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