns inside of PIVOT expressions.
    406            # See: https://github.com/duckdb/duckdb/blob/671faf92411182f81dce42ac43de8bfb05d9909e/src/planner/binder/tableref/bind_pivot.cpp#L61-L62
    407            exp.Pivot: transforms.preprocess([transforms.unqualify_columns]),
    408            exp.RegexpExtract: regexp_extract_sql,
    409            exp.RegexpReplace: lambda self, e: self.func(
    410                "REGEXP_REPLACE",
    411                e.this,
    412                e.expression,
    413                e.args.get("replacement"),
    414                e.args.get("modifiers"),
    415            ),
    416            exp.RegexpLike: rename_func("REGEXP_MATCHES"),
    417            exp.RegexpSplit: rename_func("STR_SPLIT_REGEX"),
    418            exp.Rand: rename_func("RANDOM"),
    419            exp.SafeDivide: no_safe_divide_sql,
    420            exp.Split: rename_func("STR_SPLIT"),
    421            exp.SortArray: _sort_array_sql,
    422            exp.StrPosition: str_position_sql,
    423            exp.StrToDate: lambda self, e: f"CAST({str_to_time_sql(self, e)} AS DATE)",
    424            exp.StrToTime: str_to_time_sql,
    425            exp.StrToUnix: lambda self, e: self.func(
    426                "EPOCH", self.func("STRPTIME", e.this, self.format_time(e))
    427            ),
    428            exp.Struct: _struct_sql,
    429            exp.Timestamp: no_timestamp_sql,
    430            exp.TimestampDiff: lambda self, e: self.func(
    431                "DATE_DIFF", exp.Literal.string(e.unit), e.expression, e.this
    432            ),
    433            exp.TimestampTrunc: timestamptrunc_sql,
    434            exp.TimeStrToDate: lambda self, e: self.sql(exp.cast(e.this, "date")),
    435            exp.TimeStrToTime: timestrtotime_sql,
    436            exp.TimeStrToUnix: lambda self, e: self.func("EPOCH", exp.cast(e.this, "timestamp")),
    437            exp.TimeToStr: lambda self, e: self.func("STRFTIME", e.this, self.format_time(e)),
    438            exp.TimeToUnix: rename_func("EPOCH"),
    439            exp.TsOrDiToDi: lambda self,
    440            e: f"CAST(SUBSTR(REPLACE(CAST({self.sql(e, 'this')} AS TEXT), '-', ''), 1, 8) AS INT)",
    441            exp.TsOrDsAdd: _ts_or_ds_add_sql,
    442            exp.TsOrDsDiff: lambda self, e: self.func(
    443                "DATE_DIFF",
    444                f"'{e.args.get('unit') or 'DAY'}'",
    445                exp.cast(e.expression, "TIMESTAMP"),
    446                exp.cast(e.this, "TIMESTAMP"),
    447            ),
    448            exp.UnixToStr: lambda self, e: self.func(
    449                "STRFTIME", self.func("TO_TIMESTAMP", e.this), self.format_time(e)
    450            ),
    451            exp.UnixToTime: _unix_to_time_sql,
    452            exp.UnixToTimeStr: lambda self, e: f"CAST(TO_TIMESTAMP({self.sql(e, 'this')}) AS TEXT)",
    453            exp.VariancePop: rename_func("VAR_POP"),
    454            exp.WeekOfYear: rename_func("WEEKOFYEAR"),
    455            exp.Xor: bool_xor_sql,
    456        }
    457
    458        SUPPORTED_JSON_PATH_PARTS = {
    459            exp.JSONPathKey,
    460            exp.JSONPathRoot,
    461            exp.JSONPathSubscript,
    462            exp.JSONPathWildcard,
    463        }
    464
    465        TYPE_MAPPING = {
    466            **generator.Generator.TYPE_MAPPING,
    467            exp.DataType.Type.BINARY: "BLOB",
    468            exp.DataType.Type.CHAR: "TEXT",
    469            exp.DataType.Type.FLOAT: "REAL",
    470            exp.DataType.Type.NCHAR: "TEXT",
    471            exp.DataType.Type.NVARCHAR: "TEXT",
    472            exp.DataType.Type.UINT: "UINTEGER",
    473            exp.DataType.Type.VARBINARY: "BLOB",
    474            exp.DataType.Type.VARCHAR: "TEXT",
    475            exp.DataType.Type.TIMESTAMP_S: "TIMESTAMP_S",
    476            exp.DataType.Type.TIMESTAMP_MS: "TIMESTAMP_MS",
    477            exp.DataType.Type.TIMESTAMP_NS: "TIMESTAMP_NS",
    478        }
    479
    480        STAR_MAPPING = {**generator.Generator.STAR_MAPPING, "except": "EXCLUDE"}
    481
    482        UNWRAPPED_INTERVAL_VALUES = (exp.Column, exp.Literal, exp.Paren)
    483
    484        # DuckDB doesn't generally support CREATE TABLE .. properties
    485        # https://duckdb.org/docs/sql/statements/create_table.html
    486        PROPERTIES_LOCATION = {
    487            prop: exp.Properties.Location.UNSUPPORTED
    488            for prop in generator.Generator.PROPERTIES_LOCATION
    489        }
    490
    491        # There are a few exceptions (e.g. temporary tables) which are supported or
    492        # can be transpiled to DuckDB, so we explicitly override them accordingly
    493        PROPERTIES_LOCATION[exp.LikeProperty] = exp.Properties.Location.POST_SCHEMA
    494        PROPERTIES_LOCATION[exp.TemporaryProperty] = exp.Properties.Location.POST_CREATE
    495
    496        def timefromparts_sql(self, expression: exp.TimeFromParts) -> str:
    497            nano = expression.args.get("nano")
    498            if nano is not None:
    499                expression.set(
    500                    "sec", expression.args["sec"] + nano.pop() / exp.Literal.number(1000000000.0)
    501                )
    502
    503            return rename_func("MAKE_TIME")(self, expression)
    504
    505        def timestampfromparts_sql(self, expression: exp.TimestampFromParts) -> str:
    506            sec = expression.args["sec"]
    507
    508            milli = expression.args.get("milli")
    509            if milli is not None:
    510                sec += milli.pop() / exp.Literal.number(1000.0)
    511
    512            nano = expression.args.get("nano")
    513            if nano is not None:
    514                sec += nano.pop() / exp.Literal.number(1000000000.0)
    515
    516            if milli or nano:
    517                expression.set("sec", sec)
    518
    519            return rename_func("MAKE_TIMESTAMP")(self, expression)
    520
    521        def tablesample_sql(
    522            self,
    523            expression: exp.TableSample,
    524            sep: str = " AS ",
    525            tablesample_keyword: t.Optional[str] = None,
    526        ) -> str:
    527            if not isinstance(expression.parent, exp.Select):
    528                # This sample clause only applies to a single source, not the entire resulting relation
    529                tablesample_keyword = "TABLESAMPLE"
    530
    531            return super().tablesample_sql(
    532                expression, sep=sep, tablesample_keyword=tablesample_keyword
    533            )
    534
    535        def interval_sql(self, expression: exp.Interval) -> str:
    536            multiplier: t.Optional[int] = None
    537            unit = expression.text("unit").lower()
    538
    539            if unit.startswith("week"):
    540                multiplier = 7
    541            if unit.startswith("quarter"):
    542                multiplier = 90
    543
    544            if multiplier:
    545                return f"({multiplier} * {super().interval_sql(exp.Interval(this=expression.this, unit=exp.var('DAY')))})"
    546
    547            return super().interval_sql(expression)
    548
    549        def columndef_sql(self, expression: exp.ColumnDef, sep: str = " ") -> str:
    550            if isinstance(expression.parent, exp.UserDefinedFunction):
    551                return self.sql(expression, "this")
    552            return super().columndef_sql(expression, sep)
    553
    554        def join_sql(self, expression: exp.Join) -> str:
    555            if (
    556                expression.side == "LEFT"
    557                and not expression.args.get("on")
    558                and isinstance(expression.this, exp.Unnest)
    559            ):
    560                # Some dialects support `LEFT JOIN UNNEST(...)` without an explicit ON clause
    561                # DuckDB doesn't, but we can just add a dummy ON clause that is always true
    562                return super().join_sql(expression.on(exp.true()))
    563
    564            return super().join_sql(expression)
    565
    566        def generateseries_sql(self, expression: exp.GenerateSeries) -> str:
    567            # GENERATE_SERIES(a, b) -> [a, b], RANGE(a, b) -> [a, b)
    568            if expression.args.get("is_end_exclusive"):
    569                expression.set("is_end_exclusive", None)
    570                return rename_func("RANGE")(self, expression)
    571
    572            return super().generateseries_sql(expression)

NULL_ORDERING = 'nulls_are_last'

Default `NULL` ordering method to use if not explicitly set. Possible values: `"nulls_are_small"`, `"nulls_are_large"`, `"nulls_are_last"`

SUPPORTS_USER_DEFINED_TYPES = False

Whether user-defined data types are supported.

SAFE_DIVISION = True

Whether division by zero throws an error (`False`) or returns NULL (`True`).

INDEX_OFFSET = 1

The base index offset for arrays.

CONCAT_COALESCE = True

A `NULL` arg in `CONCAT` yields `NULL` by default, but in some dialects it yields an empty string.

NORMALIZATION_STRATEGY = <NormalizationStrategy.CASE_INSENSITIVE: 'CASE_INSENSITIVE'>

Specifies the strategy according to which identifiers should be normalized.

def to_json_path( self, path: Optional[sqlglot.expressions.Expression]) -> Optional[sqlglot.expressions.Expression]: View Source

    177    def to_json_path(self, path: t.Optional[exp.Expression]) -> t.Optional[exp.Expression]:
    178        if isinstance(path, exp.Literal):
    179            # DuckDB also supports the JSON pointer syntax, where every path starts with a `/`.
    180            # Additionally, it allows accessing the back of lists using the `[#-i]` syntax.
    181            # This check ensures we'll avoid trying to parse these as JSON paths, which can
    182            # either result in a noisy warning or in an invalid representation of the path.
    183            path_text = path.name
    184            if path_text.startswith("/") or "[#" in path_text:
    185                return path
    186
    187        return super().to_json_path(path)

tokenizer_class = <class 'DuckDB.Tokenizer'>
parser_class = <class 'DuckDB.Parser'>
generator_class = <class 'DuckDB.Generator'>
TIME_TRIE: Dict = {}
FORMAT_TRIE: Dict = {}
INVERSE_TIME_MAPPING: Dict[str, str] = {}
INVERSE_TIME_TRIE: Dict = {}
INVERSE_ESCAPE_SEQUENCES: Dict[str, str] = {}
QUOTE_START = "'"
QUOTE_END = "'"
IDENTIFIER_START = '"'
IDENTIFIER_END = '"'
BIT_START: Optional[str] = None
BIT_END: Optional[str] = None
HEX_START: Optional[str] = None
HEX_END: Optional[str] = None
BYTE_START: Optional[str] = None
BYTE_END: Optional[str] = None
UNICODE_START: Optional[str] = None
UNICODE_END: Optional[str] = None

##### Inherited Members

sqlglot.dialects.dialect.Dialect
  Dialect
  WEEK_OFFSET
  UNNEST_COLUMN_ONLY
  ALIAS_POST_TABLESAMPLE
  TABLESAMPLE_SIZE_IS_PERCENT
  IDENTIFIERS_CAN_START_WITH_DIGIT
  DPIPE_IS_STRING_CONCAT
  STRICT_STRING_CONCAT
  SUPPORTS_SEMI_ANTI_JOIN
  NORMALIZE_FUNCTIONS
  LOG_BASE_FIRST
  TYPED_DIVISION
  DATE_FORMAT
  DATEINT_FORMAT
  TIME_FORMAT
  TIME_MAPPING
  FORMAT_MAPPING
  ESCAPE_SEQUENCES
  PSEUDOCOLUMNS
  PREFER_CTE_ALIAS_COLUMN
  get_or_raise
  format_time
  normalize_identifier
  case_sensitive
  can_identify
  quote_identifier
  parse
  parse_into
  generate
  transpile
  tokenize
  tokenizer
  parser
  generator

class DuckDB.Tokenizer(sqlglot.tokens.Tokenizer): View Source

    189    class Tokenizer(tokens.Tokenizer):
    190        KEYWORDS = {
    191            **tokens.Tokenizer.KEYWORDS,
    192            "//": TokenType.DIV,
    193            "ATTACH": TokenType.COMMAND,
    194            "BINARY": TokenType.VARBINARY,
    195            "BITSTRING": TokenType.BIT,
    196            "BPCHAR": TokenType.TEXT,
    197            "CHAR": TokenType.TEXT,
    198            "CHARACTER VARYING": TokenType.TEXT,
    199            "EXCLUDE": TokenType.EXCEPT,
    200            "LOGICAL": TokenType.BOOLEAN,
    201            "ONLY": TokenType.ONLY,
    202            "PIVOT_WIDER": TokenType.PIVOT,
    203            "SIGNED": TokenType.INT,
    204            "STRING": TokenType.VARCHAR,
    205            "UBIGINT": TokenType.UBIGINT,
    206            "UINTEGER": TokenType.UINT,
    207            "USMALLINT": TokenType.USMALLINT,
    208            "UTINYINT": TokenType.UTINYINT,
    209            "TIMESTAMP_S": TokenType.TIMESTAMP_S,
    210            "TIMESTAMP_MS": TokenType.TIMESTAMP_MS,
    211            "TIMESTAMP_NS": TokenType.TIMESTAMP_NS,
    212            "TIMESTAMP_US": TokenType.TIMESTAMP,
    213        }
    214
    215        SINGLE_TOKENS = {
    216            **tokens.Tokenizer.SINGLE_TOKENS,
    217            "$": TokenType.PARAMETER,
    218        }

KEYWORDS = {'{%': <TokenType.BLOCK_START: 'BLOCK_START'>, '{%+': <TokenType.BLOCK_START: 'BLOCK_START'>, '{%-': <TokenType.BLOCK_START: 'BLOCK_START'>, '%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '+%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '-%}': <TokenType.BLOCK_END: 'BLOCK_END'>, '{{+': <TokenType.BLOCK_START: 'BLOCK_START'>, '{{-': <TokenType.BLOCK_START: 'BLOCK_START'>, '+}}': <TokenType.BLOCK_END: 'BLOCK_END'>, '-}}': <TokenType.BLOCK_END: 'BLOCK_END'>, '/*+': <TokenType.HINT: 'HINT'>, '==': <TokenType.EQ: 'EQ'>, '::': <TokenType.DCOLON: 'DCOLON'>, '||': <TokenType.DPIPE: 'DPIPE'>, '>=': <TokenType.GTE: 'GTE'>, '<=': <TokenType.LTE: 'LTE'>, '<>': <TokenType.NEQ: 'NEQ'>, '!=': <TokenType.NEQ: 'NEQ'>, ':=': <TokenType.COLON_EQ: 'COLON_EQ'>, '<=>': <TokenType.NULLSAFE_EQ: 'NULLSAFE_EQ'>, '->': <TokenType.ARROW: 'ARROW'>, '->>': <TokenType.DARROW: 'DARROW'>, '=>': <TokenType.FARROW: 'FARROW'>, '#>': <TokenType.HASH_ARROW: 'HASH_ARROW'>, '#>>': <TokenType.DHASH_ARROW: 'DHASH_ARROW'>, '<->': <TokenType.LR_ARROW: 'LR_ARROW'>, '&&': <TokenType.DAMP: 'DAMP'>, '??': <TokenType.DQMARK: 'DQMARK'>, 'ALL': <TokenType.ALL: 'ALL'>, 'ALWAYS': <TokenType.ALWAYS: 'ALWAYS'>, 'AND': <TokenType.AND: 'AND'>, 'ANTI': <TokenType.ANTI: 'ANTI'>, 'ANY': <TokenType.ANY: 'ANY'>, 'ASC': <TokenType.ASC: 'ASC'>, 'AS': <TokenType.ALIAS: 'ALIAS'>, 'ASOF': <TokenType.ASOF: 'ASOF'>, 'AUTOINCREMENT': <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>, 'AUTO_INCREMENT': <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>, 'BEGIN': <TokenType.BEGIN: 'BEGIN'>, 'BETWEEN': <TokenType.BETWEEN: 'BETWEEN'>, 'CACHE': <TokenType.CACHE: 'CACHE'>, 'UNCACHE': <TokenType.UNCACHE: 'UNCACHE'>, 'CASE': <TokenType.CASE: 'CASE'>, 'CHARACTER SET': <TokenType.CHARACTER_SET: 'CHARACTER_SET'>, 'CLUSTER BY': <TokenType.CLUSTER_BY: 'CLUSTER_BY'>, 'COLLATE': <TokenType.COLLATE: 'COLLATE'>, 'COLUMN': <TokenType.COLUMN: 'COLUMN'>, 'COMMIT': <TokenType.COMMIT: 'COMMIT'>, 'CONNECT BY': <TokenType.CONNECT_BY: 'CONNECT_BY'>, 'CONSTRAINT': <TokenType.CONSTRAINT: 'CONSTRAINT'>, 'CREATE': <TokenType.CREATE: 'CREATE'>, 'CROSS': <TokenType.CROSS: 'CROSS'>, 'CUBE': <TokenType.CUBE: 'CUBE'>, 'CURRENT_DATE': <TokenType.CURRENT_DATE: 'CURRENT_DATE'>, 'CURRENT_TIME': <TokenType.CURRENT_TIME: 'CURRENT_TIME'>, 'CURRENT_TIMESTAMP': <TokenType.CURRENT_TIMESTAMP: 'CURRENT_TIMESTAMP'>, 'CURRENT_USER': <TokenType.CURRENT_USER: 'CURRENT_USER'>, 'DATABASE': <TokenType.DATABASE: 'DATABASE'>, 'DEFAULT': <TokenType.DEFAULT: 'DEFAULT'>, 'DELETE': <TokenType.DELETE: 'DELETE'>, 'DESC': <TokenType.DESC: 'DESC'>, 'DESCRIBE': <TokenType.DESCRIBE: 'DESCRIBE'>, 'DISTINCT': <TokenType.DISTINCT: 'DISTINCT'>, 'DISTRIBUTE BY': <TokenType.DISTRIBUTE_BY: 'DISTRIBUTE_BY'>, 'DIV': <TokenType.DIV: 'DIV'>, 'DROP': <TokenType.DROP: 'DROP'>, 'ELSE': <TokenType.ELSE: 'ELSE'>, 'END': <TokenType.END: 'END'>, 'ENUM': <TokenType.ENUM: 'ENUM'>, 'ESCAPE': <TokenType.ESCAPE: 'ESCAPE'>, 'EXCEPT': <TokenType.EXCEPT: 'EXCEPT'>, 'EXECUTE': <TokenType.EXECUTE: 'EXECUTE'>, 'EXISTS': <TokenType.EXISTS: 'EXISTS'>, 'FALSE': <TokenType.FALSE: 'FALSE'>, 'FETCH': <TokenType.FETCH: 'FETCH'>, 'FILTER': <TokenType.FILTER: 'FILTER'>, 'FIRST': <TokenType.FIRST: 'FIRST'>, 'FULL': <TokenType.FULL: 'FULL'>, 'FUNCTION': <TokenType.FUNCTION: 'FUNCTION'>, 'FOR': <TokenType.FOR: 'FOR'>, 'FOREIGN KEY': <TokenType.FOREIGN_KEY: 'FOREIGN_KEY'>, 'FORMAT': <TokenType.FORMAT: 'FORMAT'>, 'FROM': <TokenType.FROM: 'FROM'>, 'GEOGRAPHY': <TokenType.GEOGRAPHY: 'GEOGRAPHY'>, 'GEOMETRY': <TokenType.GEOMETRY: 'GEOMETRY'>, 'GLOB': <TokenType.GLOB: 'GLOB'>, 'GROUP BY': <TokenType.GROUP_BY: 'GROUP_BY'>, 'GROUPING SETS': <TokenType.GROUPING_SETS: 'GROUPING_SETS'>, 'HAVING': <TokenType.HAVING: 'HAVING'>, 'ILIKE': <TokenType.ILIKE: 'ILIKE'>, 'IN': <TokenType.IN: 'IN'>, 'INDEX': <TokenType.INDEX: 'INDEX'>, 'INET': <TokenType.INET: 'INET'>, 'INNER': <TokenType.INNER: 'INNER'>, 'INSERT': <TokenType.INSERT: 'INSERT'>, 'INTERVAL': <TokenType.INTERVAL: 'INTERVAL'>, 'INTERSECT': <TokenType.INTERSECT: 'INTERSECT'>, 'INTO': <TokenType.INTO: 'INTO'>, 'IS': <TokenType.IS: 'IS'>, 'ISNULL': <TokenType.ISNULL: 'ISNULL'>, 'JOIN': <TokenType.JOIN: 'JOIN'>, 'KEEP': <TokenType.KEEP: 'KEEP'>, 'KILL': <TokenType.KILL: 'KILL'>, 'LATERAL': <TokenType.LATERAL: 'LATERAL'>, 'LEFT': <TokenType.LEFT: 'LEFT'>, 'LIKE': <TokenType.LIKE: 'LIKE'>, 'LIMIT': <TokenType.LIMIT: 'LIMIT'>, 'LOAD': <TokenType.LOAD: 'LOAD'>, 'LOCK': <TokenType.LOCK: 'LOCK'>, 'MERGE': <TokenType.MERGE: 'MERGE'>, 'NATURAL': <TokenType.NATURAL: 'NATURAL'>, 'NEXT': <TokenType.NEXT: 'NEXT'>, 'NOT': <TokenType.NOT: 'NOT'>, 'NOTNULL': <TokenType.NOTNULL: 'NOTNULL'>, 'NULL': <TokenType.NULL: 'NULL'>, 'OBJECT': <TokenType.OBJECT: 'OBJECT'>, 'OFFSET': <TokenType.OFFSET: 'OFFSET'>, 'ON': <TokenType.ON: 'ON'>, 'OR': <TokenType.OR: 'OR'>, 'XOR': <TokenType.XOR: 'XOR'>, 'ORDER BY': <TokenType.ORDER_BY: 'ORDER_BY'>, 'ORDINALITY': <TokenType.ORDINALITY: 'ORDINALITY'>, 'OUTER': <TokenType.OUTER: 'OUTER'>, 'OVER': <TokenType.OVER: 'OVER'>, 'OVERLAPS': <TokenType.OVERLAPS: 'OVERLAPS'>, 'OVERWRITE': <TokenType.OVERWRITE: 'OVERWRITE'>, 'PARTITION': <TokenType.PARTITION: 'PARTITION'>, 'PARTITION BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PARTITIONED BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PARTITIONED_BY': <TokenType.PARTITION_BY: 'PARTITION_BY'>, 'PERCENT': <TokenType.PERCENT: 'PERCENT'>, 'PIVOT': <TokenType.PIVOT: 'PIVOT'>, 'PRAGMA': <TokenType.PRAGMA: 'PRAGMA'>, 'PRIMARY KEY': <TokenType.PRIMARY_KEY: 'PRIMARY_KEY'>, 'PROCEDURE': <TokenType.PROCEDURE: 'PROCEDURE'>, 'QUALIFY': <TokenType.QUALIFY: 'QUALIFY'>, 'RANGE': <TokenType.RANGE: 'RANGE'>, 'RECURSIVE': <TokenType.RECURSIVE: 'RECURSIVE'>, 'REGEXP': <TokenType.RLIKE: 'RLIKE'>, 'REPLACE': <TokenType.REPLACE: 'REPLACE'>, 'RETURNING': <TokenType.RETURNING: 'RETURNING'>, 'REFERENCES': <TokenType.REFERENCES: 'REFERENCES'>, 'RIGHT': <TokenType.RIGHT: 'RIGHT'>, 'RLIKE': <TokenType.RLIKE: 'RLIKE'>, 'ROLLBACK': <TokenType.ROLLBACK: 'ROLLBACK'>, 'ROLLUP': <TokenType.ROLLUP: 'ROLLUP'>, 'ROW': <TokenType.ROW: 'ROW'>, 'ROWS': <TokenType.ROWS: 'ROWS'>, 'SCHEMA': <TokenType.SCHEMA: 'SCHEMA'>, 'SELECT': <TokenType.SELECT: 'SELECT'>, 'SEMI': <TokenType.SEMI: 'SEMI'>, 'SET': <TokenType.SET: 'SET'>, 'SETTINGS': <TokenType.SETTINGS: 'SETTINGS'>, 'SHOW': <TokenType.SHOW: 'SHOW'>, 'SIMILAR TO': <TokenType.SIMILAR_TO: 'SIMILAR_TO'>, 'SOME': <TokenType.SOME: 'SOME'>, 'SORT BY': <TokenType.SORT_BY: 'SORT_BY'>, 'START WITH': <TokenType.START_WITH: 'START_WITH'>, 'TABLE': <TokenType.TABLE: 'TABLE'>, 'TABLESAMPLE': <TokenType.TABLE_SAMPLE: 'TABLE_SAMPLE'>, 'TEMP': <TokenType.TEMPORARY: 'TEMPORARY'>, 'TEMPORARY': <TokenType.TEMPORARY: 'TEMPORARY'>, 'THEN': <TokenType.THEN: 'THEN'>, 'TRUE': <TokenType.TRUE: 'TRUE'>, 'TRUNCATE': <TokenType.TRUNCATE: 'TRUNCATE'>, 'UNION': <TokenType.UNION: 'UNION'>, 'UNKNOWN': <TokenType.UNKNOWN: 'UNKNOWN'>, 'UNNEST': <TokenType.UNNEST: 'UNNEST'>, 'UNPIVOT': <TokenType.UNPIVOT: 'UNPIVOT'>, 'UPDATE': <TokenType.UPDATE: 'UPDATE'>, 'USE': <TokenType.USE: 'USE'>, 'USING': <TokenType.USING: 'USING'>, 'UUID': <TokenType.UUID: 'UUID'>, 'VALUES': <TokenType.VALUES: 'VALUES'>, 'VIEW': <TokenType.VIEW: 'VIEW'>, 'VOLATILE': <TokenType.VOLATILE: 'VOLATILE'>, 'WHEN': <TokenType.WHEN: 'WHEN'>, 'WHERE': <TokenType.WHERE: 'WHERE'>, 'WINDOW': <TokenType.WINDOW: 'WINDOW'>, 'WITH': <TokenType.WITH: 'WITH'>, 'APPLY': <TokenType.APPLY: 'APPLY'>, 'ARRAY': <TokenType.ARRAY: 'ARRAY'>, 'BIT': <TokenType.BIT: 'BIT'>, 'BOOL': <TokenType.BOOLEAN: 'BOOLEAN'>, 'BOOLEAN': <TokenType.BOOLEAN: 'BOOLEAN'>, 'BYTE': <TokenType.TINYINT: 'TINYINT'>, 'MEDIUMINT': <TokenType.MEDIUMINT: 'MEDIUMINT'>, 'INT1': <TokenType.TINYINT: 'TINYINT'>, 'TINYINT': <TokenType.TINYINT: 'TINYINT'>, 'INT16': <TokenType.SMALLINT: 'SMALLINT'>, 'SHORT': <TokenType.SMALLINT: 'SMALLINT'>, 'SMALLINT': <TokenType.SMALLINT: 'SMALLINT'>, 'INT128': <TokenType.INT128: 'INT128'>, 'HUGEINT': <TokenType.INT128: 'INT128'>, 'INT2': <TokenType.SMALLINT: 'SMALLINT'>, 'INTEGER': <TokenType.INT: 'INT'>, 'INT': <TokenType.INT: 'INT'>, 'INT4': <TokenType.INT: 'INT'>, 'INT32': <TokenType.INT: 'INT'>, 'INT64': <TokenType.BIGINT: 'BIGINT'>, 'LONG': <TokenType.BIGINT: 'BIGINT'>, 'BIGINT': <TokenType.BIGINT: 'BIGINT'>, 'INT8': <TokenType.TINYINT: 'TINYINT'>, 'DEC': <TokenType.DECIMAL: 'DECIMAL'>, 'DECIMAL': <TokenType.DECIMAL: 'DECIMAL'>, 'BIGDECIMAL': <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, 'BIGNUMERIC': <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, 'MAP': <TokenType.MAP: 'MAP'>, 'NULLABLE': <TokenType.NULLABLE: 'NULLABLE'>, 'NUMBER': <TokenType.DECIMAL: 'DECIMAL'>, 'NUMERIC': <TokenType.DECIMAL: 'DECIMAL'>, 'FIXED': <TokenType.DECIMAL: 'DECIMAL'>, 'REAL': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT4': <TokenType.FLOAT: 'FLOAT'>, 'FLOAT8': <TokenType.DOUBLE: 'DOUBLE'>, 'DOUBLE': <TokenType.DOUBLE: 'DOUBLE'>, 'DOUBLE PRECISION': <TokenType.DOUBLE: 'DOUBLE'>, 'JSON': <TokenType.JSON: 'JSON'>, 'CHAR': <TokenType.TEXT: 'TEXT'>, 'CHARACTER': <TokenType.CHAR: 'CHAR'>, 'NCHAR': <TokenType.NCHAR: 'NCHAR'>, 'VARCHAR': <TokenType.VARCHAR: 'VARCHAR'>, 'VARCHAR2': <TokenType.VARCHAR: 'VARCHAR'>, 'NVARCHAR': <TokenType.NVARCHAR: 'NVARCHAR'>, 'NVARCHAR2': <TokenType.NVARCHAR: 'NVARCHAR'>, 'BPCHAR': <TokenType.TEXT: 'TEXT'>, 'STR': <TokenType.TEXT: 'TEXT'>, 'STRING': <TokenType.VARCHAR: 'VARCHAR'>, 'TEXT': <TokenType.TEXT: 'TEXT'>, 'LONGTEXT': <TokenType.LONGTEXT: 'LONGTEXT'>, 'MEDIUMTEXT': <TokenType.MEDIUMTEXT: 'MEDIUMTEXT'>, 'TINYTEXT': <TokenType.TINYTEXT: 'TINYTEXT'>, 'CLOB': <TokenType.TEXT: 'TEXT'>, 'LONGVARCHAR': <TokenType.TEXT: 'TEXT'>, 'BINARY': <TokenType.VARBINARY: 'VARBINARY'>, 'BLOB': <TokenType.VARBINARY: 'VARBINARY'>, 'LONGBLOB': <TokenType.LONGBLOB: 'LONGBLOB'>, 'MEDIUMBLOB': <TokenType.MEDIUMBLOB: 'MEDIUMBLOB'>, 'TINYBLOB': <TokenType.TINYBLOB: 'TINYBLOB'>, 'BYTEA': <TokenType.VARBINARY: 'VARBINARY'>, 'VARBINARY': <TokenType.VARBINARY: 'VARBINARY'>, 'TIME': <TokenType.TIME: 'TIME'>, 'TIMETZ': <TokenType.TIMETZ: 'TIMETZ'>, 'TIMESTAMP': <TokenType.TIMESTAMP: 'TIMESTAMP'>, 'TIMESTAMPTZ': <TokenType.TIMESTAMPTZ: 'TIMESTAMPTZ'>, 'TIMESTAMPLTZ': <TokenType.TIMESTAMPLTZ: 'TIMESTAMPLTZ'>, 'DATE': <TokenType.DATE: 'DATE'>, 'DATETIME': <TokenType.DATETIME: 'DATETIME'>, 'INT4RANGE': <TokenType.INT4RANGE: 'INT4RANGE'>, 'INT4MULTIRANGE': <TokenType.INT4MULTIRANGE: 'INT4MULTIRANGE'>, 'INT8RANGE': <TokenType.INT8RANGE: 'INT8RANGE'>, 'INT8MULTIRANGE': <TokenType.INT8MULTIRANGE: 'INT8MULTIRANGE'>, 'NUMRANGE': <TokenType.NUMRANGE: 'NUMRANGE'>, 'NUMMULTIRANGE': <TokenType.NUMMULTIRANGE: 'NUMMULTIRANGE'>, 'TSRANGE': <TokenType.TSRANGE: 'TSRANGE'>, 'TSMULTIRANGE': <TokenType.TSMULTIRANGE: 'TSMULTIRANGE'>, 'TSTZRANGE': <TokenType.TSTZRANGE: 'TSTZRANGE'>, 'TSTZMULTIRANGE': <TokenType.TSTZMULTIRANGE: 'TSTZMULTIRANGE'>, 'DATERANGE': <TokenType.DATERANGE: 'DATERANGE'>, 'DATEMULTIRANGE': <TokenType.DATEMULTIRANGE: 'DATEMULTIRANGE'>, 'UNIQUE': <TokenType.UNIQUE: 'UNIQUE'>, 'STRUCT': <TokenType.STRUCT: 'STRUCT'>, 'VARIANT': <TokenType.VARIANT: 'VARIANT'>, 'ALTER': <TokenType.ALTER: 'ALTER'>, 'ANALYZE': <TokenType.COMMAND: 'COMMAND'>, 'CALL': <TokenType.COMMAND: 'COMMAND'>, 'COMMENT': <TokenType.COMMENT: 'COMMENT'>, 'COPY': <TokenType.COMMAND: 'COMMAND'>, 'EXPLAIN': <TokenType.COMMAND: 'COMMAND'>, 'GRANT': <TokenType.COMMAND: 'COMMAND'>, 'OPTIMIZE': <TokenType.COMMAND: 'COMMAND'>, 'PREPARE': <TokenType.COMMAND: 'COMMAND'>, 'VACUUM': <TokenType.COMMAND: 'COMMAND'>, 'USER-DEFINED': <TokenType.USERDEFINED: 'USERDEFINED'>, 'FOR VERSION': <TokenType.VERSION_SNAPSHOT: 'VERSION_SNAPSHOT'>, 'FOR TIMESTAMP': <TokenType.TIMESTAMP_SNAPSHOT: 'TIMESTAMP_SNAPSHOT'>, '//': <TokenType.DIV: 'DIV'>, 'ATTACH': <TokenType.COMMAND: 'COMMAND'>, 'BITSTRING': <TokenType.BIT: 'BIT'>, 'CHARACTER VARYING': <TokenType.TEXT: 'TEXT'>, 'EXCLUDE': <TokenType.EXCEPT: 'EXCEPT'>, 'LOGICAL': <TokenType.BOOLEAN: 'BOOLEAN'>, 'ONLY': <TokenType.ONLY: 'ONLY'>, 'PIVOT_WIDER': <TokenType.PIVOT: 'PIVOT'>, 'SIGNED': <TokenType.INT: 'INT'>, 'UBIGINT': <TokenType.UBIGINT: 'UBIGINT'>, 'UINTEGER': <TokenType.UINT: 'UINT'>, 'USMALLINT': <TokenType.USMALLINT: 'USMALLINT'>, 'UTINYINT': <TokenType.UTINYINT: 'UTINYINT'>, 'TIMESTAMP_S': <TokenType.TIMESTAMP_S: 'TIMESTAMP_S'>, 'TIMESTAMP_MS': <TokenType.TIMESTAMP_MS: 'TIMESTAMP_MS'>, 'TIMESTAMP_NS': <TokenType.TIMESTAMP_NS: 'TIMESTAMP_NS'>, 'TIMESTAMP_US': <TokenType.TIMESTAMP: 'TIMESTAMP'>}
SINGLE_TOKENS = {'(': <TokenType.L_PAREN: 'L_PAREN'>, ')': <TokenType.R_PAREN: 'R_PAREN'>, '[': <TokenType.L_BRACKET: 'L_BRACKET'>, ']': <TokenType.R_BRACKET: 'R_BRACKET'>, '{': <TokenType.L_BRACE: 'L_BRACE'>, '}': <TokenType.R_BRACE: 'R_BRACE'>, '&': <TokenType.AMP: 'AMP'>, '^': <TokenType.CARET: 'CARET'>, ':': <TokenType.COLON: 'COLON'>, ',': <TokenType.COMMA: 'COMMA'>, '.': <TokenType.DOT: 'DOT'>, '-': <TokenType.DASH: 'DASH'>, '=': <TokenType.EQ: 'EQ'>, '>': <TokenType.GT: 'GT'>, '<': <TokenType.LT: 'LT'>, '%': <TokenType.MOD: 'MOD'>, '!': <TokenType.NOT: 'NOT'>, '|': <TokenType.PIPE: 'PIPE'>, '+': <TokenType.PLUS: 'PLUS'>, ';': <TokenType.SEMICOLON: 'SEMICOLON'>, '/': <TokenType.SLASH: 'SLASH'>, '\\': <TokenType.BACKSLASH: 'BACKSLASH'>, '*': <TokenType.STAR: 'STAR'>, '~': <TokenType.TILDA: 'TILDA'>, '?': <TokenType.PLACEHOLDER: 'PLACEHOLDER'>, '@': <TokenType.PARAMETER: 'PARAMETER'>, "'": <TokenType.QUOTE: 'QUOTE'>, '`': <TokenType.IDENTIFIER: 'IDENTIFIER'>, '"': <TokenType.IDENTIFIER: 'IDENTIFIER'>, '#': <TokenType.HASH: 'HASH'>, '$': <TokenType.PARAMETER: 'PARAMETER'>}

##### Inherited Members

sqlglot.tokens.Tokenizer
  Tokenizer
  BIT_STRINGS
  BYTE_STRINGS
  HEX_STRINGS
  RAW_STRINGS
  HEREDOC_STRINGS
  UNICODE_STRINGS
  IDENTIFIERS
  IDENTIFIER_ESCAPES
  QUOTES
  STRING_ESCAPES
  VAR_SINGLE_TOKENS
  HEREDOC_TAG_IS_IDENTIFIER
  HEREDOC_STRING_ALTERNATIVE
  WHITE_SPACE
  COMMANDS
  COMMAND_PREFIX_TOKENS
  NUMERIC_LITERALS
  COMMENTS
  dialect
  reset
  tokenize
  tokenize_rs
  size
  sql
  tokens

class DuckDB.Parser(sqlglot.parser.Parser): View Source

    220    class Parser(parser.Parser):
    221        BITWISE = {
    222            **parser.Parser.BITWISE,
    223            TokenType.TILDA: exp.RegexpLike,
    224        }
    225
    226        FUNCTIONS_WITH_ALIASED_ARGS = {*parser.Parser.FUNCTIONS_WITH_ALIASED_ARGS, "STRUCT_PACK"}
    227
    228        FUNCTIONS = {
    229            **parser.Parser.FUNCTIONS,
    230            "ARRAY_HAS": exp.ArrayContains.from_arg_list,
    231            "ARRAY_SORT": exp.SortArray.from_arg_list,
    232            "ARRAY_REVERSE_SORT": _build_sort_array_desc,
    233            "DATEDIFF": _build_date_diff,
    234            "DATE_DIFF": _build_date_diff,
    235            "DATE_TRUNC": date_trunc_to_time,
    236            "DATETRUNC": date_trunc_to_time,
    237            "DECODE": lambda args: exp.Decode(
    238                this=seq_get(args, 0), charset=exp.Literal.string("utf-8")
    239            ),
    240            "ENCODE": lambda args: exp.Encode(
    241                this=seq_get(args, 0), charset=exp.Literal.string("utf-8")
    242            ),
    243            "EPOCH": exp.TimeToUnix.from_arg_list,
    244            "EPOCH_MS": lambda args: exp.UnixToTime(
    245                this=seq_get(args, 0), scale=exp.UnixToTime.MILLIS
    246            ),
    247            "JSON": exp.ParseJSON.from_arg_list,
    248            "JSON_EXTRACT_PATH": parser.build_extract_json_with_path(exp.JSONExtract),
    249            "JSON_EXTRACT_STRING": parser.build_extract_json_with_path(exp.JSONExtractScalar),
    250            "LIST_HAS": exp.ArrayContains.from_arg_list,
    251            "LIST_REVERSE_SORT": _build_sort_array_desc,
    252            "LIST_SORT": exp.SortArray.from_arg_list,
    253            "LIST_VALUE": exp.Array.from_arg_list,
    254            "MAKE_TIME": exp.TimeFromParts.from_arg_list,
    255            "MAKE_TIMESTAMP": _build_make_timestamp,
    256            "MEDIAN": lambda args: exp.PercentileCont(
    257                this=seq_get(args, 0), expression=exp.Literal.number(0.5)
    258            ),
    259            "QUANTILE_CONT": exp.PercentileCont.from_arg_list,
    260            "QUANTILE_DISC": exp.PercentileDisc.from_arg_list,
    261            "REGEXP_EXTRACT": lambda args: exp.RegexpExtract(
    262                this=seq_get(args, 0), expression=seq_get(args, 1), group=seq_get(args, 2)
    263            ),
    264            "REGEXP_MATCHES": exp.RegexpLike.from_arg_list,
    265            "REGEXP_REPLACE": lambda args: exp.RegexpReplace(
    266                this=seq_get(args, 0),
    267                expression=seq_get(args, 1),
    268                replacement=seq_get(args, 2),
    269                modifiers=seq_get(args, 3),
    270            ),
    271            "STRFTIME": build_formatted_time(exp.TimeToStr, "duckdb"),
    272            "STRING_SPLIT": exp.Split.from_arg_list,
    273            "STRING_SPLIT_REGEX": exp.RegexpSplit.from_arg_list,
    274            "STRING_TO_ARRAY": exp.Split.from_arg_list,
    275            "STRPTIME": build_formatted_time(exp.StrToTime, "duckdb"),
    276            "STRUCT_PACK": exp.Struct.from_arg_list,
    277            "STR_SPLIT": exp.Split.from_arg_list,
    278            "STR_SPLIT_REGEX": exp.RegexpSplit.from_arg_list,
    279            "TO_TIMESTAMP": exp.UnixToTime.from_arg_list,
    280            "UNNEST": exp.Explode.from_arg_list,
    281            "XOR": binary_from_function(exp.BitwiseXor),
    282            "GENERATE_SERIES": _build_generate_series(),
    283            "RANGE": _build_generate_series(end_exclusive=True),
    284        }
    285
    286        FUNCTION_PARSERS = parser.Parser.FUNCTION_PARSERS.copy()
    287        FUNCTION_PARSERS.pop("DECODE")
    288
    289        TABLE_ALIAS_TOKENS = parser.Parser.TABLE_ALIAS_TOKENS - {
    290            TokenType.SEMI,
    291            TokenType.ANTI,
    292        }
    293
    294        PLACEHOLDER_PARSERS = {
    295            **parser.Parser.PLACEHOLDER_PARSERS,
    296            TokenType.PARAMETER: lambda self: (
    297                self.expression(exp.Placeholder, this=self._prev.text)
    298                if self._match(TokenType.NUMBER) or self._match_set(self.ID_VAR_TOKENS)
    299                else None
    300            ),
    301        }
    302
    303        def _parse_types(
    304            self, check_func: bool = False, schema: bool = False, allow_identifiers: bool = True
    305        ) -> t.Optional[exp.Expression]:
    306            this = super()._parse_types(
    307                check_func=check_func, schema=schema, allow_identifiers=allow_identifiers
    308            )
    309
    310            # DuckDB treats NUMERIC and DECIMAL without precision as DECIMAL(18, 3)
    311            # See: https://duckdb.org/docs/sql/data_types/numeric
    312            if (
    313                isinstance(this, exp.DataType)
    314                and this.is_type("numeric", "decimal")
    315                and not this.expressions
    316            ):
    317                return exp.DataType.build("DECIMAL(18, 3)")
    318
    319            return this
    320
    321        def _parse_struct_types(self, type_required: bool = False) -> t.Optional[exp.Expression]:
    322            return self._parse_field_def()
    323
    324        def _pivot_column_names(self, aggregations: t.List[exp.Expression]) -> t.List[str]:
    325            if len(aggregations) == 1:
    326                return super()._pivot_column_names(aggregations)
    327            return pivot_column_names(aggregations, dialect="duckdb")

Parser consumes a list of tokens produced by the Tokenizer and produces a parsed syntax tree.

###### Arguments:

- error_level: The desired error level. Default: ErrorLevel.IMMEDIATE
- error_message_context: The amount of context to capture from a query string when displaying the error message (in number of characters). Default: 100
- max_errors: Maximum number of error messages to include in a raised ParseError. This is only relevant if error_level is ErrorLevel.RAISE. Default: 3

BITWISE = {<TokenType.AMP: 'AMP'>: <class 'sqlglot.expressions.BitwiseAnd'>, <TokenType.CARET: 'CARET'>: <class 'sqlglot.expressions.BitwiseXor'>, <TokenType.PIPE: 'PIPE'>: <class 'sqlglot.expressions.BitwiseOr'>, <TokenType.TILDA: 'TILDA'>: <class 'sqlglot.expressions.RegexpLike'>}
FUNCTIONS_WITH_ALIASED_ARGS = {'STRUCT', 'STRUCT_PACK'}
FUNCTIONS = {'ABS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Abs'>>, 'ADD_MONTHS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.AddMonths'>>, 'ANONYMOUS_AGG_FUNC': <bound method Func.from_arg_list of <class 'sqlglot.expressions.AnonymousAggFunc'>>, 'ANY_VALUE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.AnyValue'>>, 'APPROX_DISTINCT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ApproxDistinct'>>, 'APPROX_COUNT_DISTINCT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ApproxDistinct'>>, 'APPROX_QUANTILE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ApproxQuantile'>>, 'APPROX_TOP_K': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ApproxTopK'>>, 'ARG_MAX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArgMax'>>, 'ARGMAX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArgMax'>>, 'MAX_BY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArgMax'>>, 'ARG_MIN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArgMin'>>, 'ARGMIN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArgMin'>>, 'MIN_BY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArgMin'>>, 'ARRAY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Array'>>, 'ARRAY_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayAgg'>>, 'ARRAY_ALL': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayAll'>>, 'ARRAY_ANY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayAny'>>, 'ARRAY_CONCAT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayConcat'>>, 'ARRAY_CAT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayConcat'>>, 'ARRAY_CONTAINS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayContains'>>, 'FILTER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayFilter'>>, 'ARRAY_FILTER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayFilter'>>, 'ARRAY_JOIN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayJoin'>>, 'ARRAY_OVERLAPS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayOverlaps'>>, 'ARRAY_SIZE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArraySize'>>, 'ARRAY_LENGTH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArraySize'>>, 'ARRAY_SORT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.SortArray'>>, 'ARRAY_SUM': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArraySum'>>, 'ARRAY_UNION_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayUnionAgg'>>, 'ARRAY_UNIQUE_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayUniqueAgg'>>, 'AVG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Avg'>>, 'CASE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Case'>>, 'CAST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Cast'>>, 'CAST_TO_STR_TYPE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CastToStrType'>>, 'CBRT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Cbrt'>>, 'CEIL': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Ceil'>>, 'CEILING': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Ceil'>>, 'CHR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Chr'>>, 'CHAR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Chr'>>, 'COALESCE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Coalesce'>>, 'IFNULL': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Coalesce'>>, 'NVL': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Coalesce'>>, 'COLLATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Collate'>>, 'COMBINED_AGG_FUNC': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CombinedAggFunc'>>, 'COMBINED_PARAMETERIZED_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CombinedParameterizedAgg'>>, 'CONCAT': <function Parser.<lambda>>, 'CONCAT_WS': <function Parser.<lambda>>, 'CONNECT_BY_ROOT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ConnectByRoot'>>, 'CONVERT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Convert'>>, 'COUNT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Count'>>, 'COUNT_IF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CountIf'>>, 'COUNTIF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CountIf'>>, 'CURRENT_DATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CurrentDate'>>, 'CURRENT_DATETIME': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CurrentDatetime'>>, 'CURRENT_TIME': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CurrentTime'>>, 'CURRENT_TIMESTAMP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CurrentTimestamp'>>, 'CURRENT_USER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.CurrentUser'>>, 'DATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Date'>>, 'DATE_ADD': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DateAdd'>>, 'DATEDIFF': <function _build_date_diff>, 'DATE_DIFF': <function _build_date_diff>, 'DATE_FROM_PARTS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DateFromParts'>>, 'DATEFROMPARTS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DateFromParts'>>, 'DATE_STR_TO_DATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DateStrToDate'>>, 'DATE_SUB': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DateSub'>>, 'DATE_TO_DATE_STR': <function Parser.<lambda>>, 'DATE_TO_DI': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DateToDi'>>, 'DATE_TRUNC': <function date_trunc_to_time>, 'DATETIME_ADD': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DatetimeAdd'>>, 'DATETIME_DIFF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DatetimeDiff'>>, 'DATETIME_SUB': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DatetimeSub'>>, 'DATETIME_TRUNC': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DatetimeTrunc'>>, 'DAY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Day'>>, 'DAY_OF_MONTH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DayOfMonth'>>, 'DAYOFMONTH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DayOfMonth'>>, 'DAY_OF_WEEK': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DayOfWeek'>>, 'DAYOFWEEK': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DayOfWeek'>>, 'DAY_OF_YEAR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DayOfYear'>>, 'DAYOFYEAR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DayOfYear'>>, 'DECODE': <function DuckDB.Parser.<lambda>>, 'DI_TO_DATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.DiToDate'>>, 'ENCODE': <function DuckDB.Parser.<lambda>>, 'EXP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Exp'>>, 'EXPLODE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Explode'>>, 'EXPLODE_OUTER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ExplodeOuter'>>, 'EXTRACT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Extract'>>, 'FIRST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.First'>>, 'FIRST_VALUE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.FirstValue'>>, 'FLATTEN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Flatten'>>, 'FLOOR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Floor'>>, 'FROM_BASE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.FromBase'>>, 'FROM_BASE64': <bound method Func.from_arg_list of <class 'sqlglot.expressions.FromBase64'>>, 'GENERATE_SERIES': <function _build_generate_series.<locals>._builder>, 'GREATEST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Greatest'>>, 'GROUP_CONCAT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.GroupConcat'>>, 'HEX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Hex'>>, 'HLL': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Hll'>>, 'IF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.If'>>, 'IIF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.If'>>, 'INITCAP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Initcap'>>, 'IS_INF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.IsInf'>>, 'ISINF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.IsInf'>>, 'IS_NAN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.IsNan'>>, 'ISNAN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.IsNan'>>, 'J_S_O_N_ARRAY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONArray'>>, 'J_S_O_N_ARRAY_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONArrayAgg'>>, 'JSON_ARRAY_CONTAINS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONArrayContains'>>, 'JSONB_EXTRACT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONBExtract'>>, 'JSONB_EXTRACT_SCALAR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONBExtractScalar'>>, 'JSON_EXTRACT': <function build_extract_json_with_path.<locals>._builder>, 'JSON_EXTRACT_SCALAR': <function build_extract_json_with_path.<locals>._builder>, 'JSON_FORMAT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONFormat'>>, 'J_S_O_N_OBJECT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONObject'>>, 'J_S_O_N_OBJECT_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONObjectAgg'>>, 'J_S_O_N_TABLE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.JSONTable'>>, 'LAG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Lag'>>, 'LAST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Last'>>, 'LAST_DAY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LastDay'>>, 'LAST_DAY_OF_MONTH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LastDay'>>, 'LAST_VALUE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LastValue'>>, 'LEAD': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Lead'>>, 'LEAST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Least'>>, 'LEFT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Left'>>, 'LENGTH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Length'>>, 'LEN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Length'>>, 'LEVENSHTEIN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Levenshtein'>>, 'LN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Ln'>>, 'LOG': <function build_logarithm>, 'LOG10': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Log10'>>, 'LOG2': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Log2'>>, 'LOGICAL_AND': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LogicalAnd'>>, 'BOOL_AND': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LogicalAnd'>>, 'BOOLAND_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LogicalAnd'>>, 'LOGICAL_OR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LogicalOr'>>, 'BOOL_OR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LogicalOr'>>, 'BOOLOR_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.LogicalOr'>>, 'LOWER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Lower'>>, 'LCASE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Lower'>>, 'MD5': <bound method Func.from_arg_list of <class 'sqlglot.expressions.MD5'>>, 'MD5_DIGEST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.MD5Digest'>>, 'MAP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Map'>>, 'MAP_FROM_ENTRIES': <bound method Func.from_arg_list of <class 'sqlglot.expressions.MapFromEntries'>>, 'MATCH_AGAINST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.MatchAgainst'>>, 'MAX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Max'>>, 'MIN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Min'>>, 'MONTH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Month'>>, 'MONTHS_BETWEEN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.MonthsBetween'>>, 'NEXT_VALUE_FOR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.NextValueFor'>>, 'NTH_VALUE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.NthValue'>>, 'NULLIF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Nullif'>>, 'NUMBER_TO_STR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.NumberToStr'>>, 'NVL2': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Nvl2'>>, 'OPEN_J_S_O_N': <bound method Func.from_arg_list of <class 'sqlglot.expressions.OpenJSON'>>, 'PARAMETERIZED_AGG': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ParameterizedAgg'>>, 'PARSE_JSON': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ParseJSON'>>, 'JSON_PARSE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ParseJSON'>>, 'PERCENTILE_CONT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.PercentileCont'>>, 'PERCENTILE_DISC': <bound method Func.from_arg_list of <class 'sqlglot.expressions.PercentileDisc'>>, 'POSEXPLODE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Posexplode'>>, 'POSEXPLODE_OUTER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.PosexplodeOuter'>>, 'POWER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Pow'>>, 'POW': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Pow'>>, 'PREDICT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Predict'>>, 'QUANTILE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Quantile'>>, 'RAND': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Rand'>>, 'RANDOM': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Rand'>>, 'RANDN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Randn'>>, 'RANGE_N': <bound method Func.from_arg_list of <class 'sqlglot.expressions.RangeN'>>, 'READ_CSV': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ReadCSV'>>, 'REDUCE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Reduce'>>, 'REGEXP_EXTRACT': <function DuckDB.Parser.<lambda>>, 'REGEXP_I_LIKE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.RegexpILike'>>, 'REGEXP_LIKE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.RegexpLike'>>, 'REGEXP_REPLACE': <function DuckDB.Parser.<lambda>>, 'REGEXP_SPLIT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.RegexpSplit'>>, 'REPEAT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Repeat'>>, 'RIGHT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Right'>>, 'ROUND': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Round'>>, 'ROW_NUMBER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.RowNumber'>>, 'SHA': <bound method Func.from_arg_list of <class 'sqlglot.expressions.SHA'>>, 'SHA1': <bound method Func.from_arg_list of <class 'sqlglot.expressions.SHA'>>, 'SHA2': <bound method Func.from_arg_list of <class 'sqlglot.expressions.SHA2'>>, 'SAFE_DIVIDE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.SafeDivide'>>, 'SIGN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Sign'>>, 'SIGNUM': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Sign'>>, 'SORT_ARRAY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.SortArray'>>, 'SPLIT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Split'>>, 'SQRT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Sqrt'>>, 'STANDARD_HASH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StandardHash'>>, 'STAR_MAP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StarMap'>>, 'STARTS_WITH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StartsWith'>>, 'STARTSWITH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StartsWith'>>, 'STDDEV': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Stddev'>>, 'STDDEV_POP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StddevPop'>>, 'STDDEV_SAMP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StddevSamp'>>, 'STR_POSITION': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StrPosition'>>, 'STR_TO_DATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StrToDate'>>, 'STR_TO_MAP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StrToMap'>>, 'STR_TO_TIME': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StrToTime'>>, 'STR_TO_UNIX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StrToUnix'>>, 'STRUCT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Struct'>>, 'STRUCT_EXTRACT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.StructExtract'>>, 'STUFF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Stuff'>>, 'INSERT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Stuff'>>, 'SUBSTRING': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Substring'>>, 'SUM': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Sum'>>, 'TIME_ADD': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeAdd'>>, 'TIME_DIFF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeDiff'>>, 'TIME_FROM_PARTS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeFromParts'>>, 'TIMEFROMPARTS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeFromParts'>>, 'TIME_STR_TO_DATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeStrToDate'>>, 'TIME_STR_TO_TIME': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeStrToTime'>>, 'TIME_STR_TO_UNIX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeStrToUnix'>>, 'TIME_SUB': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeSub'>>, 'TIME_TO_STR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeToStr'>>, 'TIME_TO_TIME_STR': <function Parser.<lambda>>, 'TIME_TO_UNIX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeToUnix'>>, 'TIME_TRUNC': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeTrunc'>>, 'TIMESTAMP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Timestamp'>>, 'TIMESTAMP_ADD': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimestampAdd'>>, 'TIMESTAMPDIFF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimestampDiff'>>, 'TIMESTAMP_DIFF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimestampDiff'>>, 'TIMESTAMP_FROM_PARTS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimestampFromParts'>>, 'TIMESTAMPFROMPARTS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimestampFromParts'>>, 'TIMESTAMP_SUB': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimestampSub'>>, 'TIMESTAMP_TRUNC': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimestampTrunc'>>, 'TO_ARRAY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ToArray'>>, 'TO_BASE64': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ToBase64'>>, 'TO_CHAR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ToChar'>>, 'TO_DAYS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ToDays'>>, 'TRANSFORM': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Transform'>>, 'TRIM': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Trim'>>, 'TRY_CAST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TryCast'>>, 'TS_OR_DI_TO_DI': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TsOrDiToDi'>>, 'TS_OR_DS_ADD': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TsOrDsAdd'>>, 'TS_OR_DS_DIFF': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TsOrDsDiff'>>, 'TS_OR_DS_TO_DATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TsOrDsToDate'>>, 'TS_OR_DS_TO_DATE_STR': <function Parser.<lambda>>, 'TS_OR_DS_TO_TIME': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TsOrDsToTime'>>, 'UNHEX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Unhex'>>, 'UNIX_DATE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.UnixDate'>>, 'UNIX_TO_STR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.UnixToStr'>>, 'UNIX_TO_TIME': <bound method Func.from_arg_list of <class 'sqlglot.expressions.UnixToTime'>>, 'UNIX_TO_TIME_STR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.UnixToTimeStr'>>, 'UPPER': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Upper'>>, 'UCASE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Upper'>>, 'VAR_MAP': <function build_var_map>, 'VARIANCE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Variance'>>, 'VARIANCE_SAMP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Variance'>>, 'VAR_SAMP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Variance'>>, 'VARIANCE_POP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.VariancePop'>>, 'VAR_POP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.VariancePop'>>, 'WEEK': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Week'>>, 'WEEK_OF_YEAR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.WeekOfYear'>>, 'WEEKOFYEAR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.WeekOfYear'>>, 'WHEN': <bound method Func.from_arg_list of <class 'sqlglot.expressions.When'>>, 'X_M_L_TABLE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.XMLTable'>>, 'XOR': <function binary_from_function.<locals>.<lambda>>, 'YEAR': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Year'>>, 'GLOB': <function Parser.<lambda>>, 'JSON_EXTRACT_PATH_TEXT': <function build_extract_json_with_path.<locals>._builder>, 'LIKE': <function build_like>, 'ARRAY_HAS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayContains'>>, 'ARRAY_REVERSE_SORT': <function _build_sort_array_desc>, 'DATETRUNC': <function date_trunc_to_time>, 'EPOCH': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeToUnix'>>, 'EPOCH_MS': <function DuckDB.Parser.<lambda>>, 'JSON': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ParseJSON'>>, 'JSON_EXTRACT_PATH': <function build_extract_json_with_path.<locals>._builder>, 'JSON_EXTRACT_STRING': <function build_extract_json_with_path.<locals>._builder>, 'LIST_HAS': <bound method Func.from_arg_list of <class 'sqlglot.expressions.ArrayContains'>>, 'LIST_REVERSE_SORT': <function _build_sort_array_desc>, 'LIST_SORT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.SortArray'>>, 'LIST_VALUE': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Array'>>, 'MAKE_TIME': <bound method Func.from_arg_list of <class 'sqlglot.expressions.TimeFromParts'>>, 'MAKE_TIMESTAMP': <function _build_make_timestamp>, 'MEDIAN': <function DuckDB.Parser.<lambda>>, 'QUANTILE_CONT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.PercentileCont'>>, 'QUANTILE_DISC': <bound method Func.from_arg_list of <class 'sqlglot.expressions.PercentileDisc'>>, 'REGEXP_MATCHES': <bound method Func.from_arg_list of <class 'sqlglot.expressions.RegexpLike'>>, 'STRFTIME': <function build_formatted_time.<locals>._builder>, 'STRING_SPLIT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Split'>>, 'STRING_SPLIT_REGEX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.RegexpSplit'>>, 'STRING_TO_ARRAY': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Split'>>, 'STRPTIME': <function build_formatted_time.<locals>._builder>, 'STRUCT_PACK': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Struct'>>, 'STR_SPLIT': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Split'>>, 'STR_SPLIT_REGEX': <bound method Func.from_arg_list of <class 'sqlglot.expressions.RegexpSplit'>>, 'TO_TIMESTAMP': <bound method Func.from_arg_list of <class 'sqlglot.expressions.UnixToTime'>>, 'UNNEST': <bound method Func.from_arg_list of <class 'sqlglot.expressions.Explode'>>, 'RANGE': <function _build_generate_series.<locals>._builder>}
FUNCTION_PARSERS = {'CAST': <function Parser.<lambda>>, 'CONVERT': <function Parser.<lambda>>, 'EXTRACT': <function Parser.<lambda>>, 'JSON_OBJECT': <function Parser.<lambda>>, 'JSON_OBJECTAGG': <function Parser.<lambda>>, 'JSON_TABLE': <function Parser.<lambda>>, 'MATCH': <function Parser.<lambda>>, 'OPENJSON': <function Parser.<lambda>>, 'POSITION': <function Parser.<lambda>>, 'PREDICT': <function Parser.<lambda>>, 'SAFE_CAST': <function Parser.<lambda>>, 'STRING_AGG': <function Parser.<lambda>>, 'SUBSTRING': <function Parser.<lambda>>, 'TRIM': <function Parser.<lambda>>, 'TRY_CAST': <function Parser.<lambda>>, 'TRY_CONVERT': <function Parser.<lambda>>}
TABLE_ALIAS_TOKENS = {<TokenType.VAR: 'VAR'>, <TokenType.PROCEDURE: 'PROCEDURE'>, <TokenType.FALSE: 'FALSE'>, <TokenType.VARCHAR: 'VARCHAR'>, <TokenType.SMALLINT: 'SMALLINT'>, <TokenType.UINT: 'UINT'>, <TokenType.ISNULL: 'ISNULL'>, <TokenType.INT256: 'INT256'>, <TokenType.ROWS: 'ROWS'>, <TokenType.IPV6: 'IPV6'>, <TokenType.DATETIME64: 'DATETIME64'>, <TokenType.ROW: 'ROW'>, <TokenType.IS: 'IS'>, <TokenType.NEXT: 'NEXT'>, <TokenType.UMEDIUMINT: 'UMEDIUMINT'>, <TokenType.ARRAY: 'ARRAY'>, <TokenType.IPADDRESS: 'IPADDRESS'>, <TokenType.DATETIME: 'DATETIME'>, <TokenType.ASC: 'ASC'>, <TokenType.TIMESTAMP_S: 'TIMESTAMP_S'>, <TokenType.AGGREGATEFUNCTION: 'AGGREGATEFUNCTION'>, <TokenType.COMMAND: 'COMMAND'>, <TokenType.REFERENCES: 'REFERENCES'>, <TokenType.REPLACE: 'REPLACE'>, <TokenType.TRUE: 'TRUE'>, <TokenType.IPPREFIX: 'IPPREFIX'>, <TokenType.TEXT: 'TEXT'>, <TokenType.BIGINT: 'BIGINT'>, <TokenType.NESTED: 'NESTED'>, <TokenType.KILL: 'KILL'>, <TokenType.BINARY: 'BINARY'>, <TokenType.TIMESTAMPLTZ: 'TIMESTAMPLTZ'>, <TokenType.PSEUDO_TYPE: 'PSEUDO_TYPE'>, <TokenType.PRAGMA: 'PRAGMA'>, <TokenType.DESCRIBE: 'DESCRIBE'>, <TokenType.SET: 'SET'>, <TokenType.TIMESTAMP_MS: 'TIMESTAMP_MS'>, <TokenType.CASE: 'CASE'>, <TokenType.RANGE: 'RANGE'>, <TokenType.DATEMULTIRANGE: 'DATEMULTIRANGE'>, <TokenType.NULL: 'NULL'>, <TokenType.PIVOT: 'PIVOT'>, <TokenType.ENUM16: 'ENUM16'>, <TokenType.UNPIVOT: 'UNPIVOT'>, <TokenType.KEEP: 'KEEP'>, <TokenType.ORDINALITY: 'ORDINALITY'>, <TokenType.FINAL: 'FINAL'>, <TokenType.INT8MULTIRANGE: 'INT8MULTIRANGE'>, <TokenType.ANY: 'ANY'>, <TokenType.ENUM: 'ENUM'>, <TokenType.SETTINGS: 'SETTINGS'>, <TokenType.VOLATILE: 'VOLATILE'>, <TokenType.TSRANGE: 'TSRANGE'>, <TokenType.IMAGE: 'IMAGE'>, <TokenType.LONGTEXT: 'LONGTEXT'>, <TokenType.VARIANT: 'VARIANT'>, <TokenType.STRUCT: 'STRUCT'>, <TokenType.AUTO_INCREMENT: 'AUTO_INCREMENT'>, <TokenType.MONEY: 'MONEY'>, <TokenType.ALL: 'ALL'>, <TokenType.VIEW: 'VIEW'>, <TokenType.SMALLSERIAL: 'SMALLSERIAL'>, <TokenType.TIMETZ: 'TIMETZ'>, <TokenType.MERGE: 'MERGE'>, <TokenType.TINYBLOB: 'TINYBLOB'>, <TokenType.HSTORE: 'HSTORE'>, <TokenType.OVERWRITE: 'OVERWRITE'>, <TokenType.DATE32: 'DATE32'>, <TokenType.USERDEFINED: 'USERDEFINED'>, <TokenType.BIT: 'BIT'>, <TokenType.CHAR: 'CHAR'>, <TokenType.MODEL: 'MODEL'>, <TokenType.TSTZMULTIRANGE: 'TSTZMULTIRANGE'>, <TokenType.SHOW: 'SHOW'>, <TokenType.TIMESTAMP: 'TIMESTAMP'>, <TokenType.UDECIMAL: 'UDECIMAL'>, <TokenType.INT8RANGE: 'INT8RANGE'>, <TokenType.TIME: 'TIME'>, <TokenType.LONGBLOB: 'LONGBLOB'>, <TokenType.SERIAL: 'SERIAL'>, <TokenType.RECURSIVE: 'RECURSIVE'>, <TokenType.TOP: 'TOP'>, <TokenType.FIXEDSTRING: 'FIXEDSTRING'>, <TokenType.STORAGE_INTEGRATION: 'STORAGE_INTEGRATION'>, <TokenType.CURRENT_DATE: 'CURRENT_DATE'>, <TokenType.NULLABLE: 'NULLABLE'>, <TokenType.CURRENT_TIMESTAMP: 'CURRENT_TIMESTAMP'>, <TokenType.DATABASE: 'DATABASE'>, <TokenType.BIGDECIMAL: 'BIGDECIMAL'>, <TokenType.IPV4: 'IPV4'>, <TokenType.BEGIN: 'BEGIN'>, <TokenType.DELETE: 'DELETE'>, <TokenType.TINYINT: 'TINYINT'>, <TokenType.DICTIONARY: 'DICTIONARY'>, <TokenType.SIMPLEAGGREGATEFUNCTION: 'SIMPLEAGGREGATEFUNCTION'>, <TokenType.CONSTRAINT: 'CONSTRAINT'>, <TokenType.BOOLEAN: 'BOOLEAN'>, <TokenType.USMALLINT: 'USMALLINT'>, <TokenType.UNKNOWN: 'UNKNOWN'>, <TokenType.CURRENT_TIME: 'CURRENT_TIME'>, <TokenType.OPERATOR: 'OPERATOR'>, <TokenType.UPDATE: 'UPDATE'>, <TokenType.INT128: 'INT128'>, <TokenType.PARTITION: 'PARTITION'>, <TokenType.UINT256: 'UINT256'>, <TokenType.SOME: 'SOME'>, <TokenType.BPCHAR: 'BPCHAR'>, <TokenType.TINYTEXT: 'TINYTEXT'>, <TokenType.TSTZRANGE: 'TSTZRANGE'>, <TokenType.DATERANGE: 'DATERANGE'>, <TokenType.CACHE: 'CACHE'>, <TokenType.VARBINARY: 'VARBINARY'>, <TokenType.JSON: 'JSON'>, <TokenType.YEAR: 'YEAR'>, <TokenType.ENUM8: 'ENUM8'>, <TokenType.PERCENT: 'PERCENT'>, <TokenType.SCHEMA: 'SCHEMA'>, <TokenType.GEOGRAPHY: 'GEOGRAPHY'>, <TokenType.NVARCHAR: 'NVARCHAR'>, <TokenType.FOREIGN_KEY: 'FOREIGN_KEY'>, <TokenType.REFRESH: 'REFRESH'>, <TokenType.USE: 'USE'>, <TokenType.DESC: 'DESC'>, <TokenType.SMALLMONEY: 'SMALLMONEY'>, <TokenType.NCHAR: 'NCHAR'>, <TokenType.FORMAT: 'FORMAT'>, <TokenType.HLLSKETCH: 'HLLSKETCH'>, <TokenType.DECIMAL: 'DECIMAL'>, <TokenType.COLLATE: 'COLLATE'>, <TokenType.TIMESTAMPTZ: 'TIMESTAMPTZ'>, <TokenType.EXISTS: 'EXISTS'>, <TokenType.ROWVERSION: 'ROWVERSION'>, <TokenType.NUMRANGE: 'NUMRANGE'>, <TokenType.INT4RANGE: 'INT4RANGE'>, <TokenType.UNIQUEIDENTIFIER: 'UNIQUEIDENTIFIER'>, <TokenType.UNIQUE: 'UNIQUE'>, <TokenType.JSONB: 'JSONB'>, <TokenType.INT: 'INT'>, <TokenType.INDEX: 'INDEX'>, <TokenType.DIV: 'DIV'>, <TokenType.MEDIUMINT: 'MEDIUMINT'>, <TokenType.FLOAT: 'FLOAT'>, <TokenType.DATE: 'DATE'>, <TokenType.COLUMN: 'COLUMN'>, <TokenType.FUNCTION: 'FUNCTION'>, <TokenType.EXECUTE: 'EXECUTE'>, <TokenType.UTINYINT: 'UTINYINT'>, <TokenType.INET: 'INET'>, <TokenType.UBIGINT: 'UBIGINT'>, <TokenType.INTERVAL: 'INTERVAL'>, <TokenType.TABLE: 'TABLE'>, <TokenType.UINT128: 'UINT128'>, <TokenType.MEDIUMBLOB: 'MEDIUMBLOB'>, <TokenType.CURRENT_USER: 'CURRENT_USER'>, <TokenType.COMMENT: 'COMMENT'>, <TokenType.XML: 'XML'>, <TokenType.UUID: 'UUID'>, <TokenType.GEOMETRY: 'GEOMETRY'>, <TokenType.OBJECT_IDENTIFIER: 'OBJECT_IDENTIFIER'>, <TokenType.TIMESTAMP_NS: 'TIMESTAMP_NS'>, <TokenType.BIGSERIAL: 'BIGSERIAL'>, <TokenType.DOUBLE: 'DOUBLE'>, <TokenType.NUMMULTIRANGE: 'NUMMULTIRANGE'>, <TokenType.OBJECT: 'OBJECT'>, <TokenType.LOAD: 'LOAD'>, <TokenType.MEDIUMTEXT: 'MEDIUMTEXT'>, <TokenType.COMMIT: 'COMMIT'>, <TokenType.FIRST: 'FIRST'>, <TokenType.MAP: 'MAP'>, <TokenType.TRUNCATE: 'TRUNCATE'>, <TokenType.OVERLAPS: 'OVERLAPS'>, <TokenType.LOWCARDINALITY: 'LOWCARDINALITY'>, <TokenType.END: 'END'>, <TokenType.FILTER: 'FILTER'>, <TokenType.ESCAPE: 'ESCAPE'>, <TokenType.TEMPORARY: 'TEMPORARY'>, <TokenType.INT4MULTIRANGE: 'INT4MULTIRANGE'>, <TokenType.SUPER: 'SUPER'>, <TokenType.CURRENT_DATETIME: 'CURRENT_DATETIME'>, <TokenType.TSMULTIRANGE: 'TSMULTIRANGE'>, <TokenType.DEFAULT: 'DEFAULT'>}
PLACEHOLDER_PARSERS = {<TokenType.PLACEHOLDER: 'PLACEHOLDER'>: <function Parser.<lambda>>, <TokenType.PARAMETER: 'PARAMETER'>: <function DuckDB.Parser.<lambda>>, <TokenType.COLON: 'COLON'>: <function Parser.<lambda>>}
SHOW_TRIE: Dict = {}
SET_TRIE: Dict = {'GLOBAL': {0: True}, 'LOCAL': {0: True}, 'SESSION': {0: True}, 'TRANSACTION': {0: True}}

##### Inherited Members

sqlglot.parser.Parser
  Parser
  NO_PAREN_FUNCTIONS
  STRUCT_TYPE_TOKENS
  NESTED_TYPE_TOKENS
  ENUM_TYPE_TOKENS
  AGGREGATE_TYPE_TOKENS
  TYPE_TOKENS
  SIGNED_TO_UNSIGNED_TYPE_TOKEN
  SUBQUERY_PREDICATES
  RESERVED_TOKENS
  DB_CREATABLES
  CREATABLES
  ID_VAR_TOKENS
  INTERVAL_VARS
  COMMENT_TABLE_ALIAS_TOKENS
  UPDATE_ALIAS_TOKENS
  TRIM_TYPES
  FUNC_TOKENS
  CONJUNCTION
  EQUALITY
  COMPARISON
  TERM
  FACTOR
  EXPONENT
  TIMES
  TIMESTAMPS
  SET_OPERATIONS
  JOIN_METHODS
  JOIN_SIDES
  JOIN_KINDS
  JOIN_HINTS
  LAMBDAS
  COLUMN_OPERATORS
  EXPRESSION_PARSERS
  STATEMENT_PARSERS
  UNARY_PARSERS
  PRIMARY_PARSERS
  RANGE_PARSERS
  PROPERTY_PARSERS
  CONSTRAINT_PARSERS
  ALTER_PARSERS
  SCHEMA_UNNAMED_CONSTRAINTS
  NO_PAREN_FUNCTION_PARSERS
  INVALID_FUNC_NAME_TOKENS
  KEY_VALUE_DEFINITIONS
  QUERY_MODIFIER_PARSERS
  SET_PARSERS
  SHOW_PARSERS
  TYPE_LITERAL_PARSERS
  DDL_SELECT_TOKENS
  PRE_VOLATILE_TOKENS
  TRANSACTION_KIND
  TRANSACTION_CHARACTERISTICS
  USABLES
  INSERT_ALTERNATIVES
  CLONE_KEYWORDS
  HISTORICAL_DATA_KIND
  OPCLASS_FOLLOW_KEYWORDS
  OPTYPE_FOLLOW_TOKENS
  TABLE_INDEX_HINT_TOKENS
  WINDOW_ALIAS_TOKENS
  WINDOW_BEFORE_PAREN_TOKENS
  WINDOW_SIDES
  JSON_KEY_VALUE_SEPARATOR_TOKENS
  FETCH_TOKENS
  ADD_CONSTRAINT_TOKENS
  DISTINCT_TOKENS
  NULL_TOKENS
  UNNEST_OFFSET_ALIAS_TOKENS
  STRICT_CAST
  PREFIXED_PIVOT_COLUMNS
  IDENTIFY_PIVOT_STRINGS
  LOG_DEFAULTS_TO_LN
  ALTER_TABLE_ADD_REQUIRED_FOR_EACH_COLUMN
  TABLESAMPLE_CSV
  SET_REQUIRES_ASSIGNMENT_DELIMITER
  TRIM_PATTERN_FIRST
  STRING_ALIASES
  MODIFIERS_ATTACHED_TO_UNION
  UNION_MODIFIERS
  NO_PAREN_IF_COMMANDS
  JSON_ARROWS_REQUIRE_JSON_TYPE
  VALUES_FOLLOWED_BY_PAREN
  SUPPORTS_IMPLICIT_UNNEST
  error_level
  error_message_context
  max_errors
  dialect
  reset
  parse
  parse_into
  check_errors
  raise_error
  expression
  validate_expression
  errors
  sql

class DuckDB.Generator(sqlglot.generator.Generator): View Source

    329    class Generator(generator.Generator):
    330        PARAMETER_TOKEN = "$"
    331        NAMED_PLACEHOLDER_TOKEN = "$"
    332        JOIN_HINTS = False
    333        TABLE_HINTS = False
    334        QUERY_HINTS = False
    335        LIMIT_FETCH = "LIMIT"
    336        STRUCT_DELIMITER = ("(", ")")
    337        RENAME_TABLE_WITH_DB = False
    338        NVL2_SUPPORTED = False
    339        SEMI_ANTI_JOIN_WITH_SIDE = False
    340        TABLESAMPLE_KEYWORDS = "USING SAMPLE"
    341        TABLESAMPLE_SEED_KEYWORD = "REPEATABLE"
    342        LAST_DAY_SUPPORTS_DATE_PART = False
    343        JSON_KEY_VALUE_PAIR_SEP = ","
    344        IGNORE_NULLS_IN_FUNC = True
    345        JSON_PATH_BRACKETED_KEY_SUPPORTED = False
    346        SUPPORTS_CREATE_TABLE_LIKE = False
    347        MULTI_ARG_DISTINCT = False
    348        CAN_IMPLEMENT_ARRAY_ANY = True
    349
    350        TRANSFORMS = {
    351            **generator.Generator.TRANSFORMS,
    352            exp.ApproxDistinct: approx_count_distinct_sql,
    353            exp.Array: lambda self, e: (
    354                self.func("ARRAY", e.expressions[0])
    355                if e.expressions and e.expressions[0].find(exp.Select)
    356                else inline_array_sql(self, e)
    357            ),
    358            exp.ArrayFilter: rename_func("LIST_FILTER"),
    359            exp.ArraySize: rename_func("ARRAY_LENGTH"),
    360            exp.ArgMax: arg_max_or_min_no_count("ARG_MAX"),
    361            exp.ArgMin: arg_max_or_min_no_count("ARG_MIN"),
    362            exp.ArraySort: _array_sort_sql,
    363            exp.ArraySum: rename_func("LIST_SUM"),
    364            exp.BitwiseXor: rename_func("XOR"),
    365            exp.CommentColumnConstraint: no_comment_column_constraint_sql,
    366            exp.CurrentDate: lambda *_: "CURRENT_DATE",
    367            exp.CurrentTime: lambda *_: "CURRENT_TIME",
    368            exp.CurrentTimestamp: lambda *_: "CURRENT_TIMESTAMP",
    369            exp.DayOfMonth: rename_func("DAYOFMONTH"),
    370            exp.DayOfWeek: rename_func("DAYOFWEEK"),
    371            exp.DayOfYear: rename_func("DAYOFYEAR"),
    372            exp.DataType: _datatype_sql,
    373            exp.Date: _date_sql,
    374            exp.DateAdd: _date_delta_sql,
    375            exp.DateFromParts: rename_func("MAKE_DATE"),
    376            exp.DateSub: _date_delta_sql,
    377            exp.DateDiff: lambda self, e: self.func(
    378                "DATE_DIFF", f"'{e.args.get('unit') or 'DAY'}'", e.expression, e.this
    379            ),
    380            exp.DateStrToDate: datestrtodate_sql,
    381            exp.DateToDi: lambda self,
    382            e: f"CAST(STRFTIME({self.sql(e, 'this')}, {DuckDB.DATEINT_FORMAT}) AS INT)",
    383            exp.Decode: lambda self, e: encode_decode_sql(self, e, "DECODE", replace=False),
    384            exp.DiToDate: lambda self,
    385            e: f"CAST(STRPTIME(CAST({self.sql(e, 'this')} AS TEXT), {DuckDB.DATEINT_FORMAT}) AS DATE)",
    386            exp.Encode: lambda self, e: encode_decode_sql(self, e, "ENCODE", replace=False),
    387            exp.Explode: rename_func("UNNEST"),
    388            exp.IntDiv: lambda self, e: self.binary(e, "//"),
    389            exp.IsInf: rename_func("ISINF"),
    390            exp.IsNan: rename_func("ISNAN"),
    391            exp.JSONExtract: arrow_json_extract_sql,
    392            exp.JSONExtractScalar: arrow_json_extract_sql,
    393            exp.JSONFormat: _json_format_sql,
    394            exp.LogicalOr: rename_func("BOOL_OR"),
    395            exp.LogicalAnd: rename_func("BOOL_AND"),
    396            exp.MonthsBetween: lambda self, e: self.func(
    397                "DATEDIFF",
    398                "'month'",
    399                exp.cast(e.expression, "timestamp", copy=True),
    400                exp.cast(e.this, "timestamp", copy=True),
    401            ),
    402            exp.ParseJSON: rename_func("JSON"),
    403            exp.PercentileCont: _rename_unless_within_group("PERCENTILE_CONT", "QUANTILE_CONT"),
    404            exp.PercentileDisc: _rename_unless_within_group("PERCENTILE_DISC", "QUANTILE_DISC"),
    405            # DuckDB doesn't allow qualified columns inside of PIVOT expressions.
    406            # See: https://github.com/duckdb/duckdb/blob/671faf92411182f81dce42ac43de8bfb05d9909e/src/planner/binder/tableref/bind_pivot.cpp#L61-L62
    407            exp.Pivot: transforms.preprocess([transforms.unqualify_columns]),
    408            exp.RegexpExtract: regexp_extract_sql,
    409            exp.RegexpReplace: lambda self, e: self.func(
    410                "REGEXP_REPLACE",
    411                e.this,
    412                e.expression,
    413                e.args.get("replacement"),
    414                e.args.get("modifiers"),
    415            ),
    416            exp.RegexpLike: rename_func("REGEXP_MATCHES"),
    417            exp.RegexpSplit: rename_func("STR_SPLIT_REGEX"),
    418            exp.Rand: rename_func("RANDOM"),
    419            exp.SafeDivide: no_safe_divide_sql,
    420            exp.Split: rename_func("STR_SPLIT"),
    421            exp.SortArray: _sort_array_sql,
    422            exp.StrPosition: str_position_sql,
    423            exp.StrToDate: lambda self, e: f"CAST({str_to_time_sql(self, e)} AS DATE)",
    424            exp.StrToTime: str_to_time_sql,
    425            exp.StrToUnix: lambda self, e: self.func(
    426                "EPOCH", self.func("STRPTIME", e.this, self.format_time(e))
    427            ),
    428            exp.Struct: _struct_sql,
    429            exp.Timestamp: no_timestamp_sql,
    430            exp.TimestampDiff: lambda self, e: self.func(
    431                "DATE_DIFF", exp.Literal.string(e.unit), e.expression, e.this
    432            ),
    433            exp.TimestampTrunc: timestamptrunc_sql,
    434            exp.TimeStrToDate: lambda self, e: self.sql(exp.cast(e.this, "date")),
    435            exp.TimeStrToTime: timestrtotime_sql,
    436            exp.TimeStrToUnix: lambda self, e: self.func("EPOCH", exp.cast(e.this, "timestamp")),
    437            exp.TimeToStr: lambda self, e: self.func("STRFTIME", e.this, self.format_time(e)),
    438            exp.TimeToUnix: rename_func("EPOCH"),
    439            exp.TsOrDiToDi: lambda self,
    440            e: f"CAST(SUBSTR(REPLACE(CAST({self.sql(e, 'this')} AS TEXT), '-', ''), 1, 8) AS INT)",
    441            exp.TsOrDsAdd: _ts_or_ds_add_sql,
    442            exp.TsOrDsDiff: lambda self, e: self.func(
    443                "DATE_DIFF",
    444                f"'{e.args.get('unit') or 'DAY'}'",
    445                exp.cast(e.expression, "TIMESTAMP"),
    446                exp.cast(e.this, "TIMESTAMP"),
    447            ),
    448            exp.UnixToStr: lambda self, e: self.func(
    449                "STRFTIME", self.func("TO_TIMESTAMP", e.this), self.format_time(e)
    450            ),
    451            exp.UnixToTime: _unix_to_time_sql,
    452            exp.UnixToTimeStr: lambda self, e: f"CAST(TO_TIMESTAMP({self.sql(e, 'this')}) AS TEXT)",
    453            exp.VariancePop: rename_func("VAR_POP"),
    454            exp.WeekOfYear: rename_func("WEEKOFYEAR"),
    455            exp.Xor: bool_xor_sql,
    456        }
    457
    458        SUPPORTED_JSON_PATH_PARTS = {
    459            exp.JSONPathKey,
    460            exp.JSONPathRoot,
    461            exp.JSONPathSubscript,
    462            exp.JSONPathWildcard,
    463        }
    464
    465        TYPE_MAPPING = {
    466            **generator.Generator.TYPE_MAPPING,
    467            exp.DataType.Type.BINARY: "BLOB",
    468            exp.DataType.Type.CHAR: "TEXT",
    469            exp.DataType.Type.FLOAT: "REAL",
    470            exp.DataType.Type.NCHAR: "TEXT",
    471            exp.DataType.Type.NVARCHAR: "TEXT",
    472            exp.DataType.Type.UINT: "UINTEGER",
    473            exp.DataType.Type.VARBINARY: "BLOB",
    474            exp.DataType.Type.VARCHAR: "TEXT",
    475            exp.DataType.Type.TIMESTAMP_S: "TIMESTAMP_S",
    476            exp.DataType.Type.TIMESTAMP_MS: "TIMESTAMP_MS",
    477            exp.DataType.Type.TIMESTAMP_NS: "TIMESTAMP_NS",
    478        }
    479
    480        STAR_MAPPING = {**generator.Generator.STAR_MAPPING, "except": "EXCLUDE"}
    481
    482        UNWRAPPED_INTERVAL_VALUES = (exp.Column, exp.Literal, exp.Paren)
    483
    484        # DuckDB doesn't generally support CREATE TABLE .. properties
    485        # https://duckdb.org/docs/sql/statements/create_table.html
    486        PROPERTIES_LOCATION = {
    487            prop: exp.Properties.Location.UNSUPPORTED
    488            for prop in generator.Generator.PROPERTIES_LOCATION
    489        }
    490
    491        # There are a few exceptions (e.g. temporary tables) which are supported or
    492        # can be transpiled to DuckDB, so we explicitly override them accordingly
    493        PROPERTIES_LOCATION[exp.LikeProperty] = exp.Properties.Location.POST_SCHEMA
    494        PROPERTIES_LOCATION[exp.TemporaryProperty] = exp.Properties.Location.POST_CREATE
    495
    496        def timefromparts_sql(self, expression: exp.TimeFromParts) -> str:
    497            nano = expression.args.get("nano")
    498            if nano is not None:
    499                expression.set(
    500                    "sec", expression.args["sec"] + nano.pop() / exp.Literal.number(1000000000.0)
    501                )
    502
    503            return rename_func("MAKE_TIME")(self, expression)
    504
    505        def timestampfromparts_sql(self, expression: exp.TimestampFromParts) -> str:
    506            sec = expression.args["sec"]
    507
    508            milli = expression.args.get("milli")
    509            if milli is not None:
    510                sec += milli.pop() / exp.Literal.number(1000.0)
    511
    512            nano = expression.args.get("nano")
    513            if nano is not None:
    514                sec += nano.pop() / exp.Literal.number(1000000000.0)
    515
    516            if milli or nano:
    517                expression.set("sec", sec)
    518
    519            return rename_func("MAKE_TIMESTAMP")(self, expression)
    520
    521        def tablesample_sql(
    522            self,
    523            expression: exp.TableSample,
    524            sep: str = " AS ",
    525            tablesample_keyword: t.Optional[str] = None,
    526        ) -> str:
    527            if not isinstance(expression.parent, exp.Select):
    528                # This sample clause only applies to a single source, not the entire resulting relation
    529                tablesample_keyword = "TABLESAMPLE"
    530
    531            return super().tablesample_sql(
    532                expression, sep=sep, tablesample_keyword=tablesample_keyword
    533            )
    534
    535        def interval_sql(self, expression: exp.Interval) -> str:
    536            multiplier: t.Optional[int] = None
    537            unit = expression.text("unit").lower()
    538
    539            if unit.startswith("week"):
    540                multiplier = 7
    541            if unit.startswith("quarter"):
    542                multiplier = 90
    543
    544            if multiplier:
    545                return f"({multiplier} * {super().interval_sql(exp.Interval(this=expression.this, unit=exp.var('DAY')))})"
    546
    547            return super().interval_sql(expression)
    548
    549        def columndef_sql(self, expression: exp.ColumnDef, sep: str = " ") -> str:
    550            if isinstance(expression.parent, exp.UserDefinedFunction):
    551                return self.sql(expression, "this")
    552            return super().columndef_sql(expression, sep)
    553
    554        def join_sql(self, expression: exp.Join) -> str:
    555            if (
    556                expression.side == "LEFT"
    557                and not expression.args.get("on")
    558                and isinstance(expression.this, exp.Unnest)
    559            ):
    560                # Some dialects support `LEFT JOIN UNNEST(...)` without an explicit ON clause
    561                # DuckDB doesn't, but we can just add a dummy ON clause that is always true
    562                return super().join_sql(expression.on(exp.true()))
    563
    564            return super().join_sql(expression)
    565
    566        def generateseries_sql(self, expression: exp.GenerateSeries) -> str:
    567            # GENERATE_SERIES(a, b) -> [a, b], RANGE(a, b) -> [a, b)
    568            if expression.args.get("is_end_exclusive"):
    569                expression.set("is_end_exclusive", None)
    570                return rename_func("RANGE")(self, expression)
    571
    572            return super().generateseries_sql(expression)

Generator converts a given syntax tree to the corresponding SQL string.

###### Arguments:

- pretty: Whether to format the produced SQL string. Default: False.
- identify: Determines when an identifier should be quoted. Possible values are: False (default): Never quote, except in cases where it's mandatory by the dialect. True or 'always': Always quote. 'safe': Only quote identifiers that are case insensitive.
- normalize: Whether to normalize identifiers to lowercase. Default: False.
- pad: The pad size in a formatted string. Default: 2.
- indent: The indentation size in a formatted string. Default: 2.
- normalize_functions: How to normalize function names. Possible values are: "upper" or True (default): Convert names to uppercase. "lower": Convert names to lowercase. False: Disables function name normalization.
- unsupported_level: Determines the generator's behavior when it encounters unsupported expressions. Default ErrorLevel.WARN.
- max_unsupported: Maximum number of unsupported messages to include in a raised UnsupportedError. This is only relevant if unsupported_level is ErrorLevel.RAISE. Default: 3
- leading_comma: Whether the comma is leading or trailing in select expressions. This is only relevant when generating in pretty mode. Default: False
- max_text_width: The max number of characters in a segment before creating new lines in pretty mode. The default is on the smaller end because the length only represents a segment and not the true line length. Default: 80
- comments: Whether to preserve comments in the output SQL code. Default: True

PARAMETER_TOKEN = '$'
NAMED_PLACEHOLDER_TOKEN = '$'
JOIN_HINTS = False
TABLE_HINTS = False
QUERY_HINTS = False
LIMIT_FETCH = 'LIMIT'
STRUCT_DELIMITER = ('(', ')')
RENAME_TABLE_WITH_DB = False
NVL2_SUPPORTED = False
SEMI_ANTI_JOIN_WITH_SIDE = False
TABLESAMPLE_KEYWORDS = 'USING SAMPLE'
TABLESAMPLE_SEED_KEYWORD = 'REPEATABLE'
LAST_DAY_SUPPORTS_DATE_PART = False
JSON_KEY_VALUE_PAIR_SEP = ','
IGNORE_NULLS_IN_FUNC = True
JSON_PATH_BRACKETED_KEY_SUPPORTED = False
SUPPORTS_CREATE_TABLE_LIKE = False
MULTI_ARG_DISTINCT = False
CAN_IMPLEMENT_ARRAY_ANY = True
TRANSFORMS = {<class 'sqlglot.expressions.JSONPathKey'>: <function <lambda>>, <class 'sqlglot.expressions.JSONPathRoot'>: <function <lambda>>, <class 'sqlglot.expressions.JSONPathSubscript'>: <function <lambda>>, <class 'sqlglot.expressions.JSONPathWildcard'>: <function <lambda>>, <class 'sqlglot.expressions.AutoRefreshProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.CaseSpecificColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.CharacterSetColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.CharacterSetProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.ClusteredColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.CollateColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.CommentColumnConstraint'>: <function no_comment_column_constraint_sql>, <class 'sqlglot.expressions.CopyGrantsProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.DateAdd'>: <function _date_delta_sql>, <class 'sqlglot.expressions.DateFormatColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.DefaultColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.EncodeColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.ExecuteAsProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.ExternalProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.HeapProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.InheritsProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.InlineLengthColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.InputModelProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.IntervalSpan'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.JSONExtract'>: <function arrow_json_extract_sql>, <class 'sqlglot.expressions.JSONExtractScalar'>: <function arrow_json_extract_sql>, <class 'sqlglot.expressions.LanguageProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.LocationProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.LogProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.MaterializedProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.NonClusteredColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.NoPrimaryIndexProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.NotForReplicationColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.OnCommitProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.OnProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.OnUpdateColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.OutputModelProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.PathColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.RemoteWithConnectionModelProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.ReturnsProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.SampleProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.SetConfigProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.SetProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.SettingsProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.SqlReadWriteProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.SqlSecurityProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.StabilityProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.TemporaryProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.TitleColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.Timestamp'>: <function no_timestamp_sql>, <class 'sqlglot.expressions.ToTableProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.TransformModelProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.TransientProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.UppercaseColumnConstraint'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.VarMap'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.VolatileProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.WithJournalTableProperty'>: <function Generator.<lambda>>, <class 'sqlglot.expressions.ApproxDistinct'>: <function approx_count_distinct_sql>, <class 'sqlglot.expressions.Array'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.ArrayFilter'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.ArraySize'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.ArgMax'>: <function arg_max_or_min_no_count.<locals>._arg_max_or_min_sql>, <class 'sqlglot.expressions.ArgMin'>: <function arg_max_or_min_no_count.<locals>._arg_max_or_min_sql>, <class 'sqlglot.expressions.ArraySort'>: <function _array_sort_sql>, <class 'sqlglot.expressions.ArraySum'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.BitwiseXor'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.CurrentDate'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.CurrentTime'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.CurrentTimestamp'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.DayOfMonth'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.DayOfWeek'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.DayOfYear'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.DataType'>: <function _datatype_sql>, <class 'sqlglot.expressions.Date'>: <function _date_sql>, <class 'sqlglot.expressions.DateFromParts'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.DateSub'>: <function _date_delta_sql>, <class 'sqlglot.expressions.DateDiff'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.DateStrToDate'>: <function datestrtodate_sql>, <class 'sqlglot.expressions.DateToDi'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.Decode'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.DiToDate'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.Encode'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.Explode'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.IntDiv'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.IsInf'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.IsNan'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.JSONFormat'>: <function _json_format_sql>, <class 'sqlglot.expressions.LogicalOr'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.LogicalAnd'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.MonthsBetween'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.ParseJSON'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.PercentileCont'>: <function _rename_unless_within_group.<locals>.<lambda>>, <class 'sqlglot.expressions.PercentileDisc'>: <function _rename_unless_within_group.<locals>.<lambda>>, <class 'sqlglot.expressions.Pivot'>: <function preprocess.<locals>._to_sql>, <class 'sqlglot.expressions.RegexpExtract'>: <function regexp_extract_sql>, <class 'sqlglot.expressions.RegexpReplace'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.RegexpLike'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.RegexpSplit'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.Rand'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.SafeDivide'>: <function no_safe_divide_sql>, <class 'sqlglot.expressions.Split'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.SortArray'>: <function _sort_array_sql>, <class 'sqlglot.expressions.StrPosition'>: <function str_position_sql>, <class 'sqlglot.expressions.StrToDate'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.StrToTime'>: <function str_to_time_sql>, <class 'sqlglot.expressions.StrToUnix'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.Struct'>: <function _struct_sql>, <class 'sqlglot.expressions.TimestampDiff'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.TimestampTrunc'>: <function timestamptrunc_sql>, <class 'sqlglot.expressions.TimeStrToDate'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.TimeStrToTime'>: <function timestrtotime_sql>, <class 'sqlglot.expressions.TimeStrToUnix'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.TimeToStr'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.TimeToUnix'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.TsOrDiToDi'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.TsOrDsAdd'>: <function _ts_or_ds_add_sql>, <class 'sqlglot.expressions.TsOrDsDiff'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.UnixToStr'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.UnixToTime'>: <function _unix_to_time_sql>, <class 'sqlglot.expressions.UnixToTimeStr'>: <function DuckDB.Generator.<lambda>>, <class 'sqlglot.expressions.VariancePop'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.WeekOfYear'>: <function rename_func.<locals>.<lambda>>, <class 'sqlglot.expressions.Xor'>: <function bool_xor_sql>}
SUPPORTED_JSON_PATH_PARTS = {<class 'sqlglot.expressions.JSONPathWildcard'>, <class 'sqlglot.expressions.JSONPathKey'>, <class 'sqlglot.expressions.JSONPathSubscript'>, <class 'sqlglot.expressions.JSONPathRoot'>}
TYPE_MAPPING = {<Type.NCHAR: 'NCHAR'>: 'TEXT', <Type.NVARCHAR: 'NVARCHAR'>: 'TEXT', <Type.MEDIUMTEXT: 'MEDIUMTEXT'>: 'TEXT', <Type.LONGTEXT: 'LONGTEXT'>: 'TEXT', <Type.TINYTEXT: 'TINYTEXT'>: 'TEXT', <Type.MEDIUMBLOB: 'MEDIUMBLOB'>: 'BLOB', <Type.LONGBLOB: 'LONGBLOB'>: 'BLOB', <Type.TINYBLOB: 'TINYBLOB'>: 'BLOB', <Type.INET: 'INET'>: 'INET', <Type.BINARY: 'BINARY'>: 'BLOB', <Type.CHAR: 'CHAR'>: 'TEXT', <Type.FLOAT: 'FLOAT'>: 'REAL', <Type.UINT: 'UINT'>: 'UINTEGER', <Type.VARBINARY: 'VARBINARY'>: 'BLOB', <Type.VARCHAR: 'VARCHAR'>: 'TEXT', <Type.TIMESTAMP_S: 'TIMESTAMP_S'>: 'TIMESTAMP_S', <Type.TIMESTAMP_MS: 'TIMESTAMP_MS'>: 'TIMESTAMP_MS', <Type.TIMESTAMP_NS: 'TIMESTAMP_NS'>: 'TIMESTAMP_NS'}
STAR_MAPPING = {'except': 'EXCLUDE', 'replace': 'REPLACE'}
UNWRAPPED_INTERVAL_VALUES = (<class 'sqlglot.expressions.Column'>, <class 'sqlglot.expressions.Literal'>, <class 'sqlglot.expressions.Paren'>)
PROPERTIES_LOCATION = {<class 'sqlglot.expressions.AlgorithmProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.AutoIncrementProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.AutoRefreshProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.BlockCompressionProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.CharacterSetProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.ChecksumProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.CollateProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.CopyGrantsProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.Cluster'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.ClusteredByProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.DataBlocksizeProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.DefinerProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.DictRange'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.DictProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.DistKeyProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.DistStyleProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.EngineProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.ExecuteAsProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.ExternalProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.FallbackProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.FileFormatProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.FreespaceProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.HeapProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.InheritsProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.InputModelProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.IsolatedLoadingProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.JournalProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.LanguageProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.LikeProperty'>: <Location.POST_SCHEMA: 'POST_SCHEMA'>, <class 'sqlglot.expressions.LocationProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.LockProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.LockingProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.LogProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.MaterializedProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.MergeBlockRatioProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.NoPrimaryIndexProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.OnProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.OnCommitProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.Order'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.OutputModelProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.PartitionedByProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.PartitionedOfProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.PrimaryKey'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.Property'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.RemoteWithConnectionModelProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.ReturnsProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.RowFormatProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.RowFormatDelimitedProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.RowFormatSerdeProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SampleProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SchemaCommentProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SerdeProperties'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.Set'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SettingsProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SetProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SetConfigProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SortKeyProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SqlReadWriteProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.SqlSecurityProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.StabilityProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.TemporaryProperty'>: <Location.POST_CREATE: 'POST_CREATE'>, <class 'sqlglot.expressions.ToTableProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.TransientProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.TransformModelProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.MergeTreeTTL'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.VolatileProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.WithDataProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.WithJournalTableProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>, <class 'sqlglot.expressions.WithSystemVersioningProperty'>: <Location.UNSUPPORTED: 'UNSUPPORTED'>}
def timefromparts_sql(self, expression: sqlglot.expressions.TimeFromParts) -> str: View Source

    496        def timefromparts_sql(self, expression: exp.TimeFromParts) -> str:
    497            nano = expression.args.get("nano")
    498            if nano is not None:
    499                expression.set(
    500                    "sec", expression.args["sec"] + nano.pop() / exp.Literal.number(1000000000.0)
    501                )
    502
    503            return rename_func("MAKE_TIME")(self, expression)

def timestampfromparts_sql(self, expression: sqlglot.expressions.TimestampFromParts) -> str: View Source

    505        def timestampfromparts_sql(self, expression: exp.TimestampFromParts) -> str:
    506            sec = expression.args["sec"]
    507
    508            milli = expression.args.get("milli")
    509            if milli is not None:
    510                sec += milli.pop() / exp.Literal.number(1000.0)
    511
    512            nano = expression.args.get("nano")
    513            if nano is not None:
    514                sec += nano.pop() / exp.Literal.number(1000000000.0)
    515
    516            if milli or nano:
    517                expression.set("sec", sec)
    518
    519            return rename_func("MAKE_TIMESTAMP")(self, expression)

def tablesample_sql( self, expression: sqlglot.expressions.TableSample, sep: str = ' AS ', tablesample_keyword: Optional[str] = None) -> str: View Source

    521        def tablesample_sql(
    522            self,
    523            expression: exp.TableSample,
    524            sep: str = " AS ",
    525            tablesample_keyword: t.Optional[str] = None,
    526        ) -> str:
    527            if not isinstance(expression.parent, exp.Select):
    528                # This sample clause only applies to a single source, not the entire resulting relation
    529                tablesample_keyword = "TABLESAMPLE"
    530
    531            return super().tablesample_sql(
    532                expression, sep=sep, tablesample_keyword=tablesample_keyword
    533            )

def interval_sql(self, expression: sqlglot.expressions.Interval) -> str: View Source

    535        def interval_sql(self, expression: exp.Interval) -> str:
    536            multiplier: t.Optional[int] = None
    537            unit = expression.text("unit").lower()
    538
    539            if unit.startswith("week"):
    540                multiplier = 7
    541            if unit.startswith("quarter"):
    542                multiplier = 90
    543
    544            if multiplier:
    545                return f"({multiplier} * {super().interval_sql(exp.Interval(this=expression.this, unit=exp.var('DAY')))})"
    546
    547            return super().interval_sql(expression)

def columndef_sql(self, expression: sqlglot.expressions.ColumnDef, sep: str = ' ') -> str: View Source

    549        def columndef_sql(self, expression: exp.ColumnDef, sep: str = " ") -> str:
    550            if isinstance(expression.parent, exp.UserDefinedFunction):
    551                return self.sql(expression, "this")
    552            return super().columndef_sql(expression, sep)

def join_sql(self, expression: sqlglot.expressions.Join) -> str: View Source

    554        def join_sql(self, expression: exp.Join) -> str:
    555            if (
    556                expression.side == "LEFT"
    557                and not expression.args.get("on")
    558                and isinstance(expression.this, exp.Unnest)
    559            ):
    560                # Some dialects support `LEFT JOIN UNNEST(...)` without an explicit ON clause
    561                # DuckDB doesn't, but we can just add a dummy ON clause that is always true
    562                return super().join_sql(expression.on(exp.true()))
    563
    564            return super().join_sql(expression)

def generateseries_sql(self, expression: sqlglot.expressions.GenerateSeries) -> str: View Source

    566        def generateseries_sql(self, expression: exp.GenerateSeries) -> str:
    567            # GENERATE_SERIES(a, b) -> [a, b], RANGE(a, b) -> [a, b)
    568            if expression.args.get("is_end_exclusive"):
    569                expression.set("is_end_exclusive", None)
    570                return rename_func("RANGE")(self, expression)
    571
    572            return super().generateseries_sql(expression)

SELECT_KINDS: Tuple[str, ...] = ()

##### Inherited Members

sqlglot.generator.Generator
  Generator
  NULL_ORDERING_SUPPORTED
  LOCKING_READS_SUPPORTED
  EXPLICIT_UNION
  WRAP_DERIVED_VALUES
  CREATE_FUNCTION_RETURN_AS
  MATCHED_BY_SOURCE
  SINGLE_STRING_INTERVAL
  INTERVAL_ALLOWS_PLURAL_FORM
  LIMIT_ONLY_LITERALS
  GROUPINGS_SEP
  INDEX_ON
  QUERY_HINT_SEP
  IS_BOOL_ALLOWED
  DUPLICATE_KEY_UPDATE_WITH_SET
  LIMIT_IS_TOP
  RETURNING_END
  COLUMN_JOIN_MARKS_SUPPORTED
  EXTRACT_ALLOWS_QUOTES
  TZ_TO_WITH_TIME_ZONE
  VALUES_AS_TABLE
  ALTER_TABLE_INCLUDE_COLUMN_KEYWORD
  UNNEST_WITH_ORDINALITY
  AGGREGATE_FILTER_SUPPORTED
  COMPUTED_COLUMN_WITH_TYPE
  SUPPORTS_TABLE_COPY
  TABLESAMPLE_REQUIRES_PARENS
  TABLESAMPLE_SIZE_IS_ROWS
  TABLESAMPLE_WITH_METHOD
  COLLATE_IS_FUNC
  DATA_TYPE_SPECIFIERS_ALLOWED
  ENSURE_BOOLS
  CTE_RECURSIVE_KEYWORD_REQUIRED
  SUPPORTS_SINGLE_ARG_CONCAT
  SUPPORTS_TABLE_ALIAS_COLUMNS
  UNPIVOT_ALIASES_ARE_IDENTIFIERS
  INSERT_OVERWRITE
  SUPPORTS_SELECT_INTO
  SUPPORTS_UNLOGGED_TABLES
  LIKE_PROPERTY_INSIDE_SCHEMA
  JSON_TYPE_REQUIRED_FOR_EXTRACTION
  JSON_PATH_SINGLE_QUOTE_ESCAPE
  TIME_PART_SINGULARS
  TOKEN_MAPPING
  RESERVED_KEYWORDS
  WITH_SEPARATED_COMMENTS
  EXCLUDE_COMMENTS
  PARAMETERIZABLE_TEXT_TYPES
  EXPRESSIONS_WITHOUT_NESTED_CTES
  SENTINEL_LINE_BREAK
  pretty
  identify
  normalize
  pad
  unsupported_level
  max_unsupported
  leading_comma
  max_text_width
  comments
  dialect
  normalize_functions
  unsupported_messages
  generate
  preprocess
  unsupported
  sep
  seg
  pad_comment
  maybe_comment
  wrap
  no_identify
  normalize_func
  indent
  sql
  uncache_sql
  cache_sql
  characterset_sql
  column_sql
  columnposition_sql
  columnconstraint_sql
  computedcolumnconstraint_sql
  autoincrementcolumnconstraint_sql
  compresscolumnconstraint_sql
  generatedasidentitycolumnconstraint_sql
  generatedasrowcolumnconstraint_sql
  periodforsystemtimeconstraint_sql
  notnullcolumnconstraint_sql
  transformcolumnconstraint_sql
  primarykeycolumnconstraint_sql
  uniquecolumnconstraint_sql
  createable_sql
  create_sql
  clone_sql
  describe_sql
  heredoc_sql
  prepend_ctes
  with_sql
  cte_sql
  tablealias_sql
  bitstring_sql
  hexstring_sql
  bytestring_sql
  unicodestring_sql
  rawstring_sql
  datatypeparam_sql
  datatype_sql
  directory_sql
  delete_sql
  drop_sql
  except_sql
  except_op
  fetch_sql
  filter_sql
  hint_sql
  index_sql
  identifier_sql
  inputoutputformat_sql
  national_sql
  partition_sql
  properties_sql
  root_properties
  properties
  with_properties
  locate_properties
  property_name
  property_sql
  likeproperty_sql
  fallbackproperty_sql
  journalproperty_sql
  freespaceproperty_sql
  checksumproperty_sql
  mergeblockratioproperty_sql
  datablocksizeproperty_sql
  blockcompressionproperty_sql
  isolatedloadingproperty_sql
  partitionboundspec_sql
  partitionedofproperty_sql
  lockingproperty_sql
  withdataproperty_sql
  withsystemversioningproperty_sql
  insert_sql
  intersect_sql
  intersect_op
  introducer_sql
  kill_sql
  pseudotype_sql
  objectidentifier_sql
  onconflict_sql
  returning_sql
  rowformatdelimitedproperty_sql
  withtablehint_sql
  indextablehint_sql
  historicaldata_sql
  table_parts
  table_sql
  pivot_sql
  version_sql
  tuple_sql
  update_sql
  values_sql
  var_sql
  into_sql
  from_sql
  group_sql
  having_sql
  connect_sql
  prior_sql
  lambda_sql
  lateral_op
  lateral_sql
  limit_sql
  offset_sql
  setitem_sql
  set_sql
  pragma_sql
  lock_sql
  literal_sql
  escape_str
  loaddata_sql
  null_sql
  boolean_sql
  order_sql
  withfill_sql
  cluster_sql
  distribute_sql
  sort_sql
  ordered_sql
  matchrecognize_sql
  query_modifiers
  queryoption_sql
  offset_limit_modifiers
  after_having_modifiers
  after_limit_modifiers
  select_sql
  schema_sql
  schema_columns_sql
  star_sql
  parameter_sql
  sessionparameter_sql
  placeholder_sql
  subquery_sql
  qualify_sql
  union_sql
  union_op
  unnest_sql
  prewhere_sql
  where_sql
  window_sql
  partition_by_sql
  windowspec_sql
  withingroup_sql
  between_sql
  bracket_sql
  all_sql
  any_sql
  exists_sql
  case_sql
  constraint_sql
  nextvaluefor_sql
  extract_sql
  trim_sql
  convert_concat_args
  concat_sql
  concatws_sql
  check_sql
  foreignkey_sql
  primarykey_sql
  if_sql
  matchagainst_sql
  jsonkeyvalue_sql
  jsonpath_sql
  json_path_part
  formatjson_sql
  jsonobject_sql
  jsonobjectagg_sql
  jsonarray_sql
  jsonarrayagg_sql
  jsoncolumndef_sql
  jsonschema_sql
  jsontable_sql
  openjsoncolumndef_sql
  openjson_sql
  in_sql
  in_unnest_op
  return_sql
  reference_sql
  anonymous_sql
  paren_sql
  neg_sql
  not_sql
  alias_sql
  pivotalias_sql
  aliases_sql
  atindex_sql
  attimezone_sql
  fromtimezone_sql
  add_sql
  and_sql
  xor_sql
  connector_sql
  bitwiseand_sql
  bitwiseleftshift_sql
  bitwisenot_sql
  bitwiseor_sql
  bitwiserightshift_sql
  bitwisexor_sql
  cast_sql
  currentdate_sql
  currenttimestamp_sql
  collate_sql
  command_sql
  comment_sql
  mergetreettlaction_sql
  mergetreettl_sql
  transaction_sql
  commit_sql
  rollback_sql
  altercolumn_sql
  renametable_sql
  renamecolumn_sql
  altertable_sql
  add_column_sql
  droppartition_sql
  addconstraint_sql
  distinct_sql
  ignorenulls_sql
  respectnulls_sql
  havingmax_sql
  intdiv_sql
  dpipe_sql
  div_sql
  overlaps_sql
  distance_sql
  dot_sql
  eq_sql
  propertyeq_sql
  escape_sql
  glob_sql
  gt_sql
  gte_sql
  ilike_sql
  ilikeany_sql
  is_sql
  like_sql
  likeany_sql
  similarto_sql
  lt_sql
  lte_sql
  mod_sql
  mul_sql
  neq_sql
  nullsafeeq_sql
  nullsafeneq_sql
  or_sql
  slice_sql
  sub_sql
  trycast_sql
  log_sql
  use_sql
  binary
  function_fallback_sql
  func
  format_args
  text_width
  format_time
  expressions
  op_expressions
  naked_property
  set_operation
  tag_sql
  token_sql
  userdefinedfunction_sql
  joinhint_sql
  kwarg_sql
  when_sql
  merge_sql
  tochar_sql
  dictproperty_sql
  dictrange_sql
  dictsubproperty_sql
  oncluster_sql
  clusteredbyproperty_sql
  anyvalue_sql
  querytransform_sql
  indexconstraintoption_sql
  checkcolumnconstraint_sql
  indexcolumnconstraint_sql
  nvl2_sql
  comprehension_sql
  columnprefix_sql
  opclass_sql
  predict_sql
  forin_sql
  refresh_sql
  operator_sql
  toarray_sql
  tsordstotime_sql
  tsordstodate_sql
  unixdate_sql
  lastday_sql
  arrayany_sql
  struct_sql
  partitionrange_sql
  truncatetable_sql
  convert_sql