Ticket #17998: 17998.diff

wp-admin/includes/upgrade.php

@@ -1459 +1459 @@
         $cqueries = apply_filters( 'dbdelta_create_queries', $cqueries );
         $iqueries = apply_filters( 'dbdelta_insert_queries', $iqueries );
 
-        // Check to see which tables and fields exist
-        if ($tables = $wpdb->get_col('SHOW TABLES;')) {
-                // For every table in the database
                 $global_tables = $wpdb->tables( 'global' );
-                foreach ($tables as $table) {
+                foreach ( $cqueries as $table => $who_cares ) {
                         // Upgrade global tables only for the main site. Don't upgrade at all if DO_NOT_UPGRADE_GLOBAL_TABLES is defined.
                         if ( in_array( $table, $global_tables ) && ( !is_main_site() || defined( 'DO_NOT_UPGRADE_GLOBAL_TABLES' ) ) )
                                 continue;
 
-                        // If a table query exists for the database table...
-                        if ( array_key_exists(strtolower($table), $cqueries) ) {
+                        // Fetch the table column structure from the database
+                        $tablefields = $wpdb->get_results("DESCRIBE {$table};");
+
+                        if ( ! $tablefields )
+                                continue;
+
                                 // Clear the field and index arrays
                                 $cfields = $indices = array();
                                 // Get all of the field names in the query from between the parens
@@ -1508 +1509 @@
                                         }
                                 }
 
-                                // Fetch the table column structure from the database
-                                $tablefields = $wpdb->get_results("DESCRIBE {$table};");
-
                                 // For every field in the table
                                 foreach ($tablefields as $tablefield) {
                                         // If the table field exists in the field array...
@@ -1610 +1608 @@
                                 // Remove the original table creation query from processing
                                 unset($cqueries[strtolower($table)]);
                                 unset($for_update[strtolower($table)]);
-                        } else {
-                                // This table exists in the database, but not in the creation queries?
-                        }
                 }
-        }
 
         $allqueries = array_merge($cqueries, $iqueries);
         if ($execute) {