You are here

Home » API reference » Drupal 7 » select.inc » SelectQueryInterface

public function SelectQueryInterface::getUnion in Drupal 7

Returns a reference to the union queries for this query. This include queries for UNION, UNION ALL, and UNION DISTINCT.

Because this method returns by reference, alter hooks may edit the tables array directly to make their changes. If just adding union queries, however, the use of the union() method is preferred.

Note that this method must be called by reference as well:

$fields =& $query
  ->getUnion();

Return value

A reference to the union query array structure.

2 methods override SelectQueryInterface::getUnion()
SelectQuery::getUnion in includes/database/select.inc
Returns a reference to the union queries for this query. This include queries for UNION, UNION ALL, and UNION DISTINCT.
SelectQueryExtender::getUnion in includes/database/select.inc
Returns a reference to the union queries for this query. This include queries for UNION, UNION ALL, and UNION DISTINCT.

File

includes/database/select.inc, line 150

Class

SelectQueryInterface
Interface definition for a Select Query object.

Code

public function &getUnion();