function DatabaseAlterTestCase::testSimpleAlterSubquery

Test that we can do basic alters on subqueries.

File

modules/simpletest/tests/database_test.test, line 3051

Class

DatabaseAlterTestCase

Select alter tests.

Code

function testSimpleAlterSubquery() {
    // Create a sub-query with an alter tag.
    $subquery = db_select('test', 'p');
    $subquery->addField('p', 'name');
    $subquery->addField('p', 'id');
    // Pick out George.
    $subquery->condition('age', 27);
    $subquery->addExpression("age*2", 'double_age');
    // This query alter should change it to age * 3.
    $subquery->addTag('database_test_alter_change_expressions');
    // Create a main query and join to sub-query.
    $query = db_select('test_task', 'tt');
    $query->join($subquery, 'pq', 'pq.id = tt.pid');
    $age_field = $query->addField('pq', 'double_age');
    $name_field = $query->addField('pq', 'name');
    $record = $query->execute()
        ->fetch();
    $this->assertEqual($record->{$name_field}, 'George', 'Fetched name is correct.');
    $this->assertEqual($record->{$age_field}, 27 * 3, 'Fetched age expression is correct.');
}