sl@0: # 2002 May 24
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: # This file implements regression tests for SQLite library.
sl@0: #
sl@0: # This file implements tests for joins, including outer joins.
sl@0: #
sl@0: # $Id: join.test,v 1.25 2008/08/14 00:19:49 drh Exp $
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: do_test join-1.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t1(a,b,c);
sl@0:     INSERT INTO t1 VALUES(1,2,3);
sl@0:     INSERT INTO t1 VALUES(2,3,4);
sl@0:     INSERT INTO t1 VALUES(3,4,5);
sl@0:     SELECT * FROM t1;
sl@0:   }  
sl@0: } {1 2 3 2 3 4 3 4 5}
sl@0: do_test join-1.2 {
sl@0:   execsql {
sl@0:     CREATE TABLE t2(b,c,d);
sl@0:     INSERT INTO t2 VALUES(1,2,3);
sl@0:     INSERT INTO t2 VALUES(2,3,4);
sl@0:     INSERT INTO t2 VALUES(3,4,5);
sl@0:     SELECT * FROM t2;
sl@0:   }  
sl@0: } {1 2 3 2 3 4 3 4 5}
sl@0: 
sl@0: do_test join-1.3 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 NATURAL JOIN t2;
sl@0:   }
sl@0: } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}
sl@0: do_test join-1.3.1 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t2 NATURAL JOIN t1;
sl@0:   }
sl@0: } {b 2 c 3 d 4 a 1 b 3 c 4 d 5 a 2}
sl@0: do_test join-1.3.2 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t2 AS x NATURAL JOIN t1;
sl@0:   }
sl@0: } {b 2 c 3 d 4 a 1 b 3 c 4 d 5 a 2}
sl@0: do_test join-1.3.3 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t2 NATURAL JOIN t1 AS y;
sl@0:   }
sl@0: } {b 2 c 3 d 4 a 1 b 3 c 4 d 5 a 2}
sl@0: do_test join-1.3.4 {
sl@0:   execsql {
sl@0:     SELECT b FROM t1 NATURAL JOIN t2;
sl@0:   }
sl@0: } {2 3}
sl@0: do_test join-1.4.1 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 INNER JOIN t2 USING(b,c);
sl@0:   }
sl@0: } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}
sl@0: do_test join-1.4.2 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 AS x INNER JOIN t2 USING(b,c);
sl@0:   }
sl@0: } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}
sl@0: do_test join-1.4.3 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 INNER JOIN t2 AS y USING(b,c);
sl@0:   }
sl@0: } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}
sl@0: do_test join-1.4.4 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 AS x INNER JOIN t2 AS y USING(b,c);
sl@0:   }
sl@0: } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}
sl@0: do_test join-1.4.5 {
sl@0:   execsql {
sl@0:     SELECT b FROM t1 JOIN t2 USING(b);
sl@0:   }
sl@0: } {2 3}
sl@0: do_test join-1.5 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 INNER JOIN t2 USING(b);
sl@0:   }
sl@0: } {a 1 b 2 c 3 c 3 d 4 a 2 b 3 c 4 c 4 d 5}
sl@0: do_test join-1.6 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 INNER JOIN t2 USING(c);
sl@0:   }
sl@0: } {a 1 b 2 c 3 b 2 d 4 a 2 b 3 c 4 b 3 d 5}
sl@0: do_test join-1.7 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 INNER JOIN t2 USING(c,b);
sl@0:   }
sl@0: } {a 1 b 2 c 3 d 4 a 2 b 3 c 4 d 5}
sl@0: 
sl@0: do_test join-1.8 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 NATURAL CROSS JOIN t2;
sl@0:   }
sl@0: } {1 2 3 4 2 3 4 5}
sl@0: do_test join-1.9 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 CROSS JOIN t2 USING(b,c);
sl@0:   }
sl@0: } {1 2 3 4 2 3 4 5}
sl@0: do_test join-1.10 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 NATURAL INNER JOIN t2;
sl@0:   }
sl@0: } {1 2 3 4 2 3 4 5}
sl@0: do_test join-1.11 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 INNER JOIN t2 USING(b,c);
sl@0:   }
sl@0: } {1 2 3 4 2 3 4 5}
sl@0: do_test join-1.12 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 natural inner join t2;
sl@0:   }
sl@0: } {1 2 3 4 2 3 4 5}
sl@0: 
sl@0: ifcapable subquery {
sl@0:   do_test join-1.13 {
sl@0:     execsql2 {
sl@0:       SELECT * FROM t1 NATURAL JOIN 
sl@0:         (SELECT b as 'c', c as 'd', d as 'e' FROM t2) as t3
sl@0:     }
sl@0:   } {a 1 b 2 c 3 d 4 e 5}
sl@0:   do_test join-1.14 {
sl@0:     execsql2 {
sl@0:       SELECT * FROM (SELECT b as 'c', c as 'd', d as 'e' FROM t2) as 'tx'
sl@0:           NATURAL JOIN t1
sl@0:     }
sl@0:   } {c 3 d 4 e 5 a 1 b 2}
sl@0: }
sl@0: 
sl@0: do_test join-1.15 {
sl@0:   execsql {
sl@0:     CREATE TABLE t3(c,d,e);
sl@0:     INSERT INTO t3 VALUES(2,3,4);
sl@0:     INSERT INTO t3 VALUES(3,4,5);
sl@0:     INSERT INTO t3 VALUES(4,5,6);
sl@0:     SELECT * FROM t3;
sl@0:   }  
sl@0: } {2 3 4 3 4 5 4 5 6}
sl@0: do_test join-1.16 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 natural join t2 natural join t3;
sl@0:   }
sl@0: } {1 2 3 4 5 2 3 4 5 6}
sl@0: do_test join-1.17 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 natural join t2 natural join t3;
sl@0:   }
sl@0: } {a 1 b 2 c 3 d 4 e 5 a 2 b 3 c 4 d 5 e 6}
sl@0: do_test join-1.18 {
sl@0:   execsql {
sl@0:     CREATE TABLE t4(d,e,f);
sl@0:     INSERT INTO t4 VALUES(2,3,4);
sl@0:     INSERT INTO t4 VALUES(3,4,5);
sl@0:     INSERT INTO t4 VALUES(4,5,6);
sl@0:     SELECT * FROM t4;
sl@0:   }  
sl@0: } {2 3 4 3 4 5 4 5 6}
sl@0: do_test join-1.19.1 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 natural join t2 natural join t4;
sl@0:   }
sl@0: } {1 2 3 4 5 6}
sl@0: do_test join-1.19.2 {
sl@0:   execsql2 {
sl@0:     SELECT * FROM t1 natural join t2 natural join t4;
sl@0:   }
sl@0: } {a 1 b 2 c 3 d 4 e 5 f 6}
sl@0: do_test join-1.20 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 natural join t2 natural join t3 WHERE t1.a=1
sl@0:   }
sl@0: } {1 2 3 4 5}
sl@0: 
sl@0: do_test join-2.1 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 NATURAL LEFT JOIN t2;
sl@0:   }
sl@0: } {1 2 3 4 2 3 4 5 3 4 5 {}}
sl@0: do_test join-2.2 {
sl@0:   execsql {
sl@0:     SELECT * FROM t2 NATURAL LEFT OUTER JOIN t1;
sl@0:   }
sl@0: } {1 2 3 {} 2 3 4 1 3 4 5 2}
sl@0: do_test join-2.3 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 NATURAL RIGHT OUTER JOIN t2;
sl@0:   }
sl@0: } {1 {RIGHT and FULL OUTER JOINs are not currently supported}}
sl@0: do_test join-2.4 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.d
sl@0:   }
sl@0: } {1 2 3 {} {} {} 2 3 4 {} {} {} 3 4 5 1 2 3}
sl@0: do_test join-2.5 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.d WHERE t1.a>1
sl@0:   }
sl@0: } {2 3 4 {} {} {} 3 4 5 1 2 3}
sl@0: do_test join-2.6 {
sl@0:   execsql {
sl@0:     SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.d WHERE t2.b IS NULL OR t2.b>1
sl@0:   }
sl@0: } {1 2 3 {} {} {} 2 3 4 {} {} {}}
sl@0: 
sl@0: do_test join-3.1 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 NATURAL JOIN t2 ON t1.a=t2.b;
sl@0:   }
sl@0: } {1 {a NATURAL join may not have an ON or USING clause}}
sl@0: do_test join-3.2 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 NATURAL JOIN t2 USING(b);
sl@0:   }
sl@0: } {1 {a NATURAL join may not have an ON or USING clause}}
sl@0: do_test join-3.3 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 JOIN t2 ON t1.a=t2.b USING(b);
sl@0:   }
sl@0: } {1 {cannot have both ON and USING clauses in the same join}}
sl@0: do_test join-3.4.1 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 JOIN t2 USING(a);
sl@0:   }
sl@0: } {1 {cannot join using column a - column not present in both tables}}
sl@0: do_test join-3.4.2 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 JOIN t2 USING(d);
sl@0:   }
sl@0: } {1 {cannot join using column d - column not present in both tables}}
sl@0: do_test join-3.5 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 USING(a);
sl@0:   }
sl@0: } {0 {1 2 3 2 3 4 3 4 5}}
sl@0: do_test join-3.6 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 JOIN t2 ON t3.a=t2.b;
sl@0:   }
sl@0: } {1 {no such column: t3.a}}
sl@0: do_test join-3.7 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 INNER OUTER JOIN t2;
sl@0:   }
sl@0: } {1 {unknown or unsupported join type: INNER OUTER}}
sl@0: do_test join-3.8 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 INNER OUTER CROSS JOIN t2;
sl@0:   }
sl@0: } {1 {unknown or unsupported join type: INNER OUTER CROSS}}
sl@0: do_test join-3.9 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 OUTER NATURAL INNER JOIN t2;
sl@0:   }
sl@0: } {1 {unknown or unsupported join type: OUTER NATURAL INNER}}
sl@0: do_test join-3.10 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 LEFT BOGUS JOIN t2;
sl@0:   }
sl@0: } {1 {unknown or unsupported join type: LEFT BOGUS}}
sl@0: do_test join-3.11 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 INNER BOGUS CROSS JOIN t2;
sl@0:   }
sl@0: } {1 {unknown or unsupported join type: INNER BOGUS CROSS}}
sl@0: do_test join-3.12 {
sl@0:   catchsql {
sl@0:     SELECT * FROM t1 NATURAL AWK SED JOIN t2;
sl@0:   }
sl@0: } {1 {unknown or unsupported join type: NATURAL AWK SED}}
sl@0: 
sl@0: do_test join-4.1 {
sl@0:   execsql {
sl@0:     BEGIN;
sl@0:     CREATE TABLE t5(a INTEGER PRIMARY KEY);
sl@0:     CREATE TABLE t6(a INTEGER);
sl@0:     INSERT INTO t6 VALUES(NULL);
sl@0:     INSERT INTO t6 VALUES(NULL);
sl@0:     INSERT INTO t6 SELECT * FROM t6;
sl@0:     INSERT INTO t6 SELECT * FROM t6;
sl@0:     INSERT INTO t6 SELECT * FROM t6;
sl@0:     INSERT INTO t6 SELECT * FROM t6;
sl@0:     INSERT INTO t6 SELECT * FROM t6;
sl@0:     INSERT INTO t6 SELECT * FROM t6;
sl@0:     COMMIT;
sl@0:   }
sl@0:   execsql {
sl@0:     SELECT * FROM t6 NATURAL JOIN t5;
sl@0:   }
sl@0: } {}
sl@0: do_test join-4.2 {
sl@0:   execsql {
sl@0:     SELECT * FROM t6, t5 WHERE t6.a<t5.a;
sl@0:   }
sl@0: } {}
sl@0: do_test join-4.3 {
sl@0:   execsql {
sl@0:     SELECT * FROM t6, t5 WHERE t6.a>t5.a;
sl@0:   }
sl@0: } {}
sl@0: do_test join-4.4 {
sl@0:   execsql {
sl@0:     UPDATE t6 SET a='xyz';
sl@0:     SELECT * FROM t6 NATURAL JOIN t5;
sl@0:   }
sl@0: } {}
sl@0: do_test join-4.6 {
sl@0:   execsql {
sl@0:     SELECT * FROM t6, t5 WHERE t6.a<t5.a;
sl@0:   }
sl@0: } {}
sl@0: do_test join-4.7 {
sl@0:   execsql {
sl@0:     SELECT * FROM t6, t5 WHERE t6.a>t5.a;
sl@0:   }
sl@0: } {}
sl@0: do_test join-4.8 {
sl@0:   execsql {
sl@0:     UPDATE t6 SET a=1;
sl@0:     SELECT * FROM t6 NATURAL JOIN t5;
sl@0:   }
sl@0: } {}
sl@0: do_test join-4.9 {
sl@0:   execsql {
sl@0:     SELECT * FROM t6, t5 WHERE t6.a<t5.a;
sl@0:   }
sl@0: } {}
sl@0: do_test join-4.10 {
sl@0:   execsql {
sl@0:     SELECT * FROM t6, t5 WHERE t6.a>t5.a;
sl@0:   }
sl@0: } {}
sl@0: 
sl@0: do_test join-5.1 {
sl@0:   execsql {
sl@0:     BEGIN;
sl@0:     create table centros (id integer primary key, centro);
sl@0:     INSERT INTO centros VALUES(1,'xxx');
sl@0:     create table usuarios (id integer primary key, nombre, apellidos,
sl@0:     idcentro integer);
sl@0:     INSERT INTO usuarios VALUES(1,'a','aa',1);
sl@0:     INSERT INTO usuarios VALUES(2,'b','bb',1);
sl@0:     INSERT INTO usuarios VALUES(3,'c','cc',NULL);
sl@0:     create index idcentro on usuarios (idcentro);
sl@0:     END;
sl@0:     select usuarios.id, usuarios.nombre, centros.centro from
sl@0:     usuarios left outer join centros on usuarios.idcentro = centros.id;
sl@0:   }
sl@0: } {1 a xxx 2 b xxx 3 c {}}
sl@0: 
sl@0: # A test for ticket #247.
sl@0: #
sl@0: do_test join-7.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t7 (x, y);
sl@0:     INSERT INTO t7 VALUES ("pa1", 1);
sl@0:     INSERT INTO t7 VALUES ("pa2", NULL);
sl@0:     INSERT INTO t7 VALUES ("pa3", NULL);
sl@0:     INSERT INTO t7 VALUES ("pa4", 2);
sl@0:     INSERT INTO t7 VALUES ("pa30", 131);
sl@0:     INSERT INTO t7 VALUES ("pa31", 130);
sl@0:     INSERT INTO t7 VALUES ("pa28", NULL);
sl@0: 
sl@0:     CREATE TABLE t8 (a integer primary key, b);
sl@0:     INSERT INTO t8 VALUES (1, "pa1");
sl@0:     INSERT INTO t8 VALUES (2, "pa4");
sl@0:     INSERT INTO t8 VALUES (3, NULL);
sl@0:     INSERT INTO t8 VALUES (4, NULL);
sl@0:     INSERT INTO t8 VALUES (130, "pa31");
sl@0:     INSERT INTO t8 VALUES (131, "pa30");
sl@0: 
sl@0:     SELECT coalesce(t8.a,999) from t7 LEFT JOIN t8 on y=a;
sl@0:   }
sl@0: } {1 999 999 2 131 130 999}
sl@0: 
sl@0: # Make sure a left join where the right table is really a view that
sl@0: # is itself a join works right.  Ticket #306.
sl@0: #
sl@0: ifcapable view {
sl@0: do_test join-8.1 {
sl@0:   execsql {
sl@0:     BEGIN;
sl@0:     CREATE TABLE t9(a INTEGER PRIMARY KEY, b);
sl@0:     INSERT INTO t9 VALUES(1,11);
sl@0:     INSERT INTO t9 VALUES(2,22);
sl@0:     CREATE TABLE t10(x INTEGER PRIMARY KEY, y);
sl@0:     INSERT INTO t10 VALUES(1,2);
sl@0:     INSERT INTO t10 VALUES(3,3);    
sl@0:     CREATE TABLE t11(p INTEGER PRIMARY KEY, q);
sl@0:     INSERT INTO t11 VALUES(2,111);
sl@0:     INSERT INTO t11 VALUES(3,333);    
sl@0:     CREATE VIEW v10_11 AS SELECT x, q FROM t10, t11 WHERE t10.y=t11.p;
sl@0:     COMMIT;
sl@0:     SELECT * FROM t9 LEFT JOIN v10_11 ON( a=x );
sl@0:   }
sl@0: } {1 11 1 111 2 22 {} {}}
sl@0: ifcapable subquery {
sl@0:   do_test join-8.2 {
sl@0:     execsql {
sl@0:       SELECT * FROM t9 LEFT JOIN (SELECT x, q FROM t10, t11 WHERE t10.y=t11.p)
sl@0:            ON( a=x);
sl@0:     }
sl@0:   } {1 11 1 111 2 22 {} {}}
sl@0: }
sl@0: do_test join-8.3 {
sl@0:   execsql {
sl@0:     SELECT * FROM v10_11 LEFT JOIN t9 ON( a=x );
sl@0:   }
sl@0: } {1 111 1 11 3 333 {} {}}
sl@0: ifcapable subquery {
sl@0:   # Constant expressions in a subquery that is the right element of a
sl@0:   # LEFT JOIN evaluate to NULL for rows where the LEFT JOIN does not
sl@0:   # match.  Ticket #3300
sl@0:   do_test join-8.4 {
sl@0:     execsql {
sl@0:       SELECT * FROM t9 LEFT JOIN (SELECT 44, p, q FROM t11) AS sub1 ON p=a
sl@0:     }
sl@0:   } {1 11 {} {} {} 2 22 44 2 111}
sl@0: }
sl@0: } ;# ifcapable view
sl@0: 
sl@0: # Ticket #350 describes a scenario where LEFT OUTER JOIN does not
sl@0: # function correctly if the right table in the join is really
sl@0: # subquery.
sl@0: #
sl@0: # To test the problem, we generate the same LEFT OUTER JOIN in two
sl@0: # separate selects but with on using a subquery and the other calling
sl@0: # the table directly.  Then connect the two SELECTs using an EXCEPT.
sl@0: # Both queries should generate the same results so the answer should
sl@0: # be an empty set.
sl@0: #
sl@0: ifcapable compound {
sl@0: do_test join-9.1 {
sl@0:   execsql {
sl@0:     BEGIN;
sl@0:     CREATE TABLE t12(a,b);
sl@0:     INSERT INTO t12 VALUES(1,11);
sl@0:     INSERT INTO t12 VALUES(2,22);
sl@0:     CREATE TABLE t13(b,c);
sl@0:     INSERT INTO t13 VALUES(22,222);
sl@0:     COMMIT;
sl@0:   }
sl@0: } {}
sl@0: 
sl@0: ifcapable subquery {
sl@0:   do_test join-9.1.1 {
sl@0:     execsql {
sl@0:       SELECT * FROM t12 NATURAL LEFT JOIN t13
sl@0:       EXCEPT
sl@0:       SELECT * FROM t12 NATURAL LEFT JOIN (SELECT * FROM t13 WHERE b>0);
sl@0:     }
sl@0:   } {}
sl@0: }
sl@0: ifcapable view {
sl@0:   do_test join-9.2 {
sl@0:     execsql {
sl@0:       CREATE VIEW v13 AS SELECT * FROM t13 WHERE b>0;
sl@0:       SELECT * FROM t12 NATURAL LEFT JOIN t13
sl@0:         EXCEPT
sl@0:         SELECT * FROM t12 NATURAL LEFT JOIN v13;
sl@0:     }
sl@0:   } {}
sl@0: } ;# ifcapable view
sl@0: } ;# ifcapable compound
sl@0: 
sl@0: ifcapable subquery {
sl@0:   # Ticket #1697:  Left Join WHERE clause terms that contain an
sl@0:   # aggregate subquery.
sl@0:   #
sl@0:   do_test join-10.1 {
sl@0:     execsql {
sl@0:       CREATE TABLE t21(a,b,c);
sl@0:       CREATE TABLE t22(p,q);
sl@0:       CREATE INDEX i22 ON t22(q);
sl@0:       SELECT a FROM t21 LEFT JOIN t22 ON b=p WHERE q=
sl@0:          (SELECT max(m.q) FROM t22 m JOIN t21 n ON n.b=m.p WHERE n.c=1);
sl@0:     }  
sl@0:   } {}
sl@0: 
sl@0:   # Test a LEFT JOIN when the right-hand side of hte join is an empty
sl@0:   # sub-query. Seems fine.
sl@0:   #
sl@0:   do_test join-10.2 {
sl@0:     execsql {
sl@0:       CREATE TABLE t23(a, b, c);
sl@0:       CREATE TABLE t24(a, b, c);
sl@0:       INSERT INTO t23 VALUES(1, 2, 3);
sl@0:     }
sl@0:     execsql {
sl@0:       SELECT * FROM t23 LEFT JOIN t24;
sl@0:     }
sl@0:   } {1 2 3 {} {} {}}
sl@0:   do_test join-10.3 {
sl@0:     execsql {
sl@0:       SELECT * FROM t23 LEFT JOIN (SELECT * FROM t24);
sl@0:     }
sl@0:   } {1 2 3 {} {} {}}
sl@0: 
sl@0: } ;# ifcapable subquery
sl@0: 
sl@0: finish_test