get_meta_sql filter-hook . WP 3.1.0

Filters the meta query's generated SQL.

Usage

add_filter( 'get_meta_sql', 'filter_function_name_657', 10, 6 );
function filter_function_name_657( $clauses, $queries, $type, $primary_table, $primary_id_column, $context ){
	// filter...

	return $clauses;
}

$clauses(array)

Array containing the query's JOIN and WHERE clauses.

$queries(array)

Array of meta queries.

$type(string)

Type of meta.

$primary_table(string)

Primary table.

$primary_id_column(string)

Primary column ID.

$context(object)

The main query object.

Where the hook is called

return apply_filters_ref_array( 'get_meta_sql', array( $sql, $this->queries, $type, $primary_table, $primary_id_column, $context ) );

Where the hook is used (in WP core)