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db2_exec


(PECL ibm_db2 >= 1.0.0)

db2_exec Executes an SQL statement directly

Beschreibung

resource 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.

Parameter-Liste

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().

Rückgabewerte

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

Beispiele

Beispiel #1 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.

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$conn = db2_connect($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... "; } }

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

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

Beispiel #2 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().

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$conn = db2_connect($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"; } }

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

Bubbles
Gizmo
Pook
Rickety Ride

Beispiel #3 Returning XML data as a 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 a SQL ResultSet format that most users are familiar with.

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$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);

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

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

Beispiel #4 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 a SQL ResultSet with information regarding shipping status for the customer.

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$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);

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

1001     Kathy Smith     905-555-7258     5002     Shipped

Beispiel #5 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).

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$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);

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

<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>

Siehe auch