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db2_execute

(PECL ibm_db2 >= 1.0.0)

db2_execute — Executes a prepared SQL statement

Description

db2_execute(resource $stmt, array $parameters = []): bool

db2_execute() executes an SQL statement that was prepared by db2_prepare().

If the SQL statement returns a result set, for example, a SELECT statement or a CALL to a stored procedure that returns one or more result sets, you can retrieve a row as an array from the stmt resource using db2_fetch_assoc(), db2_fetch_both(), or db2_fetch_array(). Alternatively, you can use db2_fetch_row() to move the result set pointer to the next row and fetch a column at a time from that row with db2_result().

Refer to db2_prepare() for a brief discussion of the advantages of using db2_prepare() and db2_execute() rather than db2_exec().

Parameters

stmt: A prepared statement returned from db2_prepare().
parameters: An array of input parameters matching any parameter markers contained in the prepared statement.

Return Values

Returns true on success or false on failure.

Examples

Example #1 Preparing and executing an SQL statement with parameter markers

The following example prepares an INSERT statement that accepts four parameter markers, then iterates over an array of arrays containing the input values to be passed to db2_execute().

<?php
$pet = array(0, 'cat', 'Pook', 3.2);

$insert = 'INSERT INTO animals (id, breed, name, weight)
    VALUES (?, ?, ?, ?)';

$stmt = db2_prepare($conn, $insert);
if ($stmt) {
$result = db2_execute($stmt, $pet);
    if ($result) {
        print "Successfully added new pet.";
    }
}
?>

The above example will output:

Successfully added new pet.

Example #2 Calling a stored procedure with an OUT parameter

The following example prepares a CALL statement that accepts one parameter marker representing an OUT parameter, binds the PHP variable $my_pets to the parameter using db2_bind_param(), then issues db2_execute() to execute the CALL statement. After the CALL to the stored procedure has been made, the value of $num_pets changes to reflect the value returned by the stored procedure for that OUT parameter.

<?php
$num_pets = 0;
$res = db2_prepare($conn, "CALL count_my_pets(?)");
$rc = db2_bind_param($res, 1, "num_pets", DB2_PARAM_OUT);
$rc = db2_execute($res);
print "I have $num_pets pets!";
?>

The above example will output:

I have 7 pets!

Example #3 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 = ?
    ';

$stmt = db2_prepare($conn, $query);

$name = 'Kathy Smith';

if ($stmt) {
db2_bind_param($stmt, 1, "name", DB2_PARAM_IN);
db2_execute($stmt);

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

?>

The above example will output:

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

Example #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 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 = ?
';

$stmt = db2_prepare($conn, $query);

$name = 'Kathy Smith';

if ($stmt) {
db2_bind_param($stmt, 1, "name", DB2_PARAM_IN);
db2_execute($stmt);

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

db2_close($conn);

?>

The above example will output:

1001     Kathy Smith     905-555-7258     5002     Shipped

Example #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).

<?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 = ?
';

$stmt = db2_prepare($conn, $query);

$pid = "100-100-01";

if ($stmt) {
db2_bind_param($stmt, 1, "pid", DB2_PARAM_IN);
db2_execute($stmt);

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

db2_close($conn);

?>

The above example will output:

<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>

See Also

db2_exec() - Executes an SQL statement directly
db2_fetch_array() - Returns an array, indexed by column position, representing a row in a result set
db2_fetch_assoc() - Returns an array, indexed by column name, representing a row in a result set
db2_fetch_both() - Returns an array, indexed by both column name and position, representing a row in a result set
db2_fetch_row() - Sets the result set pointer to the next row or requested row
db2_prepare() - Prepares an SQL statement to be executed
db2_result() - Returns a single column from a row in the result set

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User Contributed Notes 1 note

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stefanov at uk dot ibm dot com ¶

8 years ago

You CANNOT bind parameters for table and/or column names. Binding parameters only works for values:

YES: $sqlQuery = "UPDATE ".TB_NAME." SET ".CN_NAME." = ? WHERE DAY = ?";
NO: $sqlQuery = "UPDATE ? SET ? = ? WHERE DAY = ?";

Any attempt to bind column or table names will result in the following error during db2_execute():
PHP Warning:  db2_bind_param(): Describe Param Failed in ...