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Last updated: Tue, 19 Sep 2006



maxdb_stmt_result_metadata -- Returns result set metadata from a prepared statement


Procedural style:

resource maxdb_stmt_result_metadata ( resource stmt )

Object oriented style (method):

class stmt {

resource result_metadata ( void )


If a statement passed to maxdb_prepare() is one that produces a result set, maxdb_stmt_result_metadata() returns the result resource that can be used to process the meta information such as total number of fields and individual field information.

Note: This result set pointer can be passed as an argument to any of the field-based functions that process result set metadata, such as:

The result set structure should be freed when you are done with it, which you can do by passing it to maxdb_free_result()

Note: The result set returned by maxdb_stmt_result_metadata() contains only metadata. It does not contain any row results. The rows are obtained by using the statement handle with maxdb_fetch().

Return Values

maxdb_stmt_result_metadata() returns a result resource or FALSE if an error occured.


Example 1. Object oriented style

$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

$maxdb->query("CREATE TABLE temp.friends (id int, name varchar(20))"); 
$maxdb->query("INSERT INTO temp.friends VALUES (1,'Hartmut')");
$maxdb->query("INSERT INTO temp.friends VALUES (2, 'Ulf')");

$stmt = $maxdb->prepare("SELECT id, name FROM temp.friends");

/* get resultset for metadata */
$result = $stmt->result_metadata();

/* retrieve field information from metadata result set */
$field = $result->fetch_field();

printf("Fieldname: %s\n", $field->name);

/* close resultset */

/* close connection */

Example 2. Procedural style

$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

maxdb_query($link, "CREATE TABLE temp.friends (id int, name varchar(20))"); 
maxdb_query($link, "INSERT INTO temp.friends VALUES (1,'Hartmut')");
maxdb_query($link, "INSERT INTO temp.friends VALUES (2, 'Ulf')");

$stmt = maxdb_prepare($link, "SELECT id, name FROM temp.friends");

/* get resultset for metadata */
$result = maxdb_stmt_result_metadata($stmt);

/* retrieve field information from metadata result set */
$field = maxdb_fetch_field($result);

printf("Fieldname: %s\n", $field->name);

/* close resultset */

/* close connection */

The above examples would produce the following output:

Fieldname: ID

Last updated: Tue, 19 Sep 2006