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-# 2005 January 19
-#
-# 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 script is testing correlated subqueries
-#
-# $Id: subquery.test,v 1.17 2009/01/09 01:12:28 drh Exp $
-#
-
-set testdir [file dirname $argv0]
-source $testdir/tester.tcl
-
-ifcapable !subquery {
- finish_test
- return
-}
-
-do_test subquery-1.1 {
- execsql {
- BEGIN;
- CREATE TABLE t1(a,b);
- INSERT INTO t1 VALUES(1,2);
- INSERT INTO t1 VALUES(3,4);
- INSERT INTO t1 VALUES(5,6);
- INSERT INTO t1 VALUES(7,8);
- CREATE TABLE t2(x,y);
- INSERT INTO t2 VALUES(1,1);
- INSERT INTO t2 VALUES(3,9);
- INSERT INTO t2 VALUES(5,25);
- INSERT INTO t2 VALUES(7,49);
- COMMIT;
- }
- execsql {
- SELECT a, (SELECT y FROM t2 WHERE x=a) FROM t1 WHERE b<8
- }
-} {1 1 3 9 5 25}
-do_test subquery-1.2 {
- execsql {
- UPDATE t1 SET b=b+(SELECT y FROM t2 WHERE x=a);
- SELECT * FROM t1;
- }
-} {1 3 3 13 5 31 7 57}
-
-do_test subquery-1.3 {
- execsql {
- SELECT b FROM t1 WHERE EXISTS(SELECT * FROM t2 WHERE y=a)
- }
-} {3}
-do_test subquery-1.4 {
- execsql {
- SELECT b FROM t1 WHERE NOT EXISTS(SELECT * FROM t2 WHERE y=a)
- }
-} {13 31 57}
-
-# Simple tests to make sure correlated subqueries in WHERE clauses
-# are used by the query optimizer correctly.
-do_test subquery-1.5 {
- execsql {
- SELECT a, x FROM t1, t2 WHERE t1.a = (SELECT x);
- }
-} {1 1 3 3 5 5 7 7}
-do_test subquery-1.6 {
- execsql {
- CREATE INDEX i1 ON t1(a);
- SELECT a, x FROM t1, t2 WHERE t1.a = (SELECT x);
- }
-} {1 1 3 3 5 5 7 7}
-do_test subquery-1.7 {
- execsql {
- SELECT a, x FROM t2, t1 WHERE t1.a = (SELECT x);
- }
-} {1 1 3 3 5 5 7 7}
-
-# Try an aggregate in both the subquery and the parent query.
-do_test subquery-1.8 {
- execsql {
- SELECT count(*) FROM t1 WHERE a > (SELECT count(*) FROM t2);
- }
-} {2}
-
-# Test a correlated subquery disables the "only open the index" optimization.
-do_test subquery-1.9.1 {
- execsql {
- SELECT (y*2)>b FROM t1, t2 WHERE a=x;
- }
-} {0 1 1 1}
-do_test subquery-1.9.2 {
- execsql {
- SELECT a FROM t1 WHERE (SELECT (y*2)>b FROM t2 WHERE a=x);
- }
-} {3 5 7}
-
-# Test that the flattening optimization works with subquery expressions.
-do_test subquery-1.10.1 {
- execsql {
- SELECT (SELECT a), b FROM t1;
- }
-} {1 3 3 13 5 31 7 57}
-do_test subquery-1.10.2 {
- execsql {
- SELECT * FROM (SELECT (SELECT a), b FROM t1);
- }
-} {1 3 3 13 5 31 7 57}
-do_test subquery-1.10.3 {
- execsql {
- SELECT * FROM (SELECT (SELECT sum(a) FROM t1));
- }
-} {16}
-do_test subquery-1.10.4 {
- execsql {
- CREATE TABLE t5 (val int, period text PRIMARY KEY);
- INSERT INTO t5 VALUES(5, '2001-3');
- INSERT INTO t5 VALUES(10, '2001-4');
- INSERT INTO t5 VALUES(15, '2002-1');
- INSERT INTO t5 VALUES(5, '2002-2');
- INSERT INTO t5 VALUES(10, '2002-3');
- INSERT INTO t5 VALUES(15, '2002-4');
- INSERT INTO t5 VALUES(10, '2003-1');
- INSERT INTO t5 VALUES(5, '2003-2');
- INSERT INTO t5 VALUES(25, '2003-3');
- INSERT INTO t5 VALUES(5, '2003-4');
-
- SELECT period, vsum
- FROM (SELECT
- a.period,
- (select sum(val) from t5 where period between a.period and '2002-4') vsum
- FROM t5 a where a.period between '2002-1' and '2002-4')
- WHERE vsum < 45 ;
- }
-} {2002-2 30 2002-3 25 2002-4 15}
-do_test subquery-1.10.5 {
- execsql {
- SELECT period, vsum from
- (select a.period,
- (select sum(val) from t5 where period between a.period and '2002-4') vsum
- FROM t5 a where a.period between '2002-1' and '2002-4')
- WHERE vsum < 45 ;
- }
-} {2002-2 30 2002-3 25 2002-4 15}
-do_test subquery-1.10.6 {
- execsql {
- DROP TABLE t5;
- }
-} {}
-
-
-
-#------------------------------------------------------------------
-# The following test cases - subquery-2.* - are not logically
-# organized. They're here largely because they were failing during
-# one stage of development of sub-queries.
-#
-do_test subquery-2.1 {
- execsql {
- SELECT (SELECT 10);
- }
-} {10}
-do_test subquery-2.2.1 {
- execsql {
- CREATE TABLE t3(a PRIMARY KEY, b);
- INSERT INTO t3 VALUES(1, 2);
- INSERT INTO t3 VALUES(3, 1);
- }
-} {}
-do_test subquery-2.2.2 {
- execsql {
- SELECT * FROM t3 WHERE a IN (SELECT b FROM t3);
- }
-} {1 2}
-do_test subquery-2.2.3 {
- execsql {
- DROP TABLE t3;
- }
-} {}
-do_test subquery-2.3.1 {
- execsql {
- CREATE TABLE t3(a TEXT);
- INSERT INTO t3 VALUES('10');
- }
-} {}
-do_test subquery-2.3.2 {
- execsql {
- SELECT a IN (10.0, 20) FROM t3;
- }
-} {0}
-do_test subquery-2.3.3 {
- execsql {
- DROP TABLE t3;
- }
-} {}
-do_test subquery-2.4.1 {
- execsql {
- CREATE TABLE t3(a TEXT);
- INSERT INTO t3 VALUES('XX');
- }
-} {}
-do_test subquery-2.4.2 {
- execsql {
- SELECT count(*) FROM t3 WHERE a IN (SELECT 'XX')
- }
-} {1}
-do_test subquery-2.4.3 {
- execsql {
- DROP TABLE t3;
- }
-} {}
-do_test subquery-2.5.1 {
- execsql {
- CREATE TABLE t3(a INTEGER);
- INSERT INTO t3 VALUES(10);
-
- CREATE TABLE t4(x TEXT);
- INSERT INTO t4 VALUES('10.0');
- }
-} {}
-do_test subquery-2.5.2 {
- # In the expr "x IN (SELECT a FROM t3)" the RHS of the IN operator
- # has text affinity and the LHS has integer affinity. The rule is
- # that we try to convert both sides to an integer before doing the
- # comparision. Hence, the integer value 10 in t3 will compare equal
- # to the string value '10.0' in t4 because the t4 value will be
- # converted into an integer.
- execsql {
- SELECT * FROM t4 WHERE x IN (SELECT a FROM t3);
- }
-} {10.0}
-do_test subquery-2.5.3.1 {
- # The t4i index cannot be used to resolve the "x IN (...)" constraint
- # because the constraint has integer affinity but t4i has text affinity.
- execsql {
- CREATE INDEX t4i ON t4(x);
- SELECT * FROM t4 WHERE x IN (SELECT a FROM t3);
- }
-} {10.0}
-do_test subquery-2.5.3.2 {
- # Verify that the t4i index was not used in the previous query
- execsql {
- EXPLAIN QUERY PLAN
- SELECT * FROM t4 WHERE x IN (SELECT a FROM t3);
- }
-} {~/t4i/}
-do_test subquery-2.5.4 {
- execsql {
- DROP TABLE t3;
- DROP TABLE t4;
- }
-} {}
-
-#------------------------------------------------------------------
-# The following test cases - subquery-3.* - test tickets that
-# were raised during development of correlated subqueries.
-#
-
-# Ticket 1083
-ifcapable view {
- do_test subquery-3.1 {
- catchsql { DROP TABLE t1; }
- catchsql { DROP TABLE t2; }
- execsql {
- CREATE TABLE t1(a,b);
- INSERT INTO t1 VALUES(1,2);
- CREATE VIEW v1 AS SELECT b FROM t1 WHERE a>0;
- CREATE TABLE t2(p,q);
- INSERT INTO t2 VALUES(2,9);
- SELECT * FROM v1 WHERE EXISTS(SELECT * FROM t2 WHERE p=v1.b);
- }
- } {2}
- do_test subquery-3.1.1 {
- execsql {
- SELECT * FROM v1 WHERE EXISTS(SELECT 1);
- }
- } {2}
-} else {
- catchsql { DROP TABLE t1; }
- catchsql { DROP TABLE t2; }
- execsql {
- CREATE TABLE t1(a,b);
- INSERT INTO t1 VALUES(1,2);
- CREATE TABLE t2(p,q);
- INSERT INTO t2 VALUES(2,9);
- }
-}
-
-# Ticket 1084
-do_test subquery-3.2 {
- catchsql {
- CREATE TABLE t1(a,b);
- INSERT INTO t1 VALUES(1,2);
- }
- execsql {
- SELECT (SELECT t1.a) FROM t1;
- }
-} {1}
-
-# Test Cases subquery-3.3.* test correlated subqueries where the
-# parent query is an aggregate query. Ticket #1105 is an example
-# of such a query.
-#
-do_test subquery-3.3.1 {
- execsql {
- SELECT a, (SELECT b) FROM t1 GROUP BY a;
- }
-} {1 2}
-do_test subquery-3.3.2 {
- catchsql {DROP TABLE t2}
- execsql {
- CREATE TABLE t2(c, d);
- INSERT INTO t2 VALUES(1, 'one');
- INSERT INTO t2 VALUES(2, 'two');
- SELECT a, (SELECT d FROM t2 WHERE a=c) FROM t1 GROUP BY a;
- }
-} {1 one}
-do_test subquery-3.3.3 {
- execsql {
- INSERT INTO t1 VALUES(2, 4);
- SELECT max(a), (SELECT d FROM t2 WHERE a=c) FROM t1;
- }
-} {2 two}
-do_test subquery-3.3.4 {
- execsql {
- SELECT a, (SELECT (SELECT d FROM t2 WHERE a=c)) FROM t1 GROUP BY a;
- }
-} {1 one 2 two}
-do_test subquery-3.3.5 {
- execsql {
- SELECT a, (SELECT count(*) FROM t2 WHERE a=c) FROM t1;
- }
-} {1 1 2 1}
-
-# The following tests check for aggregate subqueries in an aggregate
-# query.
-#
-do_test subquery-3.4.1 {
- execsql {
- CREATE TABLE t34(x,y);
- INSERT INTO t34 VALUES(106,4), (107,3), (106,5), (107,5);
- SELECT a.x, avg(a.y)
- FROM t34 AS a
- GROUP BY a.x
- HAVING NOT EXISTS( SELECT b.x, avg(b.y)
- FROM t34 AS b
- GROUP BY b.x
- HAVING avg(a.y) > avg(b.y));
- }
-} {107 4.0}
-do_test subquery-3.4.2 {
- execsql {
- SELECT a.x, avg(a.y) AS avg1
- FROM t34 AS a
- GROUP BY a.x
- HAVING NOT EXISTS( SELECT b.x, avg(b.y) AS avg2
- FROM t34 AS b
- GROUP BY b.x
- HAVING avg1 > avg2);
- }
-} {107 4.0}
-do_test subquery-3.4.3 {
- execsql {
- SELECT
- a.x,
- avg(a.y),
- NOT EXISTS ( SELECT b.x, avg(b.y)
- FROM t34 AS b
- GROUP BY b.x
- HAVING avg(a.y) > avg(b.y)),
- EXISTS ( SELECT c.x, avg(c.y)
- FROM t34 AS c
- GROUP BY c.x
- HAVING avg(a.y) > avg(c.y))
- FROM t34 AS a
- GROUP BY a.x
- ORDER BY a.x;
- }
-} {106 4.5 0 1 107 4.0 1 0}
-
-do_test subquery-3.5.1 {
- execsql {
- CREATE TABLE t35a(x); INSERT INTO t35a VALUES(1),(2),(3);
- CREATE TABLE t35b(y); INSERT INTO t35b VALUES(98), (99);
- SELECT max((SELECT avg(y) FROM t35b)) FROM t35a;
- }
-} {98.5}
-do_test subquery-3.5.2 {
- execsql {
- SELECT max((SELECT count(y) FROM t35b)) FROM t35a;
- }
-} {2}
-do_test subquery-3.5.3 {
- execsql {
- SELECT max((SELECT count() FROM t35b)) FROM t35a;
- }
-} {2}
-do_test subquery-3.5.4 {
- catchsql {
- SELECT max((SELECT count(x) FROM t35b)) FROM t35a;
- }
-} {1 {misuse of aggregate: count()}}
-do_test subquery-3.5.5 {
- catchsql {
- SELECT max((SELECT count(x) FROM t35b)) FROM t35a;
- }
-} {1 {misuse of aggregate: count()}}
-do_test subquery-3.5.6 {
- catchsql {
- SELECT max((SELECT a FROM (SELECT count(x) AS a FROM t35b))) FROM t35a;
- }
-} {1 {misuse of aggregate: count()}}
-do_test subquery-3.5.7 {
- execsql {
- SELECT max((SELECT a FROM (SELECT count(y) AS a FROM t35b))) FROM t35a;
- }
-} {2}
-
-
-#------------------------------------------------------------------
-# These tests - subquery-4.* - use the TCL statement cache to try
-# and expose bugs to do with re-using statements that have been
-# passed to sqlite3_reset().
-#
-# One problem was that VDBE memory cells were not being initialized
-# to NULL on the second and subsequent executions.
-#
-do_test subquery-4.1.1 {
- execsql {
- SELECT (SELECT a FROM t1);
- }
-} {1}
-do_test subquery-4.2 {
- execsql {
- DELETE FROM t1;
- SELECT (SELECT a FROM t1);
- }
-} {{}}
-do_test subquery-4.2.1 {
- execsql {
- CREATE TABLE t3(a PRIMARY KEY);
- INSERT INTO t3 VALUES(10);
- }
- execsql {INSERT INTO t3 VALUES((SELECT max(a) FROM t3)+1)}
-} {}
-do_test subquery-4.2.2 {
- execsql {INSERT INTO t3 VALUES((SELECT max(a) FROM t3)+1)}
-} {}
-
-#------------------------------------------------------------------
-# The subquery-5.* tests make sure string literals in double-quotes
-# are handled efficiently. Double-quote literals are first checked
-# to see if they match any column names. If there is not column name
-# match then those literals are used a string constants. When a
-# double-quoted string appears, we want to make sure that the search
-# for a matching column name did not cause an otherwise static subquery
-# to become a dynamic (correlated) subquery.
-#
-do_test subquery-5.1 {
- proc callcntproc {n} {
- incr ::callcnt
- return $n
- }
- set callcnt 0
- db function callcnt callcntproc
- execsql {
- CREATE TABLE t4(x,y);
- INSERT INTO t4 VALUES('one',1);
- INSERT INTO t4 VALUES('two',2);
- INSERT INTO t4 VALUES('three',3);
- INSERT INTO t4 VALUES('four',4);
- CREATE TABLE t5(a,b);
- INSERT INTO t5 VALUES(1,11);
- INSERT INTO t5 VALUES(2,22);
- INSERT INTO t5 VALUES(3,33);
- INSERT INTO t5 VALUES(4,44);
- SELECT b FROM t5 WHERE a IN
- (SELECT callcnt(y)+0 FROM t4 WHERE x="two")
- }
-} {22}
-do_test subquery-5.2 {
- # This is the key test. The subquery should have only run once. If
- # The double-quoted identifier "two" were causing the subquery to be
- # processed as a correlated subquery, then it would have run 4 times.
- set callcnt
-} {1}
-
-
-# Ticket #1380. Make sure correlated subqueries on an IN clause work
-# correctly when the left-hand side of the IN operator is constant.
-#
-do_test subquery-6.1 {
- set callcnt 0
- execsql {
- SELECT x FROM t4 WHERE 1 IN (SELECT callcnt(count(*)) FROM t5 WHERE a=y)
- }
-} {one two three four}
-do_test subquery-6.2 {
- set callcnt
-} {4}
-do_test subquery-6.3 {
- set callcnt 0
- execsql {
- SELECT x FROM t4 WHERE 1 IN (SELECT callcnt(count(*)) FROM t5 WHERE a=1)
- }
-} {one two three four}
-do_test subquery-6.4 {
- set callcnt
-} {1}
-
-if 0 { ############# disable until we get #2652 fixed
-# Ticket #2652. Allow aggregate functions of outer queries inside
-# a non-aggregate subquery.
-#
-do_test subquery-7.1 {
- execsql {
- CREATE TABLE t7(c7);
- INSERT INTO t7 VALUES(1);
- INSERT INTO t7 VALUES(2);
- INSERT INTO t7 VALUES(3);
- CREATE TABLE t8(c8);
- INSERT INTO t8 VALUES(100);
- INSERT INTO t8 VALUES(200);
- INSERT INTO t8 VALUES(300);
- CREATE TABLE t9(c9);
- INSERT INTO t9 VALUES(10000);
- INSERT INTO t9 VALUES(20000);
- INSERT INTO t9 VALUES(30000);
-
- SELECT (SELECT c7+c8 FROM t7) FROM t8;
- }
-} {101 201 301}
-do_test subquery-7.2 {
- execsql {
- SELECT (SELECT max(c7)+c8 FROM t7) FROM t8;
- }
-} {103 203 303}
-do_test subquery-7.3 {
- execsql {
- SELECT (SELECT c7+max(c8) FROM t8) FROM t7
- }
-} {301}
-do_test subquery-7.4 {
- execsql {
- SELECT (SELECT max(c7)+max(c8) FROM t8) FROM t7
- }
-} {303}
-do_test subquery-7.5 {
- execsql {
- SELECT (SELECT c8 FROM t8 WHERE rowid=max(c7)) FROM t7
- }
-} {300}
-do_test subquery-7.6 {
- execsql {
- SELECT (SELECT (SELECT max(c7+c8+c9) FROM t9) FROM t8) FROM t7
- }
-} {30101 30102 30103}
-do_test subquery-7.7 {
- execsql {
- SELECT (SELECT (SELECT c7+max(c8+c9) FROM t9) FROM t8) FROM t7
- }
-} {30101 30102 30103}
-do_test subquery-7.8 {
- execsql {
- SELECT (SELECT (SELECT max(c7)+c8+c9 FROM t9) FROM t8) FROM t7
- }
-} {10103}
-do_test subquery-7.9 {
- execsql {
- SELECT (SELECT (SELECT c7+max(c8)+c9 FROM t9) FROM t8) FROM t7
- }
-} {10301 10302 10303}
-do_test subquery-7.10 {
- execsql {
- SELECT (SELECT (SELECT c7+c8+max(c9) FROM t9) FROM t8) FROM t7
- }
-} {30101 30102 30103}
-do_test subquery-7.11 {
- execsql {
- SELECT (SELECT (SELECT max(c7)+max(c8)+max(c9) FROM t9) FROM t8) FROM t7
- }
-} {30303}
-} ;############# Disabled
-
-finish_test
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-31 10:15:01 +0000