WordPress at a glance
function is not described

drop_index() WP 1.0.1

Drops a specified index from a table.

No Hooks.

Return

true. True, when finished.

Usage

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

Notes

  • Global. wpdb. $wpdb

Changelog

Since 1.0.1 Introduced.

Code of drop index: wp-admin/includes/upgrade.php WP 5.2.2

<?php
function drop_index( $table, $index ) {
	global $wpdb;
	$wpdb->hide_errors();
	$wpdb->query( "ALTER TABLE `$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`" );
	}
	$wpdb->show_errors();
	return true;
}