Documentation PHP

PDOStatement->getColumnMeta

(PHP 5 >= 5.1.0, PECL pdo:0.2-1.0.3)

PDOStatement->getColumnMeta — Returns metadata for a column in a result set

Description

array PDOStatement::getColumnMeta ( int $column )
Avertissement

Cette fonction est EXPERIMENTALE. Cela signifie que le comportement de cette fonction, son nom et, concrètement, TOUT ce qui est documenté ici peut changer dans un futur proche, SANS PREAVIS ! Soyez-en conscient, et utilisez cette fonction à vos risques et périls.

Retrieves the metadata for a 0-indexed column in a result set as an associative array.

Avertissement

Not all PDO drivers support PDOStatement::getColumnMeta().

Liste de paramètres

column

The 0-indexed column in the result set.

Valeurs de retour

Returns an associative array containing the following values representing the metadata for a single column:

Column metadata
Name Value
native_type The PHP native type used to represent the column value.
driver:decl_type The SQL type used to represent the column value in the database. If the column in the result set is the result of a function, this value is not returned by PDOStatement::getColumnMeta().
flags Any flags set for this column.
name The name of this column as returned by the database.
table The name of this column's table as returned by the database.
len The length of this column. Normally -1 for types other than floating point decimals.
precision The numeric precision of this column. Normally 0 for types other than floating point decimals.
pdo_type The type of this column as represented by the PDO::PARAM_* constants.

Returns FALSE if the requested column does not exist in the result set, or if no result set exists.

Historique

Version Description
5.2.3 table field

Exemples

Exemple #1 Retrieving column metadata

The following example shows the results of retrieving the metadata for a single column generated by a function (COUNT) in a PDO_SQLITE driver.

<?php
$select 
$DB->query('SELECT COUNT(*) FROM fruit');
$meta $select->getColumnMeta(0);
var_dump($meta);
?>

L'exemple ci-dessus va afficher :

array(6) {
  ["native_type"]=>
  string(7) "integer"
  ["flags"]=>
  array(0) {
  }
  ["name"]=>
  string(8) "COUNT(*)"
  ["len"]=>
  int(-1)
  ["precision"]=>
  int(0)
  ["pdo_type"]=>
  int(2)
}



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