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b3549d43e2de0c9eb08e3516ae58cc01b200a96a
sqlite/test/select6.test
drh e9ffc168d8 Additional tests of the new flattener added. Ticket #272. (CVS 949) 
FossilOrigin-Name: 8d9ee45ab487614191e8d6aef845141fdddf832a
2003-05-02 16:44:25 +00:00

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# 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 1.10 2003/05/02 16:44:25 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 [a.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
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