db2_exec
(PECL ibm_db2:1.0-1.6.2) db2_exec —
Executes an SQL statement directly
Description
resource db2_exec
( resource $connection
, string $statement
[, array $options
] )
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.
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.
-
cursor
-
Passing the DB2_FORWARD_ONLY value requests a
forward-only cursor for this SQL statement. This is the default
type of cursor, and it is supported by all database servers. It is
also much faster than a scrollable cursor.
Passing the DB2_SCROLLABLE value requests a
scrollable cursor for this SQL statement. This type of cursor
enables you to fetch rows non-sequentially from the database
server. However, it is only supported by DB2 servers, and is much
slower than forward-only cursors.
Return Values
Returns a statement resource if the SQL statement was issued successfully,
or FALSE if the database failed to execute the SQL statement.
Examples
Example #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.
<?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... ";
}
}
?>
The above example will output:
Successfully created the table.
Insert... Insert... Insert... Insert... Insert... Insert... Insert...
Example #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().
<?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";
}
}
?>
The above example will output:
Bubbles
Gizmo
Pook
Rickety Ride
Example #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.
<?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);
?>
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 a 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);
?>
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 = \'100-100-01\'
';
$stmt = db2_exec($conn, $query);
while($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>
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