wp-includes/class-wp-tax-query.php:505Identifies an existing table alias that is compatible with the current query clause.
$clausearray$parent_queryarraystring|false protected function find_compatible_table_alias( $clause, $parent_query ) { $alias = false; // Confidence check. Only IN queries use the JOIN syntax. if ( ! isset( $clause['operator'] ) || 'IN' !== $clause['operator'] ) { return $alias; } // Since we're only checking IN queries, we're only concerned with OR relations. if ( ! isset( $parent_query['relation'] ) || 'OR' !== $parent_query['relation'] ) { return $alias; } $compatible_operators = array( 'IN' ); foreach ( $parent_query as $sibling ) { if ( ! is_array( $sibling ) || ! $this->is_first_order_clause( $sibling ) ) { continue; } if ( empty( $sibling['alias'] ) || empty( $sibling['operator'] ) ) { continue; } // The sibling must both have compatible operator to share its alias. if ( in_array( strtoupper( $sibling['operator'] ), $compatible_operators, true ) ) { $alias = preg_replace( '/\W/', '_', $sibling['alias'] ); break; } } return $alias; }Introduced in 4.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-tax-query.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.