db2_exec

Executes an SQL statement directly

&reftitle.description; ``resource``false```db2_exec` `resource` `connection` `string` `statement` `array` `options`[]

Executes an SQL statement directly.

If you plan to interpolate PHP variables into the SQL statement, understand that this is one of the more common security exposures. Consider calling `db2_prepare` to prepare an SQL statement with parameter markers for input values. Then you can call `db2_execute` to pass in the input values and avoid SQL injection attacks.

If you plan to repeatedly issue the same SQL statement with different parameters, consider calling `db2_prepare` and `db2_execute` to enable the database server to reuse its access plan and increase the efficiency of your database access.

&reftitle.parameters;

`connection`

- A valid database connection resource variable as returned from `db2_connect` or `db2_pconnect`.

`statement`

- An SQL statement. The statement cannot contain any parameter markers.

`options`

- An associative array containing statement options. You can use this parameter to request a scrollable cursor on database servers that support this functionality.

  For a description of valid statement options, see `db2_set_option`.

&reftitle.returnvalues;

Returns a statement resource if the SQL statement was issued successfully, or &false; if the database failed to execute the SQL statement.

&reftitle.examples;

### Creating a table with `db2_exec`

The following example uses `db2_exec` to issue a set of DDL statements in the process of creating a table.

    <?php
    $conn = db2_connect($database, $user, $password);

    // Create the test table
    $create = 'CREATE TABLE animals (id INTEGER, breed VARCHAR(32),
        name CHAR(16), weight DECIMAL(7,2))';
    $result = db2_exec($conn, $create);
    if ($result) {
        print "Successfully created the table.\n";
    }

    // Populate the test table
    $animals = array(
        array(0, 'cat', 'Pook', 3.2),
        array(1, 'dog', 'Peaches', 12.3),
        array(2, 'horse', 'Smarty', 350.0),
        array(3, 'gold fish', 'Bubbles', 0.1),
        array(4, 'budgerigar', 'Gizmo', 0.2),
        array(5, 'goat', 'Rickety Ride', 9.7),
        array(6, 'llama', 'Sweater', 150)
    );

    foreach ($animals as $animal) {
        $rc = db2_exec($conn, "INSERT INTO animals (id, breed, name, weight)
          VALUES ({$animal[0]}, '{$animal[1]}', '{$animal[2]}', {$animal[3]})");
        if ($rc) {
            print "Insert... ";
        }
    }
    ?>

&example.outputs;

    Successfully created the table.
    Insert... Insert... Insert... Insert... Insert... Insert... Insert...

### Executing a SELECT statement with a scrollable cursor

The following example demonstrates how to request a scrollable cursor for an SQL statement issued by `db2_exec`.

    <?php
    $conn = db2_connect($database, $user, $password);
    $sql = "SELECT name FROM animals
        WHERE weight < 10.0
        ORDER BY name";
    if ($conn) {
        require_once 'prepare.inc';
        $stmt = db2_exec($conn, $sql, array('cursor' => DB2_SCROLLABLE));
        while ($row = db2_fetch_array($stmt)) {
            print "$row[0]\n";
        }
    }
    ?>

&example.outputs;

    Bubbles
    Gizmo
    Pook
    Rickety Ride

### Returning XML data as an SQL ResultSet

The following example demonstrates how to work with documents stored in a XML column using the SAMPLE database. Using some pretty simple SQL/XML, this example returns some of the nodes in a XML document in an SQL ResultSet format that most users are familiar with.

    <?php

    $conn = db2_connect("SAMPLE", "db2inst1", "ibmdb2");

    $query = 'SELECT * FROM XMLTABLE(
        XMLNAMESPACES (DEFAULT \'http://posample.org\'),
        \'db2-fn:xmlcolumn("CUSTOMER.INFO")/customerinfo\'
        COLUMNS
        "CID" VARCHAR (50) PATH \'@Cid\',
        "NAME" VARCHAR (50) PATH \'name\',
        "PHONE" VARCHAR (50) PATH \'phone [ @type = "work"]\'
        ) AS T
        WHERE NAME = \'Kathy Smith\'
        ';
    $stmt = db2_exec($conn, $query);

    while($row = db2_fetch_object($stmt)){
        printf("$row->CID     $row->NAME     $row->PHONE\n");
    }
    db2_close($conn);

    ?>

&example.outputs;

    1000     Kathy Smith     416-555-1358
    1001     Kathy Smith     905-555-7258

### Performing a "JOIN" with XML data

The following example works with documents stored in 2 different XML columns in the SAMPLE database. It creates 2 temporary tables from the XML documents from 2 different columns and returns an SQL ResultSet with information regarding shipping status for the customer.

    <?php

    $conn = db2_connect("SAMPLE", "db2inst1", "ibmdb2");

    $query = '
        SELECT A.CID, A.NAME, A.PHONE, C.PONUM, C.STATUS
        FROM
        XMLTABLE(
        XMLNAMESPACES (DEFAULT \'http://posample.org\'),
        \'db2-fn:xmlcolumn("CUSTOMER.INFO")/customerinfo\'
        COLUMNS
        "CID" BIGINT PATH \'@Cid\',
        "NAME" VARCHAR (50) PATH \'name\',
        "PHONE" VARCHAR (50) PATH \'phone [ @type = "work"]\'
        ) as A,
        PURCHASEORDER AS B,
        XMLTABLE (
        XMLNAMESPACES (DEFAULT \'http://posample.org\'),
        \'db2-fn:xmlcolumn("PURCHASEORDER.PORDER")/PurchaseOrder\'
        COLUMNS
        "PONUM"  BIGINT PATH \'@PoNum\',
        "STATUS" VARCHAR (50) PATH \'@Status\'
        ) as C
        WHERE A.CID = B.CUSTID AND
        B.POID = C.PONUM AND
        A.NAME = \'Kathy Smith\'
    ';

    $stmt = db2_exec($conn, $query);

    while($row = db2_fetch_object($stmt)){
        printf("$row->CID     $row->NAME     $row->PHONE     $row->PONUM     $row->STATUS\n");
    }

    db2_close($conn);

    ?>

&example.outputs;

    1001     Kathy Smith     905-555-7258     5002     Shipped

### Returning SQL data as part of a larger XML document

The following example works with a portion of the PRODUCT.DESCRIPTION documents in the SAMPLE database. It creates a XML document containing product description (XML data) and pricing info (SQL data).

    <?php

    $conn = db2_connect("SAMPLE", "db2inst1", "ibmdb2");

    $query = '
    SELECT
    XMLSERIALIZE(
    XMLQUERY(\'
        declare boundary-space strip;
        declare default element namespace "http://posample.org";
        <promoList> {
        for $prod in $doc/product
        where $prod/description/price < 10.00
        order by $prod/description/price ascending
        return(
            <promoitem> {
            $prod,
            <startdate> {$start} </startdate>,
            <enddate> {$end} </enddate>,
            <promoprice> {$promo} </promoprice>
            } </promoitem>
        )
        } </promoList>
    \' passing by ref DESCRIPTION AS "doc",
    PROMOSTART as "start",
    PROMOEND as "end",
    PROMOPRICE as "promo"
    RETURNING SEQUENCE)
    AS CLOB (32000))
    AS NEW_PRODUCT_INFO
    FROM PRODUCT
    WHERE PID = \'100-100-01\'
    ';

    $stmt = db2_exec($conn, $query);

    while($row = db2_fetch_array($stmt)){
        printf("$row[0]\n");
    }
    db2_close($conn);

    ?>

&example.outputs;

    <promoList xmlns="http://posample.org">
        <promoitem>
        <product pid="100-100-01">
            <description>
                <name>Snow Shovel, Basic 22 inch</name>
                <details>Basic Snow Shovel, 22 inches wide, straight handle with D-Grip</details>
                <price>9.99</price>
                <weight>1 kg</weight>
            </description>
        </product>
        <startdate>2004-11-19</startdate>
        <enddate>2004-12-19</enddate>
        <promoprice>7.25</promoprice>
        </promoitem>
    </promoList>

&reftitle.seealso;

- `db2_execute`
- `db2_prepare`