sqlglot API documentation

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SQLGlot is a no-dependency SQL parser, transpiler, optimizer, and engine. It can be used to format SQL or translate between 20 different dialects like DuckDB, Presto / Trino, Spark / Databricks, Snowflake, and BigQuery. It aims to read a wide variety of SQL inputs and output syntactically and semantically correct SQL in the targeted dialects.

It is a very comprehensive generic SQL parser with a robust test suite. It is also quite performant, while being written purely in Python.

You can easily customize the parser, analyze queries, traverse expression trees, and programmatically build SQL.

Syntax errors are highlighted and dialect incompatibilities can warn or raise depending on configurations. However, it should be noted that SQL validation is not SQLGlot’s goal, so some syntax errors may go unnoticed.

Learn more about SQLGlot in the API documentation and the expression tree primer.

Contributions are very welcome in SQLGlot; read the contribution guide to get started!

## Table of Contents

- Install
- Versioning
- Get in Touch
- FAQ
- Examples
  - Formatting and Transpiling
  - Metadata
  - Parser Errors
  - Unsupported Errors
  - Build and Modify SQL
  - SQL Optimizer
  - AST Introspection
  - AST Diff
  - Custom Dialects
  - SQL Execution
- Used By
- Documentation
- Run Tests and Lint
- Benchmarks
- Optional Dependencies

## Install

From PyPI:

    pip3 install "sqlglot[rs]"

    # Without Rust tokenizer (slower):
    # pip3 install sqlglot

Or with a local checkout:

    make install

Requirements for development (optional):

    make install-dev

## Versioning

Given a version number `MAJOR`.`MINOR`.`PATCH`, SQLGlot uses the following versioning strategy:

- The `PATCH` version is incremented when there are backwards-compatible fixes or feature additions.
- The `MINOR` version is incremented when there are backwards-incompatible fixes or feature additions.
- The `MAJOR` version is incremented when there are significant backwards-incompatible fixes or feature additions.

## Get in Touch

We'd love to hear from you. Join our community Slack channel!

## FAQ

I tried to parse SQL that should be valid but it failed, why did that happen?

- Most of the time, issues like this occur because the "source" dialect is omitted during parsing. For example, this is how to correctly parse a SQL query written in Spark SQL: `parse_one(sql, dialect="spark")` (alternatively: `read="spark"`). If no dialect is specified, `parse_one` will attempt to parse the query according to the "SQLGlot dialect", which is designed to be a superset of all supported dialects. If you tried specifying the dialect and it still doesn't work, please file an issue.

I tried to output SQL but it's not in the correct dialect!

- Like parsing, generating SQL also requires the target dialect to be specified, otherwise the SQLGlot dialect will be used by default. For example, to transpile a query from Spark SQL to DuckDB, do `parse_one(sql, dialect="spark").sql(dialect="duckdb")` (alternatively: `transpile(sql, read="spark", write="duckdb")`).

I tried to parse invalid SQL and it worked, even though it should raise an error! Why didn't it validate my SQL?

- SQLGlot does not aim to be a SQL validator - it is designed to be very forgiving. This makes the codebase more comprehensive and also gives more flexibility to its users, e.g. by allowing them to include trailing commas in their projection lists.

## Examples

### Formatting and Transpiling

Easily translate from one dialect to another. For example, date/time functions vary between dialects and can be hard to deal with:

    import sqlglot
    transpile("SELECT EPOCH_MS(1618088028295)", read="duckdb", write="hive")[0]

    'SELECT FROM_UNIXTIME(1618088028295 / POW(10, 3))'

SQLGlot can even translate custom time formats:

    import sqlglot
    transpile("SELECT STRFTIME(x, '%y-%-m-%S')", read="duckdb", write="hive")[0]

    "SELECT DATE_FORMAT(x, 'yy-M-ss')"

As another example, let's suppose that we want to read in a SQL query that contains a CTE and a cast to `REAL`, and then transpile it to Spark, which uses backticks for identifiers and `FLOAT` instead of `REAL`:

    import sqlglot

    sql = """WITH baz AS (SELECT a, c FROM foo WHERE a = 1) SELECT f.a, b.b, baz.c, CAST("b"."a" AS REAL) d FROM foo f JOIN bar b ON f.a = b.a LEFT JOIN baz ON f.a = baz.a"""
    print(transpile(sql, write="spark", identify=True, pretty=True)[0])

    WITH `baz` AS (
      SELECT
        `a`,
        `c`
      FROM `foo`
      WHERE
        `a` = 1
    )
    SELECT
      `f`.`a`,
      `b`.`b`,
      `baz`.`c`,
      CAST(`b`.`a` AS FLOAT) AS `d`
    FROM `foo` AS `f`
    JOIN `bar` AS `b`
      ON `f`.`a` = `b`.`a`
    LEFT JOIN `baz`
      ON `f`.`a` = `baz`.`a`

Comments are also preserved on a best-effort basis when transpiling SQL code:

    sql = """
    /* multi
       line
       comment
    */
    SELECT
      tbl.cola /* comment 1 */ + tbl.colb /* comment 2 */,
      CAST(x AS INT), # comment 3
      y               -- comment 4
    FROM
      bar /* comment 5 */,
      tbl #          comment 6
    """

    print(transpile(sql, read='mysql', pretty=True)[0])

    /* multi
       line
       comment
    */
    SELECT
      tbl.cola /* comment 1 */ + tbl.colb /* comment 2 */,
      CAST(x AS INT), /* comment 3 */
      y /* comment 4 */
    FROM bar /* comment 5 */, tbl /*          comment 6 */

### Metadata

You can explore SQL with expression helpers to do things like find columns and tables:

    from sqlglot import parse_one, exp

    # print all column references (a and b)
    for column in parse_one("SELECT a, b + 1 AS c FROM d").find_all(exp.Column):
        print(column.alias_or_name)

    # find all projections in select statements (a and c)
    for select in parse_one("SELECT a, b + 1 AS c FROM d").find_all(exp.Select):
        for projection in select.expressions:
            print(projection.alias_or_name)

    # find all tables (x, y, z)
    for table in parse_one("SELECT * FROM x JOIN y JOIN z").find_all(exp.Table):
        print(table.name)

Read the ast primer to learn more about SQLGlot's internals.

### Parser Errors

When the parser detects an error in the syntax, it raises a ParseError:

    import sqlglot
    transpile("SELECT foo FROM (SELECT baz FROM t")

    sqlglot.errors.ParseError: Expecting ). Line 1, Col: 34.
      SELECT foo FROM (SELECT baz FROM t
                                       ~

Structured syntax errors are accessible for programmatic use:

    import sqlglot
    try:
        transpile("SELECT foo FROM (SELECT baz FROM t")
    except sqlglot.errors.ParseError as e:
        print(e.errors)

    [{
      'description': 'Expecting )',
      'line': 1,
      'col': 34,
      'start_context': 'SELECT foo FROM (SELECT baz FROM ',
      'highlight': 't',
      'end_context': '',
      'into_expression': None
    }]

### Unsupported Errors

Presto `APPROX_DISTINCT` supports the accuracy argument which is not supported in Hive:

    import sqlglot
    transpile("SELECT APPROX_DISTINCT(a, 0.1) FROM foo", read="presto", write="hive")

    APPROX_COUNT_DISTINCT does not support accuracy
    'SELECT APPROX_COUNT_DISTINCT(a) FROM foo'

### Build and Modify SQL

SQLGlot supports incrementally building sql expressions:

    from sqlglot import select, condition

    where = condition("x=1").and_("y=1")
    select("*").from_("y").where(where).sql()

    'SELECT * FROM y WHERE x = 1 AND y = 1'

You can also modify a parsed tree:

    from sqlglot import parse_one
    parse_one("SELECT x FROM y").from_("z").sql()

    'SELECT x FROM z'

There is also a way to recursively transform the parsed tree by applying a mapping function to each tree node:

    from sqlglot import exp, parse_one

    expression_tree = parse_one("SELECT a FROM x")

    def transformer(node):
        if isinstance(node, exp.Column) and node.name == "a":
            return parse_one("FUN(a)")
        return node

    transformed_tree = expression_tree.transform(transformer)
    transformed_tree.sql()

    'SELECT FUN(a) FROM x'

### SQL Optimizer

SQLGlot can rewrite queries into an "optimized" form. It performs a variety of techniques to create a new canonical AST. This AST can be used to standardize queries or provide the foundations for implementing an actual engine. For example:

    import sqlglot
    from sqlglot.optimizer import optimize

    print(
        optimize(
            parse_one("""
                SELECT A OR (B OR (C AND D))
                FROM x
                WHERE Z = date '2021-01-01' + INTERVAL '1' month OR 1 = 0
            """),
            schema={"x": {"A": "INT", "B": "INT", "C": "INT", "D": "INT", "Z": "STRING"}}
        ).sql(pretty=True)
    )

    SELECT
      (
        "x"."a" <> 0 OR "x"."b" <> 0 OR "x"."c" <> 0
      )
      AND (
        "x"."a" <> 0 OR "x"."b" <> 0 OR "x"."d" <> 0
      ) AS "_col_0"
    FROM "x" AS "x"
    WHERE
      CAST("x"."z" AS DATE) = CAST('2021-02-01' AS DATE)

### AST Introspection

You can see the AST version of the sql by calling `repr`:

    from sqlglot import parse_one
    print(repr(parse_one("SELECT a + 1 AS z")))

    Select(
      expressions=[
        Alias(
          this=Add(
            this=Column(
              this=Identifier(this=a, quoted=False)),
            expression=Literal(this=1, is_string=False)),
          alias=Identifier(this=z, quoted=False))])

### AST Diff

SQLGlot can calculate the difference between two expressions and output changes in a form of a sequence of actions needed to transform a source expression into a target one:

    from sqlglot import diff, parse_one
    diff(parse_one("SELECT a + b, c, d"), parse_one("SELECT c, a - b, d"))

    [
      Remove(expression=Add(
        this=Column(
          this=Identifier(this=a, quoted=False)),
        expression=Column(
          this=Identifier(this=b, quoted=False)))),
      Insert(expression=Sub(
        this=Column(
          this=Identifier(this=a, quoted=False)),
        expression=Column(
          this=Identifier(this=b, quoted=False)))),
      Keep(source=Identifier(this=d, quoted=False), target=Identifier(this=d, quoted=False)),
      ...
    ]

See also: Semantic Diff for SQL.

### Custom Dialects

Dialects can be added by subclassing `Dialect`:

    from sqlglot import exp
    from sqlglot.dialects.dialect import Dialect
    from sqlglot.generator import Generator
    from sqlglot.tokens import Tokenizer, TokenType

    class Custom(Dialect):
        class Tokenizer(Tokenizer):
            QUOTES = ["'", '"']
            IDENTIFIERS = ["`"]

            KEYWORDS = {
                **Tokenizer.KEYWORDS,
                "INT64": TokenType.BIGINT,
                "FLOAT64": TokenType.DOUBLE,
            }

        class Generator(Generator):
            TRANSFORMS = {exp.Array: lambda self, e: f"[{self.expressions(e)}]"}

            TYPE_MAPPING = {
                exp.DataType.Type.TINYINT: "INT64",
                exp.DataType.Type.SMALLINT: "INT64",
                exp.DataType.Type.INT: "INT64",
                exp.DataType.Type.BIGINT: "INT64",
                exp.DataType.Type.DECIMAL: "NUMERIC",
                exp.DataType.Type.FLOAT: "FLOAT64",
                exp.DataType.Type.DOUBLE: "FLOAT64",
                exp.DataType.Type.BOOLEAN: "BOOL",
                exp.DataType.Type.TEXT: "STRING",
            }

    print(Dialect["custom"])

    <class '__main__.Custom'>

### SQL Execution

One can even interpret SQL queries using SQLGlot, where the tables are represented as Python dictionaries. Although the engine is not very fast (it's not supposed to be) and is in a relatively early stage of development, it can be useful for unit testing and running SQL natively across Python objects. Additionally, the foundation can be easily integrated with fast compute kernels (arrow, pandas). Below is an example showcasing the execution of a SELECT expression that involves aggregations and JOINs:

    from sqlglot.executor import execute

    tables = {
        "sushi": [
            {"id": 1, "price": 1.0},
            {"id": 2, "price": 2.0},
            {"id": 3, "price": 3.0},
        ],
        "order_items": [
            {"sushi_id": 1, "order_id": 1},
            {"sushi_id": 1, "order_id": 1},
            {"sushi_id": 2, "order_id": 1},
            {"sushi_id": 3, "order_id": 2},
        ],
        "orders": [
            {"id": 1, "user_id": 1},
            {"id": 2, "user_id": 2},
        ],
    }

    execute(
        """
        SELECT
          o.user_id,
          SUM(s.price) AS price
        FROM orders o
        JOIN order_items i
          ON o.id = i.order_id
        JOIN sushi s
          ON i.sushi_id = s.id
        GROUP BY o.user_id
        """,
        tables=tables
    )

    user_id price
          1   4.0
          2   3.0

See also: Writing a Python SQL engine from scratch.

## Used By

- SQLMesh
- Fugue
- ibis
- mysql-mimic
- Querybook
- Quokka
- Splink

## Documentation

SQLGlot uses pdoc to serve its API documentation.

A hosted version is on the SQLGlot website, or you can build locally with:

    make docs-serve

## Run Tests and Lint

    make style  # Only linter checks
    make unit   # Only unit tests
    make check  # Full test suite & linter checks

## Benchmarks

Benchmarks run on Python 3.10.12 in seconds.

Query | sqlglot | sqlglotrs | sqlfluff | sqltree | sqlparse | moz_sql_parser | sqloxide
--- | --- | --- | --- | --- | --- | --- | ---
tpch | 0.00944 (1.0) | 0.00590 (0.625) | 0.32116 (33.98) | 0.00693 (0.734) | 0.02858 (3.025) | 0.03337 (3.532) | 0.00073 (0.077)
short | 0.00065 (1.0) | 0.00044 (0.687) | 0.03511 (53.82) | 0.00049 (0.759) | 0.00163 (2.506) | 0.00234 (3.601) | 0.00005 (0.073)
long | 0.00889 (1.0) | 0.00572 (0.643) | 0.36982 (41.56) | 0.00614 (0.690) | 0.02530 (2.844) | 0.02931 (3.294) | 0.00059 (0.066)
crazy | 0.02918 (1.0) | 0.01991 (0.682) | 1.88695 (64.66) | 0.02003 (0.686) | 7.46894 (255.9) | 0.64994 (22.27) | 0.00327 (0.112)

## Optional Dependencies

SQLGlot uses dateutil to simplify literal timedelta expressions. The optimizer will not simplify expressions like the following if the module cannot be found:

    x + interval '1' month

View Source

      1# ruff: noqa: F401
      2"""
      3.. include:: ../README.md
      4
      5----
      6"""
      7
      8from __future__ import annotations
      9
     10import logging
     11import typing as t
     12
     13from sqlglot import expressions as exp
     14from sqlglot.dialects.dialect import Dialect as Dialect, Dialects as Dialects
     15from sqlglot.diff import diff as diff
     16from sqlglot.errors import (
     17    ErrorLevel as ErrorLevel,
     18    ParseError as ParseError,
     19    TokenError as TokenError,
     20    UnsupportedError as UnsupportedError,
     21)
     22from sqlglot.expressions import (
     23    Expression as Expression,
     24    alias_ as alias,
     25    and_ as and_,
     26    case as case,
     27    cast as cast,
     28    column as column,
     29    condition as condition,
     30    except_ as except_,
     31    from_ as from_,
     32    func as func,
     33    intersect as intersect,
     34    maybe_parse as maybe_parse,
     35    not_ as not_,
     36    or_ as or_,
     37    select as select,
     38    subquery as subquery,
     39    table_ as table,
     40    to_column as to_column,
     41    to_identifier as to_identifier,
     42    to_table as to_table,
     43    union as union,
     44)
     45from sqlglot.generator import Generator as Generator
     46from sqlglot.parser import Parser as Parser
     47from sqlglot.schema import MappingSchema as MappingSchema, Schema as Schema
     48from sqlglot.tokens import Tokenizer as Tokenizer, TokenType as TokenType
     49
     50if t.TYPE_CHECKING:
     51    from sqlglot._typing import E
     52    from sqlglot.dialects.dialect import DialectType as DialectType
     53
     54logger = logging.getLogger("sqlglot")
     55
     56
     57try:
     58    from sqlglot._version import __version__, __version_tuple__
     59except ImportError:
     60    logger.error(
     61        "Unable to set __version__, run `pip install -e .` or `python setup.py develop` first."
     62    )
     63
     64
     65pretty = False
     66"""Whether to format generated SQL by default."""
     67
     68schema = MappingSchema()
     69"""The default schema used by SQLGlot (e.g. in the optimizer)."""
     70
     71
     72def parse(
     73    sql: str, read: DialectType = None, dialect: DialectType = None, **opts
     74) -> t.List[t.Optional[Expression]]:
     75    """
     76    Parses the given SQL string into a collection of syntax trees, one per parsed SQL statement.
     77
     78    Args:
     79        sql: the SQL code string to parse.
     80        read: the SQL dialect to apply during parsing (eg. "spark", "hive", "presto", "mysql").
     81        dialect: the SQL dialect (alias for read).
     82        **opts: other `sqlglot.parser.Parser` options.
     83
     84    Returns:
     85        The resulting syntax tree collection.
     86    """
     87    return Dialect.get_or_raise(read or dialect).parse(sql, **opts)
     88
     89
     90@t.overload
     91def parse_one(sql: str, *, into: t.Type[E], **opts) -> E: ...
     92
     93
     94@t.overload
     95def parse_one(sql: str, **opts) -> Expression: ...
     96
     97
     98def parse_one(
     99    sql: str,
    100    read: DialectType = None,
    101    dialect: DialectType = None,
    102    into: t.Optional[exp.IntoType] = None,
    103    **opts,
    104) -> Expression:
    105    """
    106    Parses the given SQL string and returns a syntax tree for the first parsed SQL statement.
    107
    108    Args:
    109        sql: the SQL code string to parse.
    110        read: the SQL dialect to apply during parsing (eg. "spark", "hive", "presto", "mysql").
    111        dialect: the SQL dialect (alias for read)
    112        into: the SQLGlot Expression to parse into.
    113        **opts: other `sqlglot.parser.Parser` options.
    114
    115    Returns:
    116        The syntax tree for the first parsed statement.
    117    """
    118
    119    dialect = Dialect.get_or_raise(read or dialect)
    120
    121    if into:
    122        result = dialect.parse_into(into, sql, **opts)
    123    else:
    124        result = dialect.parse(sql, **opts)
    125
    126    for expression in result:
    127        if not expression:
    128            raise ParseError(f"No expression was parsed from '{sql}'")
    129        return expression
    130    else:
    131        raise ParseError(f"No expression was parsed from '{sql}'")
    132
    133
    134def transpile(
    135    sql: str,
    136    read: DialectType = None,
    137    write: DialectType = None,
    138    identity: bool = True,
    139    error_level: t.Optional[ErrorLevel] = None,
    140    **opts,
    141) -> t.List[str]:
    142    """
    143    Parses the given SQL string in accordance with the source dialect and returns a list of SQL strings transformed
    144    to conform to the target dialect. Each string in the returned list represents a single transformed SQL statement.
    145
    146    Args:
    147        sql: the SQL code string to transpile.
    148        read: the source dialect used to parse the input string (eg. "spark", "hive", "presto", "mysql").
    149        write: the target dialect into which the input should be transformed (eg. "spark", "hive", "presto", "mysql").
    150        identity: if set to `True` and if the target dialect is not specified the source dialect will be used as both:
    151            the source and the target dialect.
    152        error_level: the desired error level of the parser.
    153        **opts: other `sqlglot.generator.Generator` options.
    154
    155    Returns:
    156        The list of transpiled SQL statements.
    157    """
    158    write = (read if write is None else write) if identity else write
    159    write = Dialect.get_or_raise(write)
    160    return [
    161        write.generate(expression, copy=False, **opts) if expression else ""
    162        for expression in parse(sql, read, error_level=error_level)
    163    ]

logger = <Logger sqlglot (WARNING)>
pretty = False

Whether to format generated SQL by default.

schema = <sqlglot.schema.MappingSchema object>

The default schema used by SQLGlot (e.g. in the optimizer).

def parse( sql: str, read: Union[str, sqlglot.dialects.dialect.Dialect, Type[sqlglot.dialects.dialect.Dialect], NoneType] = None, dialect: Union[str, sqlglot.dialects.dialect.Dialect, Type[sqlglot.dialects.dialect.Dialect], NoneType] = None, **opts) -> List[Optional[sqlglot.expressions.Expression]]: View Source

    73def parse(
    74    sql: str, read: DialectType = None, dialect: DialectType = None, **opts
    75) -> t.List[t.Optional[Expression]]:
    76    """
    77    Parses the given SQL string into a collection of syntax trees, one per parsed SQL statement.
    78
    79    Args:
    80        sql: the SQL code string to parse.
    81        read: the SQL dialect to apply during parsing (eg. "spark", "hive", "presto", "mysql").
    82        dialect: the SQL dialect (alias for read).
    83        **opts: other `sqlglot.parser.Parser` options.
    84
    85    Returns:
    86        The resulting syntax tree collection.
    87    """
    88    return Dialect.get_or_raise(read or dialect).parse(sql, **opts)

Parses the given SQL string into a collection of syntax trees, one per parsed SQL statement.

###### Arguments:

- sql: the SQL code string to parse.
- read: the SQL dialect to apply during parsing (eg. "spark", "hive", "presto", "mysql").
- dialect: the SQL dialect (alias for read).
- **opts: other `sqlglot.parser.Parser` options.

###### Returns:

> The resulting syntax tree collection.

def parse_one( sql: str, read: Union[str, sqlglot.dialects.dialect.Dialect, Type[sqlglot.dialects.dialect.Dialect], NoneType] = None, dialect: Union[str, sqlglot.dialects.dialect.Dialect, Type[sqlglot.dialects.dialect.Dialect], NoneType] = None, into: Union[str, Type[sqlglot.expressions.Expression], Collection[Union[str, Type[sqlglot.expressions.Expression]]], NoneType] = None, **opts) -> sqlglot.expressions.Expression: View Source

     99def parse_one(
    100    sql: str,
    101    read: DialectType = None,
    102    dialect: DialectType = None,
    103    into: t.Optional[exp.IntoType] = None,
    104    **opts,
    105) -> Expression:
    106    """
    107    Parses the given SQL string and returns a syntax tree for the first parsed SQL statement.
    108
    109    Args:
    110        sql: the SQL code string to parse.
    111        read: the SQL dialect to apply during parsing (eg. "spark", "hive", "presto", "mysql").
    112        dialect: the SQL dialect (alias for read)
    113        into: the SQLGlot Expression to parse into.
    114        **opts: other `sqlglot.parser.Parser` options.
    115
    116    Returns:
    117        The syntax tree for the first parsed statement.
    118    """
    119
    120    dialect = Dialect.get_or_raise(read or dialect)
    121
    122    if into:
    123        result = dialect.parse_into(into, sql, **opts)
    124    else:
    125        result = dialect.parse(sql, **opts)
    126
    127    for expression in result:
    128        if not expression:
    129            raise ParseError(f"No expression was parsed from '{sql}'")
    130        return expression
    131    else:
    132        raise ParseError(f"No expression was parsed from '{sql}'")

Parses the given SQL string and returns a syntax tree for the first parsed SQL statement.

###### Arguments:

- sql: the SQL code string to parse.
- read: the SQL dialect to apply during parsing (eg. "spark", "hive", "presto", "mysql").
- dialect: the SQL dialect (alias for read)
- into: the SQLGlot Expression to parse into.
- **opts: other `sqlglot.parser.Parser` options.

###### Returns:

> The syntax tree for the first parsed statement.

def transpile( sql: str, read: Union[str, sqlglot.dialects.dialect.Dialect, Type[sqlglot.dialects.dialect.Dialect], NoneType] = None, write: Union[str, sqlglot.dialects.dialect.Dialect, Type[sqlglot.dialects.dialect.Dialect], NoneType] = None, identity: bool = True, error_level: Optional[sqlglot.errors.ErrorLevel] = None, **opts) -> List[str]: View Source

    135def transpile(
    136    sql: str,
    137    read: DialectType = None,
    138    write: DialectType = None,
    139    identity: bool = True,
    140    error_level: t.Optional[ErrorLevel] = None,
    141    **opts,
    142) -> t.List[str]:
    143    """
    144    Parses the given SQL string in accordance with the source dialect and returns a list of SQL strings transformed
    145    to conform to the target dialect. Each string in the returned list represents a single transformed SQL statement.
    146
    147    Args:
    148        sql: the SQL code string to transpile.
    149        read: the source dialect used to parse the input string (eg. "spark", "hive", "presto", "mysql").
    150        write: the target dialect into which the input should be transformed (eg. "spark", "hive", "presto", "mysql").
    151        identity: if set to `True` and if the target dialect is not specified the source dialect will be used as both:
    152            the source and the target dialect.
    153        error_level: the desired error level of the parser.
    154        **opts: other `sqlglot.generator.Generator` options.
    155
    156    Returns:
    157        The list of transpiled SQL statements.
    158    """
    159    write = (read if write is None else write) if identity else write
    160    write = Dialect.get_or_raise(write)
    161    return [
    162        write.generate(expression, copy=False, **opts) if expression else ""
    163        for expression in parse(sql, read, error_level=error_level)
    164    ]

Parses the given SQL string in accordance with the source dialect and returns a list of SQL strings transformed to conform to the target dialect. Each string in the returned list represents a single transformed SQL statement.

###### Arguments:

- sql: the SQL code string to transpile.
- read: the source dialect used to parse the input string (eg. "spark", "hive", "presto", "mysql").
- write: the target dialect into which the input should be transformed (eg. "spark", "hive", "presto", "mysql").
- identity: if set to `True` and if the target dialect is not specified the source dialect will be used as both: the source and the target dialect.
- error_level: the desired error level of the parser.
- **opts: other `sqlglot.generator.Generator` options.

###### Returns:

> The list of transpiled SQL statements.