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MDL-46171 dml: DML unit test for tricky SQL in assign upgrade

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This tests a workaround for set_field_select where the set table and from table are the same.
This commit is contained in:
Damyon Wiese
2014-09-30 23:35:37 +08:00
parent 93c51a1d0a
commit 0cc1ee1f30
1 changed files with 29 additions and 0 deletions
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lib/dml/tests/dml_test.php
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@@ -4200,6 +4200,35 @@ class core_dml_testcase extends database_driver_testcase {
}
/**
* Test some complicated variations of set_field_select.
*/
public function test_set_field_select_complicated() {
$DB = $this->tdb;
$dbman = $DB->get_manager();
$table = $this->get_test_table();
$tablename = $table->getName();
$table->add_field('id', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
$table->add_field('course', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, '0');
$table->add_field('name', XMLDB_TYPE_CHAR, '255', null, null, null, null);
$table->add_field('content', XMLDB_TYPE_TEXT, 'big', null, XMLDB_NOTNULL);
$table->add_key('primary', XMLDB_KEY_PRIMARY, array('id'));
$dbman->create_table($table);
$DB->insert_record($tablename, array('course' => 3, 'content' => 'hello', 'name'=>'xyz'));
$DB->insert_record($tablename, array('course' => 3, 'content' => 'world', 'name'=>'abc'));
$DB->insert_record($tablename, array('course' => 5, 'content' => 'hello', 'name'=>'def'));
$DB->insert_record($tablename, array('course' => 2, 'content' => 'universe', 'name'=>'abc'));
// This SQL is a tricky case because we are selecting from the same table we are updating.
$sql = 'id IN (SELECT outerq.id from (SELECT innerq.id from {' . $tablename . '} innerq WHERE course = 3) outerq)';
$DB->set_field_select($tablename, 'name', 'ghi', $sql);
$this->assertSame(2, $DB->count_records_select($tablename, 'name = ?', array('ghi')));
}
/**
* Test some more complex SQL syntax which moodle uses and depends on to work
* useful to determine if new database libraries can be supported.