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PHP : Function Reference : IBM DB2, Cloudscape and Apache Derby Functions : db2_exec

db2_exec

Executes an SQL statement directly (PECL ibm_db2:1.0-1.6.2)
resource db2_exec ( resource connection, string statement [, array options] )

Example 925. 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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<?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:

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

Example 926. 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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<?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:

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Bubbles
Gizmo
Pook
Rickety Ride

Example 927. 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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<?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:

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

Example 928. 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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<?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:

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1001     Kathy Smith     905-555-7258     5002     Shipped

Example 929. 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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<?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:

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<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>

Code Examples / Notes » db2_exec

shawn
If you need to "emulate" offset/limit (as PEAR::DB puts it) for db2 queries, you will definitely need to add array('cursor' => DB2_SCROLLABLE) to your db2_exec() call. Otherwise, you will get nothing useful from db2_fetch_{whatever}() when you try to (see following hack for example):
$limit = 10;
$offset = 20;
for ($i = 0; $i < $limit && $row = db2_fetch_array($result, $offset + $i); $i++) {
   // stuff goes here
}
You can accomplish the same time of thing using sub-selects, "with" statements and other things new to me in the world of DB2, but the more dynamically generated the queries, the more difficult it gets to implement limit/offset behavior on the fly.

duc
if you have the error message : PHP Warning:  db2_exec() [<a href='function.db2-exec'>function.db2-exec</a>]: Statement Execute Failed in (....)
and cannot display the error message using db2_stmt_errormsg() , then check if your database connection handle is (still) valid

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db2_bind_param
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db2_close
db2_column_privileges
db2_columns
db2_commit
db2_conn_error
db2_conn_errormsg
db2_connect
db2_cursor_type
db2_escape_string
db2_exec
db2_execute
db2_fetch_array
db2_fetch_assoc
db2_fetch_both
db2_fetch_object
db2_fetch_row
db2_field_display_size
db2_field_name
db2_field_num
db2_field_precision
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db2_field_width
db2_foreign_keys
db2_free_result
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db2_get_option
db2_lob_read
db2_next_result
db2_num_fields
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db2_pconnect
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db2_rollback
db2_server_info
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