The 5th Annual China PHP Conference



(PECL maxdb >= 1.0)

maxdb_stmt_result_metadata -- maxdb_stmt::result_metadataReturns result set metadata from a prepared statement


Estilo por procedimientos

resource maxdb_stmt_result_metadata ( resource $stmt )

Estilo orientado a objetos

resource maxdb_stmt::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.


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()


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().

Valores devueltos

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


Ejemplo #1 Estilo orientado a objetos

= 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 */

Ejemplo #2 Estilo por procedimientos


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 */

El resultado del ejemplo sería algo similar a:

Fieldname: ID

Ver también

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top