# # 2001 September 15 # # The author disclaims copyright to this source code. In place of # a legal notice, here is a blessing: # # May you do good and not evil. # May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # This file implements regression tests for SQLite library. The # focus of this file is testing SELECT statements that contain # subqueries in their FROM clause. # # $Id: select6.test,v 1.11 2004/01/24 20:18:13 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl do_test select6-1.0 { execsql { BEGIN; CREATE TABLE t1(x, y); INSERT INTO t1 VALUES(1,1); INSERT INTO t1 VALUES(2,2); INSERT INTO t1 VALUES(3,2); INSERT INTO t1 VALUES(4,3); INSERT INTO t1 VALUES(5,3); INSERT INTO t1 VALUES(6,3); INSERT INTO t1 VALUES(7,3); INSERT INTO t1 VALUES(8,4); INSERT INTO t1 VALUES(9,4); INSERT INTO t1 VALUES(10,4); INSERT INTO t1 VALUES(11,4); INSERT INTO t1 VALUES(12,4); INSERT INTO t1 VALUES(13,4); INSERT INTO t1 VALUES(14,4); INSERT INTO t1 VALUES(15,4); INSERT INTO t1 VALUES(16,5); INSERT INTO t1 VALUES(17,5); INSERT INTO t1 VALUES(18,5); INSERT INTO t1 VALUES(19,5); INSERT INTO t1 VALUES(20,5); COMMIT; SELECT DISTINCT y FROM t1 ORDER BY y; } } {1 2 3 4 5} do_test select6-1.1 { execsql2 {SELECT * FROM (SELECT x, y FROM t1 WHERE x<2)} } {x 1 y 1} do_test select6-1.2 { execsql {SELECT count(*) FROM (SELECT y FROM t1)} } {20} do_test select6-1.3 { execsql {SELECT count(*) FROM (SELECT DISTINCT y FROM t1)} } {5} do_test select6-1.4 { execsql {SELECT count(*) FROM (SELECT DISTINCT * FROM (SELECT y FROM t1))} } {5} do_test select6-1.5 { execsql {SELECT count(*) FROM (SELECT * FROM (SELECT DISTINCT y FROM t1))} } {5} do_test select6-1.6 { execsql { SELECT * FROM (SELECT count(*),y FROM t1 GROUP BY y) AS a, (SELECT max(x),y FROM t1 GROUP BY y) as b WHERE a.y=b.y ORDER BY a.y } } {1 1 1 1 2 2 3 2 4 3 7 3 8 4 15 4 5 5 20 5} do_test select6-1.7 { execsql { SELECT a.y, a.[count(*)], [max(x)], [count(*)] FROM (SELECT count(*),y FROM t1 GROUP BY y) AS a, (SELECT max(x),y FROM t1 GROUP BY y) as b WHERE a.y=b.y ORDER BY a.y } } {1 1 1 1 2 2 3 2 3 4 7 4 4 8 15 8 5 5 20 5} do_test select6-1.8 { execsql { SELECT q, p, r FROM (SELECT count(*) as p , y as q FROM t1 GROUP BY y) AS a, (SELECT max(x) as r, y as s FROM t1 GROUP BY y) as b WHERE q=s ORDER BY s } } {1 1 1 2 2 3 3 4 7 4 8 15 5 5 20} do_test select6-1.9 { execsql { SELECT q, p, r, b.[min(x)+y] FROM (SELECT count(*) as p , y as q FROM t1 GROUP BY y) AS a, (SELECT max(x) as r, y as s, min(x)+y FROM t1 GROUP BY y) as b WHERE q=s ORDER BY s } } {1 1 1 2 2 2 3 4 3 4 7 7 4 8 15 12 5 5 20 21} do_test select6-2.0 { execsql { CREATE TABLE t2(a INTEGER PRIMARY KEY, b); INSERT INTO t2 SELECT * FROM t1; SELECT DISTINCT b FROM t2 ORDER BY b; } } {1 2 3 4 5} do_test select6-2.1 { execsql2 {SELECT * FROM (SELECT a, b FROM t2 WHERE a<2)} } {a 1 b 1} do_test select6-2.2 { execsql {SELECT count(*) FROM (SELECT b FROM t2)} } {20} do_test select6-2.3 { execsql {SELECT count(*) FROM (SELECT DISTINCT b FROM t2)} } {5} do_test select6-2.4 { execsql {SELECT count(*) FROM (SELECT DISTINCT * FROM (SELECT b FROM t2))} } {5} do_test select6-2.5 { execsql {SELECT count(*) FROM (SELECT * FROM (SELECT DISTINCT b FROM t2))} } {5} do_test select6-2.6 { execsql { SELECT * FROM (SELECT count(*),b FROM t2 GROUP BY b) AS a, (SELECT max(a),b FROM t2 GROUP BY b) as b WHERE a.b=b.b ORDER BY a.b } } {1 1 1 1 2 2 3 2 4 3 7 3 8 4 15 4 5 5 20 5} do_test select6-2.7 { execsql { SELECT a.b, a.[count(*)], [max(a)], [count(*)] FROM (SELECT count(*),b FROM t2 GROUP BY b) AS a, (SELECT max(a),b FROM t2 GROUP BY b) as b WHERE a.b=b.b ORDER BY a.b } } {1 1 1 1 2 2 3 2 3 4 7 4 4 8 15 8 5 5 20 5} do_test select6-2.8 { execsql { SELECT q, p, r FROM (SELECT count(*) as p , b as q FROM t2 GROUP BY b) AS a, (SELECT max(a) as r, b as s FROM t2 GROUP BY b) as b WHERE q=s ORDER BY s } } {1 1 1 2 2 3 3 4 7 4 8 15 5 5 20} do_test select6-2.9 { execsql { SELECT a.q, a.p, b.r FROM (SELECT count(*) as p , b as q FROM t2 GROUP BY q) AS a, (SELECT max(a) as r, b as s FROM t2 GROUP BY s) as b WHERE a.q=b.s ORDER BY a.q } } {1 1 1 2 2 3 3 4 7 4 8 15 5 5 20} do_test sqlite6-3.1 { execsql2 { SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE x=3)); } } {x 3 y 2} do_test sqlite6-3.2 { execsql { SELECT * FROM (SELECT a.q, a.p, b.r FROM (SELECT count(*) as p , b as q FROM t2 GROUP BY q) AS a, (SELECT max(a) as r, b as s FROM t2 GROUP BY s) as b WHERE a.q=b.s ORDER BY a.q) ORDER BY q } } {1 1 1 2 2 3 3 4 7 4 8 15 5 5 20} do_test select6-3.3 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', avg(y) as 'b' FROM t1) } } {10.5 3.7 14.2} do_test select6-3.4 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', avg(y) as 'b' FROM t1 WHERE y=4) } } {11.5 4 15.5} do_test select6-3.5 { execsql { SELECT x,y,x+y FROM (SELECT avg(a) as 'x', avg(b) as 'y' FROM t2 WHERE a=4) } } {4 3 7} do_test select6-3.6 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', avg(y) as 'b' FROM t1) WHERE a>10 } } {10.5 3.7 14.2} do_test select6-3.7 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', avg(y) as 'b' FROM t1) WHERE a<10 } } {} do_test select6-3.8 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', avg(y) as 'b' FROM t1 WHERE y=4) WHERE a>10 } } {11.5 4 15.5} do_test select6-3.9 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', avg(y) as 'b' FROM t1 WHERE y=4) WHERE a<10 } } {} do_test select6-3.10 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', y as 'b' FROM t1 GROUP BY b) ORDER BY a } } {1 1 2 2.5 2 4.5 5.5 3 8.5 11.5 4 15.5 18 5 23} do_test select6-3.11 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', y as 'b' FROM t1 GROUP BY b) WHERE b<4 ORDER BY a } } {1 1 2 2.5 2 4.5 5.5 3 8.5} do_test select6-3.12 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', y as 'b' FROM t1 GROUP BY b HAVING a>1) WHERE b<4 ORDER BY a } } {2.5 2 4.5 5.5 3 8.5} do_test select6-3.13 { execsql { SELECT a,b,a+b FROM (SELECT avg(x) as 'a', y as 'b' FROM t1 GROUP BY b HAVING a>1) ORDER BY a } } {2.5 2 4.5 5.5 3 8.5 11.5 4 15.5 18 5 23} do_test select6-3.14 { execsql { SELECT [count(*)],y FROM (SELECT count(*), y FROM t1 GROUP BY y) ORDER BY [count(*)] } } {1 1 2 2 4 3 5 5 8 4} do_test select6-3.15 { execsql { SELECT [count(*)],y FROM (SELECT count(*), y FROM t1 GROUP BY y) ORDER BY y } } {1 1 2 2 4 3 8 4 5 5} do_test select6-4.1 { execsql { SELECT a,b,c FROM (SELECT x AS 'a', y AS 'b', x+y AS 'c' FROM t1 WHERE y=4) WHERE a<10 ORDER BY a; } } {8 4 12 9 4 13} do_test select6-4.2 { execsql { SELECT y FROM (SELECT DISTINCT y FROM t1) WHERE y<5 ORDER BY y } } {1 2 3 4} do_test select6-4.3 { execsql { SELECT DISTINCT y FROM (SELECT y FROM t1) WHERE y<5 ORDER BY y } } {1 2 3 4} do_test select6-4.4 { execsql { SELECT avg(y) FROM (SELECT DISTINCT y FROM t1) WHERE y<5 ORDER BY y } } {2.5} do_test select6-4.5 { execsql { SELECT avg(y) FROM (SELECT DISTINCT y FROM t1 WHERE y<5) ORDER BY y } } {2.5} do_test select6-5.1 { execsql { SELECT a,x,b FROM (SELECT x+3 AS 'a', x FROM t1 WHERE y=3) AS 'p', (SELECT x AS 'b' FROM t1 WHERE y=4) AS 'q' WHERE a=b ORDER BY a } } {8 5 8 9 6 9 10 7 10} do_test select6-5.2 { execsql { SELECT a,x,b FROM (SELECT x+3 AS 'a', x FROM t1 WHERE y=3), (SELECT x AS 'b' FROM t1 WHERE y=4) WHERE a=b ORDER BY a } } {8 5 8 9 6 9 10 7 10} # Tests of compound sub-selects # do_test select5-6.1 { execsql { DELETE FROM t1 WHERE x>4; SELECT * FROM t1 } } {1 1 2 2 3 2 4 3} do_test select6-6.2 { execsql { SELECT * FROM ( SELECT x AS 'a' FROM t1 UNION ALL SELECT x+10 AS 'a' FROM t1 ) ORDER BY a; } } {1 2 3 4 11 12 13 14} do_test select6-6.3 { execsql { SELECT * FROM ( SELECT x AS 'a' FROM t1 UNION ALL SELECT x+1 AS 'a' FROM t1 ) ORDER BY a; } } {1 2 2 3 3 4 4 5} do_test select6-6.4 { execsql { SELECT * FROM ( SELECT x AS 'a' FROM t1 UNION SELECT x+1 AS 'a' FROM t1 ) ORDER BY a; } } {1 2 3 4 5} do_test select6-6.5 { execsql { SELECT * FROM ( SELECT x AS 'a' FROM t1 INTERSECT SELECT x+1 AS 'a' FROM t1 ) ORDER BY a; } } {2 3 4} do_test select6-6.6 { execsql { SELECT * FROM ( SELECT x AS 'a' FROM t1 EXCEPT SELECT x*2 AS 'a' FROM t1 ) ORDER BY a; } } {1 3} # Subselects with no FROM clause # do_test select6-7.1 { execsql { SELECT * FROM (SELECT 1) } } {1} do_test select6-7.2 { execsql { SELECT c,b,a,* FROM (SELECT 1 AS 'a', 2 AS 'b', 'abc' AS 'c') } } {abc 2 1 1 2 abc} do_test select6-7.3 { execsql { SELECT c,b,a,* FROM (SELECT 1 AS 'a', 2 AS 'b', 'abc' AS 'c' WHERE 0) } } {} do_test select6-7.4 { execsql2 { SELECT c,b,a,* FROM (SELECT 1 AS 'a', 2 AS 'b', 'abc' AS 'c' WHERE 1) } } {c abc b 2 a 1 a 1 b 2 c abc} # The following procedure compiles the SQL given as an argument and returns # TRUE if that SQL uses any transient tables and returns FALSE if no # transient tables are used. This is used to make sure that the # sqliteFlattenSubquery() routine in select.c is doing its job. # proc is_flat {sql} { return [expr 0>[lsearch [execsql "EXPLAIN $sql"] OpenTemp]] } # Check that the flattener works correctly for deeply nested subqueries # involving joins. # do_test select6-8.1 { execsql { BEGIN; CREATE TABLE t3(p,q); INSERT INTO t3 VALUES(1,11); INSERT INTO t3 VALUES(2,22); CREATE TABLE t4(q,r); INSERT INTO t4 VALUES(11,111); INSERT INTO t4 VALUES(22,222); COMMIT; SELECT * FROM t3 NATURAL JOIN t4; } } {1 11 111 2 22 222} do_test select6-8.2 { execsql { SELECT y, p, q, r FROM (SELECT t1.y AS y, t2.b AS b FROM t1, t2 WHERE t1.x=t2.a) AS m, (SELECT t3.p AS p, t3.q AS q, t4.r AS r FROM t3 NATURAL JOIN t4) as n WHERE y=p } } {1 1 11 111 2 2 22 222 2 2 22 222} do_test select6-8.3 { is_flat { SELECT y, p, q, r FROM (SELECT t1.y AS y, t2.b AS b FROM t1, t2 WHERE t1.x=t2.a) AS m, (SELECT t3.p AS p, t3.q AS q, t4.r AS r FROM t3 NATURAL JOIN t4) as n WHERE y=p } } {1} do_test select6-8.4 { execsql { SELECT DISTINCT y, p, q, r FROM (SELECT t1.y AS y, t2.b AS b FROM t1, t2 WHERE t1.x=t2.a) AS m, (SELECT t3.p AS p, t3.q AS q, t4.r AS r FROM t3 NATURAL JOIN t4) as n WHERE y=p } } {1 1 11 111 2 2 22 222} do_test select6-8.5 { execsql { SELECT * FROM (SELECT y, p, q, r FROM (SELECT t1.y AS y, t2.b AS b FROM t1, t2 WHERE t1.x=t2.a) AS m, (SELECT t3.p AS p, t3.q AS q, t4.r AS r FROM t3 NATURAL JOIN t4) as n WHERE y=p) AS e, (SELECT r AS z FROM t4 WHERE q=11) AS f WHERE e.r=f.z } } {1 1 11 111 111} do_test select6-8.6 { is_flat { SELECT * FROM (SELECT y, p, q, r FROM (SELECT t1.y AS y, t2.b AS b FROM t1, t2 WHERE t1.x=t2.a) AS m, (SELECT t3.p AS p, t3.q AS q, t4.r AS r FROM t3 NATURAL JOIN t4) as n WHERE y=p) AS e, (SELECT r AS z FROM t4 WHERE q=11) AS f WHERE e.r=f.z } } {1} finish_test