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   1. drupal6
   2. drupal6 database.pgsql.inc
   3. drupal7 database.inc

Add a unique key.

Übergabeparameter

$ret Array to which query results will be added.

$table The table to be altered.

$name The name of the key.

$fields An array of field names.

Verwandte Themen

Schema API

A Drupal schema definition is an array structure representing one or more tables and their related keys and indexes. A schema is defined by hook_schema(), which usually lives in a modulename.install file.

Code

includes/database.mysql-common.inc, line 410

<?php
function db_add_unique_key(&$ret, $table, $name, $fields) {
  $ret[] = update_sql('ALTER TABLE {' . $table . '} ADD UNIQUE KEY ' .
    $name . ' (' . _db_create_key_sql($fields) . ')');
}
?>