DatabaseSQLTest.php

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<?php
 
use Wikimedia\Rdbms\LikeMatch;
 
class DatabaseSQLTest extends MediaWikiTestCase {
    private $database;
 
    protected function setUp() {
        parent::setUp();
        $this->database = new DatabaseTestHelper( __CLASS__, [ 'cliMode' => true ] );
    }
 
    protected function assertLastSql( $sqlText ) {
        $this->assertEquals(
            $this->database->getLastSqls(),
            $sqlText
        );
    }
 
    protected function assertLastSqlDb( $sqlText, $db ) {
        $this->assertEquals( $db->getLastSqls(), $sqlText );
    }
 
    public function testSelect( $sql, $sqlText ) {
        $this->database->select(
            $sql['tables'],
            $sql['fields'],
            isset( $sql['conds'] ) ? $sql['conds'] : [],
            __METHOD__,
            isset( $sql['options'] ) ? $sql['options'] : [],
            isset( $sql['join_conds'] ) ? $sql['join_conds'] : []
        );
        $this->assertLastSql( $sqlText );
    }
 
    public static function provideSelect() {
        return [
            [
                [
                    'tables' => 'table',
                    'fields' => [ 'field', 'alias' => 'field2' ],
                    'conds' => [ 'alias' => 'text' ],
                ],
                "SELECT field,field2 AS alias " .
                    "FROM table " .
                    "WHERE alias = 'text'"
            ],
            [
                [
                    'tables' => 'table',
                    'fields' => [ 'field', 'alias' => 'field2' ],
                    'conds' => [ 'alias' => 'text' ],
                    'options' => [ 'LIMIT' => 1, 'ORDER BY' => 'field' ],
                ],
                "SELECT field,field2 AS alias " .
                    "FROM table " .
                    "WHERE alias = 'text' " .
                    "ORDER BY field " .
                    "LIMIT 1"
            ],
            [
                [
                    'tables' => [ 'table', 't2' => 'table2' ],
                    'fields' => [ 'tid', 'field', 'alias' => 'field2', 't2.id' ],
                    'conds' => [ 'alias' => 'text' ],
                    'options' => [ 'LIMIT' => 1, 'ORDER BY' => 'field' ],
                    'join_conds' => [ 't2' => [
                        'LEFT JOIN', 'tid = t2.id'
                    ] ],
                ],
                "SELECT tid,field,field2 AS alias,t2.id " .
                    "FROM table LEFT JOIN table2 t2 ON ((tid = t2.id)) " .
                    "WHERE alias = 'text' " .
                    "ORDER BY field " .
                    "LIMIT 1"
            ],
            [
                [
                    'tables' => [ 'table', 't2' => 'table2' ],
                    'fields' => [ 'tid', 'field', 'alias' => 'field2', 't2.id' ],
                    'conds' => [ 'alias' => 'text' ],
                    'options' => [ 'LIMIT' => 1, 'GROUP BY' => 'field', 'HAVING' => 'COUNT(*) > 1' ],
                    'join_conds' => [ 't2' => [
                        'LEFT JOIN', 'tid = t2.id'
                    ] ],
                ],
                "SELECT tid,field,field2 AS alias,t2.id " .
                    "FROM table LEFT JOIN table2 t2 ON ((tid = t2.id)) " .
                    "WHERE alias = 'text' " .
                    "GROUP BY field HAVING COUNT(*) > 1 " .
                    "LIMIT 1"
            ],
            [
                [
                    'tables' => [ 'table', 't2' => 'table2' ],
                    'fields' => [ 'tid', 'field', 'alias' => 'field2', 't2.id' ],
                    'conds' => [ 'alias' => 'text' ],
                    'options' => [
                        'LIMIT' => 1,
                        'GROUP BY' => [ 'field', 'field2' ],
                        'HAVING' => [ 'COUNT(*) > 1', 'field' => 1 ]
                    ],
                    'join_conds' => [ 't2' => [
                        'LEFT JOIN', 'tid = t2.id'
                    ] ],
                ],
                "SELECT tid,field,field2 AS alias,t2.id " .
                    "FROM table LEFT JOIN table2 t2 ON ((tid = t2.id)) " .
                    "WHERE alias = 'text' " .
                    "GROUP BY field,field2 HAVING (COUNT(*) > 1) AND field = '1' " .
                    "LIMIT 1"
            ],
            [
                [
                    'tables' => [ 'table' ],
                    'fields' => [ 'alias' => 'field' ],
                    'conds' => [ 'alias' => [ 1, 2, 3, 4 ] ],
                ],
                "SELECT field AS alias " .
                    "FROM table " .
                    "WHERE alias IN ('1','2','3','4')"
            ],
        ];
    }
 
    public function testUpdate( $sql, $sqlText ) {
        $this->database->update(
            $sql['table'],
            $sql['values'],
            $sql['conds'],
            __METHOD__,
            isset( $sql['options'] ) ? $sql['options'] : []
        );
        $this->assertLastSql( $sqlText );
    }
 
    public static function provideUpdate() {
        return [
            [
                [
                    'table' => 'table',
                    'values' => [ 'field' => 'text', 'field2' => 'text2' ],
                    'conds' => [ 'alias' => 'text' ],
                ],
                "UPDATE table " .
                    "SET field = 'text'" .
                    ",field2 = 'text2' " .
                    "WHERE alias = 'text'"
            ],
            [
                [
                    'table' => 'table',
                    'values' => [ 'field = other', 'field2' => 'text2' ],
                    'conds' => [ 'id' => '1' ],
                ],
                "UPDATE table " .
                    "SET field = other" .
                    ",field2 = 'text2' " .
                    "WHERE id = '1'"
            ],
            [
                [
                    'table' => 'table',
                    'values' => [ 'field = other', 'field2' => 'text2' ],
                    'conds' => '*',
                ],
                "UPDATE table " .
                    "SET field = other" .
                    ",field2 = 'text2'"
            ],
        ];
    }
 
    public function testDelete( $sql, $sqlText ) {
        $this->database->delete(
            $sql['table'],
            $sql['conds'],
            __METHOD__
        );
        $this->assertLastSql( $sqlText );
    }
 
    public static function provideDelete() {
        return [
            [
                [
                    'table' => 'table',
                    'conds' => [ 'alias' => 'text' ],
                ],
                "DELETE FROM table " .
                    "WHERE alias = 'text'"
            ],
            [
                [
                    'table' => 'table',
                    'conds' => '*',
                ],
                "DELETE FROM table"
            ],
        ];
    }
 
    public function testUpsert( $sql, $sqlText ) {
        $this->database->upsert(
            $sql['table'],
            $sql['rows'],
            $sql['uniqueIndexes'],
            $sql['set'],
            __METHOD__
        );
        $this->assertLastSql( $sqlText );
    }
 
    public static function provideUpsert() {
        return [
            [
                [
                    'table' => 'upsert_table',
                    'rows' => [ 'field' => 'text', 'field2' => 'text2' ],
                    'uniqueIndexes' => [ 'field' ],
                    'set' => [ 'field' => 'set' ],
                ],
                "BEGIN; " .
                    "UPDATE upsert_table " .
                    "SET field = 'set' " .
                    "WHERE ((field = 'text')); " .
                    "INSERT IGNORE INTO upsert_table " .
                    "(field,field2) " .
                    "VALUES ('text','text2'); " .
                    "COMMIT"
            ],
        ];
    }
 
    public function testDeleteJoin( $sql, $sqlText ) {
        $this->database->deleteJoin(
            $sql['delTable'],
            $sql['joinTable'],
            $sql['delVar'],
            $sql['joinVar'],
            $sql['conds'],
            __METHOD__
        );
        $this->assertLastSql( $sqlText );
    }
 
    public static function provideDeleteJoin() {
        return [
            [
                [
                    'delTable' => 'table',
                    'joinTable' => 'table_join',
                    'delVar' => 'field',
                    'joinVar' => 'field_join',
                    'conds' => [ 'alias' => 'text' ],
                ],
                "DELETE FROM table " .
                    "WHERE field IN (" .
                    "SELECT field_join FROM table_join WHERE alias = 'text'" .
                    ")"
            ],
            [
                [
                    'delTable' => 'table',
                    'joinTable' => 'table_join',
                    'delVar' => 'field',
                    'joinVar' => 'field_join',
                    'conds' => '*',
                ],
                "DELETE FROM table " .
                    "WHERE field IN (" .
                    "SELECT field_join FROM table_join " .
                    ")"
            ],
        ];
    }
 
    public function testInsert( $sql, $sqlText ) {
        $this->database->insert(
            $sql['table'],
            $sql['rows'],
            __METHOD__,
            isset( $sql['options'] ) ? $sql['options'] : []
        );
        $this->assertLastSql( $sqlText );
    }
 
    public static function provideInsert() {
        return [
            [
                [
                    'table' => 'table',
                    'rows' => [ 'field' => 'text', 'field2' => 2 ],
                ],
                "INSERT INTO table " .
                    "(field,field2) " .
                    "VALUES ('text','2')"
            ],
            [
                [
                    'table' => 'table',
                    'rows' => [ 'field' => 'text', 'field2' => 2 ],
                    'options' => 'IGNORE',
                ],
                "INSERT IGNORE INTO table " .
                    "(field,field2) " .
                    "VALUES ('text','2')"
            ],
            [
                [
                    'table' => 'table',
                    'rows' => [
                        [ 'field' => 'text', 'field2' => 2 ],
                        [ 'field' => 'multi', 'field2' => 3 ],
                    ],
                    'options' => 'IGNORE',
                ],
                "INSERT IGNORE INTO table " .
                    "(field,field2) " .
                    "VALUES " .
                    "('text','2')," .
                    "('multi','3')"
            ],
        ];
    }
 
    public function testInsertSelect( $sql, $sqlTextNative, $sqlSelect, $sqlInsert ) {
        $this->database->insertSelect(
            $sql['destTable'],
            $sql['srcTable'],
            $sql['varMap'],
            $sql['conds'],
            __METHOD__,
            isset( $sql['insertOptions'] ) ? $sql['insertOptions'] : [],
            isset( $sql['selectOptions'] ) ? $sql['selectOptions'] : []
        );
        $this->assertLastSql( $sqlTextNative );
 
        $dbWeb = new DatabaseTestHelper( __CLASS__, [ 'cliMode' => false ] );
        $dbWeb->forceNextResult( [
            array_flip( array_keys( $sql['varMap'] ) )
        ] );
        $dbWeb->insertSelect(
            $sql['destTable'],
            $sql['srcTable'],
            $sql['varMap'],
            $sql['conds'],
            __METHOD__,
            isset( $sql['insertOptions'] ) ? $sql['insertOptions'] : [],
            isset( $sql['selectOptions'] ) ? $sql['selectOptions'] : []
        );
        $this->assertLastSqlDb( implode( '; ', [ $sqlSelect, $sqlInsert ] ), $dbWeb );
    }
 
    public static function provideInsertSelect() {
        return [
            [
                [
                    'destTable' => 'insert_table',
                    'srcTable' => 'select_table',
                    'varMap' => [ 'field_insert' => 'field_select', 'field' => 'field2' ],
                    'conds' => '*',
                ],
                "INSERT INTO insert_table " .
                    "(field_insert,field) " .
                    "SELECT field_select,field2 " .
                    "FROM select_table",
                "SELECT field_select AS field_insert,field2 AS field " .
                "FROM select_table WHERE *   FOR UPDATE",
                "INSERT INTO insert_table (field_insert,field) VALUES ('0','1')"
            ],
            [
                [
                    'destTable' => 'insert_table',
                    'srcTable' => 'select_table',
                    'varMap' => [ 'field_insert' => 'field_select', 'field' => 'field2' ],
                    'conds' => [ 'field' => 2 ],
                ],
                "INSERT INTO insert_table " .
                    "(field_insert,field) " .
                    "SELECT field_select,field2 " .
                    "FROM select_table " .
                    "WHERE field = '2'",
                "SELECT field_select AS field_insert,field2 AS field FROM " .
                "select_table WHERE field = '2'   FOR UPDATE",
                "INSERT INTO insert_table (field_insert,field) VALUES ('0','1')"
            ],
            [
                [
                    'destTable' => 'insert_table',
                    'srcTable' => 'select_table',
                    'varMap' => [ 'field_insert' => 'field_select', 'field' => 'field2' ],
                    'conds' => [ 'field' => 2 ],
                    'insertOptions' => 'IGNORE',
                    'selectOptions' => [ 'ORDER BY' => 'field' ],
                ],
                "INSERT IGNORE INTO insert_table " .
                    "(field_insert,field) " .
                    "SELECT field_select,field2 " .
                    "FROM select_table " .
                    "WHERE field = '2' " .
                    "ORDER BY field",
                "SELECT field_select AS field_insert,field2 AS field " .
                "FROM select_table WHERE field = '2' ORDER BY field  FOR UPDATE",
                "INSERT IGNORE INTO insert_table (field_insert,field) VALUES ('0','1')"
            ],
        ];
    }
 
    public function testReplace( $sql, $sqlText ) {
        $this->database->replace(
            $sql['table'],
            $sql['uniqueIndexes'],
            $sql['rows'],
            __METHOD__
        );
        $this->assertLastSql( $sqlText );
    }
 
    public static function provideReplace() {
        return [
            [
                [
                    'table' => 'replace_table',
                    'uniqueIndexes' => [ 'field' ],
                    'rows' => [ 'field' => 'text', 'field2' => 'text2' ],
                ],
                "DELETE FROM replace_table " .
                    "WHERE ( field='text' ); " .
                    "INSERT INTO replace_table " .
                    "(field,field2) " .
                    "VALUES ('text','text2')"
            ],
            [
                [
                    'table' => 'module_deps',
                    'uniqueIndexes' => [ [ 'md_module', 'md_skin' ] ],
                    'rows' => [
                        'md_module' => 'module',
                        'md_skin' => 'skin',
                        'md_deps' => 'deps',
                    ],
                ],
                "DELETE FROM module_deps " .
                    "WHERE ( md_module='module' AND md_skin='skin' ); " .
                    "INSERT INTO module_deps " .
                    "(md_module,md_skin,md_deps) " .
                    "VALUES ('module','skin','deps')"
            ],
            [
                [
                    'table' => 'module_deps',
                    'uniqueIndexes' => [ [ 'md_module', 'md_skin' ] ],
                    'rows' => [
                        [
                            'md_module' => 'module',
                            'md_skin' => 'skin',
                            'md_deps' => 'deps',
                        ], [
                            'md_module' => 'module2',
                            'md_skin' => 'skin2',
                            'md_deps' => 'deps2',
                        ],
                    ],
                ],
                "DELETE FROM module_deps " .
                    "WHERE ( md_module='module' AND md_skin='skin' ); " .
                    "INSERT INTO module_deps " .
                    "(md_module,md_skin,md_deps) " .
                    "VALUES ('module','skin','deps'); " .
                    "DELETE FROM module_deps " .
                    "WHERE ( md_module='module2' AND md_skin='skin2' ); " .
                    "INSERT INTO module_deps " .
                    "(md_module,md_skin,md_deps) " .
                    "VALUES ('module2','skin2','deps2')"
            ],
            [
                [
                    'table' => 'module_deps',
                    'uniqueIndexes' => [ 'md_module', 'md_skin' ],
                    'rows' => [
                        [
                            'md_module' => 'module',
                            'md_skin' => 'skin',
                            'md_deps' => 'deps',
                        ], [
                            'md_module' => 'module2',
                            'md_skin' => 'skin2',
                            'md_deps' => 'deps2',
                        ],
                    ],
                ],
                "DELETE FROM module_deps " .
                    "WHERE ( md_module='module' ) OR ( md_skin='skin' ); " .
                    "INSERT INTO module_deps " .
                    "(md_module,md_skin,md_deps) " .
                    "VALUES ('module','skin','deps'); " .
                    "DELETE FROM module_deps " .
                    "WHERE ( md_module='module2' ) OR ( md_skin='skin2' ); " .
                    "INSERT INTO module_deps " .
                    "(md_module,md_skin,md_deps) " .
                    "VALUES ('module2','skin2','deps2')"
            ],
            [
                [
                    'table' => 'module_deps',
                    'uniqueIndexes' => [],
                    'rows' => [
                        'md_module' => 'module',
                        'md_skin' => 'skin',
                        'md_deps' => 'deps',
                    ],
                ],
                "INSERT INTO module_deps " .
                    "(md_module,md_skin,md_deps) " .
                    "VALUES ('module','skin','deps')"
            ],
        ];
    }
 
    public function testNativeReplace( $sql, $sqlText ) {
        $this->database->nativeReplace(
            $sql['table'],
            $sql['rows'],
            __METHOD__
        );
        $this->assertLastSql( $sqlText );
    }
 
    public static function provideNativeReplace() {
        return [
            [
                [
                    'table' => 'replace_table',
                    'rows' => [ 'field' => 'text', 'field2' => 'text2' ],
                ],
                "REPLACE INTO replace_table " .
                    "(field,field2) " .
                    "VALUES ('text','text2')"
            ],
        ];
    }
 
    public function testConditional( $sql, $sqlText ) {
        $this->assertEquals( trim( $this->database->conditional(
            $sql['conds'],
            $sql['true'],
            $sql['false']
        ) ), $sqlText );
    }
 
    public static function provideConditional() {
        return [
            [
                [
                    'conds' => [ 'field' => 'text' ],
                    'true' => 1,
                    'false' => 'NULL',
                ],
                "(CASE WHEN field = 'text' THEN 1 ELSE NULL END)"
            ],
            [
                [
                    'conds' => [ 'field' => 'text', 'field2' => 'anothertext' ],
                    'true' => 1,
                    'false' => 'NULL',
                ],
                "(CASE WHEN field = 'text' AND field2 = 'anothertext' THEN 1 ELSE NULL END)"
            ],
            [
                [
                    'conds' => 'field=1',
                    'true' => 1,
                    'false' => 'NULL',
                ],
                "(CASE WHEN field=1 THEN 1 ELSE NULL END)"
            ],
        ];
    }
 
    public function testBuildConcat( $stringList, $sqlText ) {
        $this->assertEquals( trim( $this->database->buildConcat(
            $stringList
        ) ), $sqlText );
    }
 
    public static function provideBuildConcat() {
        return [
            [
                [ 'field', 'field2' ],
                "CONCAT(field,field2)"
            ],
            [
                [ "'test'", 'field2' ],
                "CONCAT('test',field2)"
            ],
        ];
    }
 
    public function testBuildLike( $array, $sqlText ) {
        $this->assertEquals( trim( $this->database->buildLike(
            $array
        ) ), $sqlText );
    }
 
    public static function provideBuildLike() {
        return [
            [
                'text',
                "LIKE 'text' ESCAPE '`'"
            ],
            [
                [ 'text', new LikeMatch( '%' ) ],
                "LIKE 'text%' ESCAPE '`'"
            ],
            [
                [ 'text', new LikeMatch( '%' ), 'text2' ],
                "LIKE 'text%text2' ESCAPE '`'"
            ],
            [
                [ 'text', new LikeMatch( '_' ) ],
                "LIKE 'text_' ESCAPE '`'"
            ],
            [
                'more_text',
                "LIKE 'more`_text' ESCAPE '`'"
            ],
            [
                [ 'C:\\Windows\\', new LikeMatch( '%' ) ],
                "LIKE 'C:\\Windows\\%' ESCAPE '`'"
            ],
            [
                [ 'accent`_test`', new LikeMatch( '%' ) ],
                "LIKE 'accent```_test``%' ESCAPE '`'"
            ],
        ];
    }
 
    public function testUnionQueries( $sql, $sqlText ) {
        $this->assertEquals( trim( $this->database->unionQueries(
            $sql['sqls'],
            $sql['all']
        ) ), $sqlText );
    }
 
    public static function provideUnionQueries() {
        return [
            [
                [
                    'sqls' => [ 'RAW SQL', 'RAW2SQL' ],
                    'all' => true,
                ],
                "(RAW SQL) UNION ALL (RAW2SQL)"
            ],
            [
                [
                    'sqls' => [ 'RAW SQL', 'RAW2SQL' ],
                    'all' => false,
                ],
                "(RAW SQL) UNION (RAW2SQL)"
            ],
            [
                [
                    'sqls' => [ 'RAW SQL', 'RAW2SQL', 'RAW3SQL' ],
                    'all' => false,
                ],
                "(RAW SQL) UNION (RAW2SQL) UNION (RAW3SQL)"
            ],
        ];
    }
 
    public function testTransactionCommit() {
        $this->database->begin( __METHOD__ );
        $this->database->commit( __METHOD__ );
        $this->assertLastSql( 'BEGIN; COMMIT' );
    }
 
    public function testTransactionRollback() {
        $this->database->begin( __METHOD__ );
        $this->database->rollback( __METHOD__ );
        $this->assertLastSql( 'BEGIN; ROLLBACK' );
    }
 
    public function testDropTable() {
        $this->database->setExistingTables( [ 'table' ] );
        $this->database->dropTable( 'table', __METHOD__ );
        $this->assertLastSql( 'DROP TABLE table CASCADE' );
    }
 
    public function testDropNonExistingTable() {
        $this->assertFalse(
            $this->database->dropTable( 'non_existing', __METHOD__ )
        );
    }
 
    public function testMakeList( $list, $mode, $sqlText ) {
        $this->assertEquals( trim( $this->database->makeList(
            $list, $mode
        ) ), $sqlText );
    }
 
    public static function provideMakeList() {
        return [
            [
                [ 'value', 'value2' ],
                LIST_COMMA,
                "'value','value2'"
            ],
            [
                [ 'field', 'field2' ],
                LIST_NAMES,
                "field,field2"
            ],
            [
                [ 'field' => 'value', 'field2' => 'value2' ],
                LIST_AND,
                "field = 'value' AND field2 = 'value2'"
            ],
            [
                [ 'field' => null, "field2 != 'value2'" ],
                LIST_AND,
                "field IS NULL AND (field2 != 'value2')"
            ],
            [
                [ 'field' => [ 'value', null, 'value2' ], 'field2' => 'value2' ],
                LIST_AND,
                "(field IN ('value','value2')  OR field IS NULL) AND field2 = 'value2'"
            ],
            [
                [ 'field' => [ null ], 'field2' => null ],
                LIST_AND,
                "field IS NULL AND field2 IS NULL"
            ],
            [
                [ 'field' => 'value', 'field2' => 'value2' ],
                LIST_OR,
                "field = 'value' OR field2 = 'value2'"
            ],
            [
                [ 'field' => 'value', 'field2' => null ],
                LIST_OR,
                "field = 'value' OR field2 IS NULL"
            ],
            [
                [ 'field' => [ 'value', 'value2' ], 'field2' => [ 'value' ] ],
                LIST_OR,
                "field IN ('value','value2')  OR field2 = 'value'"
            ],
            [
                [ 'field' => [ null, 'value', null, 'value2' ], "field2 != 'value2'" ],
                LIST_OR,
                "(field IN ('value','value2')  OR field IS NULL) OR (field2 != 'value2')"
            ],
            [
                [ 'field' => 'value', 'field2' => 'value2' ],
                LIST_SET,
                "field = 'value',field2 = 'value2'"
            ],
            [
                [ 'field' => 'value', 'field2' => null ],
                LIST_SET,
                "field = 'value',field2 = NULL"
            ],
            [
                [ 'field' => 'value', "field2 != 'value2'" ],
                LIST_SET,
                "field = 'value',field2 != 'value2'"
            ],
        ];
    }
 
    public function testSessionTempTables() {
        $temp1 = $this->database->tableName( 'tmp_table_1' );
        $temp2 = $this->database->tableName( 'tmp_table_2' );
        $temp3 = $this->database->tableName( 'tmp_table_3' );
 
        $this->database->query( "CREATE TEMPORARY TABLE $temp1 LIKE orig_tbl", __METHOD__ );
        $this->database->query( "CREATE TEMPORARY TABLE $temp2 LIKE orig_tbl", __METHOD__ );
        $this->database->query( "CREATE TEMPORARY TABLE $temp3 LIKE orig_tbl", __METHOD__ );
 
        $this->assertTrue( $this->database->tableExists( "tmp_table_1", __METHOD__ ) );
        $this->assertTrue( $this->database->tableExists( "tmp_table_2", __METHOD__ ) );
        $this->assertTrue( $this->database->tableExists( "tmp_table_3", __METHOD__ ) );
 
        $this->database->dropTable( 'tmp_table_1', __METHOD__ );
        $this->database->dropTable( 'tmp_table_2', __METHOD__ );
        $this->database->dropTable( 'tmp_table_3', __METHOD__ );
 
        $this->assertFalse( $this->database->tableExists( "tmp_table_1", __METHOD__ ) );
        $this->assertFalse( $this->database->tableExists( "tmp_table_2", __METHOD__ ) );
        $this->assertFalse( $this->database->tableExists( "tmp_table_3", __METHOD__ ) );
 
        $this->database->query( "CREATE TEMPORARY TABLE tmp_table_1 LIKE orig_tbl", __METHOD__ );
        $this->database->query( "CREATE TEMPORARY TABLE 'tmp_table_2' LIKE orig_tbl", __METHOD__ );
        $this->database->query( "CREATE TEMPORARY TABLE `tmp_table_3` LIKE orig_tbl", __METHOD__ );
 
        $this->assertTrue( $this->database->tableExists( "tmp_table_1", __METHOD__ ) );
        $this->assertTrue( $this->database->tableExists( "tmp_table_2", __METHOD__ ) );
        $this->assertTrue( $this->database->tableExists( "tmp_table_3", __METHOD__ ) );
 
        $this->database->query( "DROP TEMPORARY TABLE tmp_table_1 LIKE orig_tbl", __METHOD__ );
        $this->database->query( "DROP TEMPORARY TABLE 'tmp_table_2' LIKE orig_tbl", __METHOD__ );
        $this->database->query( "DROP TABLE `tmp_table_3` LIKE orig_tbl", __METHOD__ );
 
        $this->assertFalse( $this->database->tableExists( "tmp_table_1", __METHOD__ ) );
        $this->assertFalse( $this->database->tableExists( "tmp_table_2", __METHOD__ ) );
        $this->assertFalse( $this->database->tableExists( "tmp_table_3", __METHOD__ ) );
    }
}