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PDOStatement::getColumnMeta

(no version information, might be only in CVS)

PDOStatement::getColumnMeta --  Returns metadata for a column in a result set

Descripción

mixed PDOStatement::getColumnMeta ( int column )

Aviso

Esta función es EXPERIMENTAL. Esto significa que el comportamiento de esta función, el nombre de esta función y en definitiva TODO lo documentado sobre esta función, puede cambiar en una futura version de PHP SIN AVISO. La advertencia queda hecha, y utilizar esta extensión queda bajo su propia responsabilidad.

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

Aviso

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

Lista de parámetros

column

The 0-indexed column in the result set.

Valores retornados

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

Tabla 1. Column metadata

NameValue
native_typeThe PHP native type used to represent the column value.
driver:decl_typeThe 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().
flagsAny flags set for this column.
nameThe name of this column as returned by the database.
lenThe length of this column. Normally -1 for types other than floating point decimals.
precisionThe numeric precision of this column. Normally 0 for types other than floating point decimals.
pdo_typeThe 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.

Ejemplos

Ejemplo 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);
?>

El resultado del ejemplo seria:

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

Ver también

PDOStatement::columnCount()
PDOStatement::rowCount()

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PDOStatement::getAttributeSubirPDOStatement::nextRowset

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Generated: 2007-01-26 18:01:04