function DatabaseSelectTestCase::testUnion

Test that we can UNION multiple Select queries together. This is semantically equal to UNION DISTINCT, so we don't explicitly test that.

File

modules/simpletest/tests/database_test.test, line 1676

Class

DatabaseSelectTestCase

Test the SELECT builder.

Code

function testUnion() {
  $query_1 = db_select('test', 't')->fields('t', array(
    'name',
  ))
    ->condition('age', array(
    27,
    28,
  ), 'IN');
  $query_2 = db_select('test', 't')->fields('t', array(
    'name',
  ))
    ->condition('age', 28)
    ->orderBy('name');
  $query_1->union($query_2);
  $names = $query_1->execute()
    ->fetchCol();
  // Ensure we only get 2 records.
  $this->assertEqual(count($names), 2, 'UNION correctly discarded duplicates.');
  $this->assertEqual($names[0], 'George', 'First query returned correct name.');
  $this->assertEqual($names[1], 'Ringo', 'Second query returned correct name.');
}