Home » API reference » Drupal 6 » database.mysql-common.inc

db_add_index

6 database.mysql-common.inc db_add_index(&$ret, $table, $name, $fields)
6 database.pgsql.inc db_add_index(&$ret, $table, $name, $fields)
7 database.inc db_add_index($table, $name, $fields)
8 database.inc db_add_index($table, $name, $fields)

Add an index.

Parameters

$ret: Array to which query results will be added.

$table: The table to be altered.

$name: The name of the index.

$fields: An array of field names.

Related topics

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.

236 functions call db_add_index()

File

drupal/includes/database.mysql-common.inc, line 440
Functions shared between mysql and mysqli database engines.

Code

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