WordPress at a glance
function is not described

drop_index() WP 1.0.1

Drops a specified index from a table.

  • Global. wpdb. $wpdb

No Hooks.


true. True, when finished.


drop_index( $table, $index );
$table(string) (required)
Database table name.
$index(string) (required)
Index name to drop.

Code of drop index: wp-admin/includes/upgrade.php VER 5.0.3

function drop_index($table, $index) {
	global $wpdb;
	$wpdb->query("ALTER TABLE `$table` DROP INDEX `$index`");
	// Now we need to take out all the extra ones we may have created
	for ($i = 0; $i < 25; $i++) {
		$wpdb->query("ALTER TABLE `$table` DROP INDEX `{$index}_$i`");
	return true;