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maxdb_stmt_result_metadata

(PECL maxdb:1.0-7.6.00.38)

maxdb_stmt_result_metadata — Returns result set metadata from a prepared statement

Описание

Procedural style:

resource maxdb_stmt_result_metadata ( resource $stmt )

Object oriented style (method):

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.

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

• maxdb_num_fields()

• maxdb_fetch_field()

• maxdb_fetch_field_direct()

• maxdb_fetch_fields()

• maxdb_field_count()

• maxdb_field_seek()

• maxdb_field_tell()

• maxdb_free_result()

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

Замечание: 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().

Возвращаемые значения

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

Примеры

Пример #1 Object oriented style

<?php
$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");
$stmt->execute();

/* 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 */
$result->close();

/* close connection */
$maxdb->close();
?>

Пример #2 Procedural style

<?php
$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");
maxdb_stmt_execute($stmt);

/* 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 */
maxdb_free_result($result);

/* close connection */
maxdb_close($link);
?>

The above examples would produce the following output:

Fieldname: ID

  

Смотрите также

• maxdb_prepare()
• maxdb_free_result()

maxdb_stmt_reset

maxdb_stmt_send_long_data

MaxDB PHP Функции

PHP Manual