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Use multiple JOINs instead of CASE in _wp_meta_sql(). See #14572 

git-svn-id: http://svn.automattic.com/wordpress/trunk@15580 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
scribu 2010-09-06 11:04:50 +00:00
parent 6fd94cd065
commit c27d704999
2 changed files with 32 additions and 22 deletions
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45
wp-includes/functions.php
View File

@ -4243,10 +4243,13 @@ function _wp_search_sql($string, $cols) {
* @since 3.1.0
*
* @param array $queries An array of queries
* @param string $meta_id_column The column that holds the object id
* @return string
* @param string $primary_table
* @param string $primary_id_column
* @param string $meta_table
* @param string $meta_id_column
* @return array( $join_sql, $where_sql )
*/
function _wp_meta_sql( $queries, $meta_id_column ) {
function _wp_meta_sql( $queries, $primary_table, $primary_id_column, $meta_table, $meta_id_column ) {
global $wpdb;
$clauses = array();
@ -4262,29 +4265,39 @@ function _wp_meta_sql( $queries, $meta_id_column ) {
if ( empty( $meta_key ) )
continue;
$clause = $wpdb->prepare( "WHEN %s THEN meta_value ", $meta_key );
if ( empty( $meta_value ) ) {
$clauses[] = $clause . "IS NOT NULL";
$clauses[ $meta_key ] = "";
} elseif ( 'like' == $meta_compare ) {
$clauses[] = $clause . $wpdb->prepare( "LIKE %s", '%' . like_escape( $meta_value ) . '%' );
$clauses[ $meta_key ] = $wpdb->prepare( "LIKE %s", '%' . like_escape( $meta_value ) . '%' );
} else {
$clauses[] = $clause . $wpdb->prepare( "$meta_compare %s", $meta_value );
$clauses[ $meta_key ] = $wpdb->prepare( "$meta_compare %s", $meta_value );
}
}
if ( empty( $clauses ) )
return '';
return array('', '');
return "
AND CASE meta_key
" . implode( "\n", $clauses ) . "
END
GROUP BY $meta_id_column
HAVING COUNT(*) = " . count( $clauses );
$join = '';
$where = '';
$i = 0;
foreach ( $clauses as $meta_key => $value_query ) {
$alias = $i ? 'mt' . $i : $meta_table;
$join .= "\nINNER JOIN $meta_table";
$join .= $i ? " AS $alias" : '';
$join .= " ON ($primary_table.$primary_id_column = $alias.$meta_id_column)";
$where .= $wpdb->prepare( " AND $alias.meta_key = %s", $meta_key );
if ( !empty( $value_query ) )
$where .= " AND $alias.meta_value $value_query";
$i++;
}
return array( $join, $where );
}
/*
* Used internally to tidy up the search terms
*

9
wp-includes/user.php
View File

@ -463,12 +463,9 @@ class WP_User_Query {
$meta_queries[] = wp_array_slice_assoc( $qv, array( 'meta_key', 'meta_value', 'meta_compare' ) );
$meta_query_sql = _wp_meta_sql( $meta_queries, 'user_id' );
if ( !empty( $meta_query_sql ) ) {
$this->query_from .= " INNER JOIN $wpdb->usermeta ON ($wpdb->users.ID = $wpdb->usermeta.user_id)";
$this->query_where .= $meta_query_sql;
}
list( $meta_join, $meta_where ) = _wp_meta_sql( $meta_queries, $wpdb->users, 'ID', $wpdb->usermeta, 'user_id' );
$this->query_from .= $meta_join;
$this->query_where .= $meta_where;
if ( !empty($qv['include']) ) {
$ids = implode( ',', wp_parse_id_list( $qv['include'] ) );