WordPress at a glance
function is not described

upgrade_101() WP 1.0.1

Execute changes made in WordPress 1.0.1.

  • Global. wpdb. $wpdb WordPress database abstraction object.

No Hooks.

Return

Nothing (null).

Usage

upgrade_101();

Code of upgrade 101: wp-admin/includes/upgrade.php VER 5.0.3

<?php
function upgrade_101() {
	global $wpdb;

	// Clean up indices, add a few
	add_clean_index($wpdb->posts, 'post_name');
	add_clean_index($wpdb->posts, 'post_status');
	add_clean_index($wpdb->categories, 'category_nicename');
	add_clean_index($wpdb->comments, 'comment_approved');
	add_clean_index($wpdb->comments, 'comment_post_ID');
	add_clean_index($wpdb->links , 'link_category');
	add_clean_index($wpdb->links , 'link_visible');
}