120 lines
3.5 KiB
Plaintext
120 lines
3.5 KiB
Plaintext
# 2007 Sep 12
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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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#
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# This file is to test that ticket #2640 has been fixed.
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#
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# $Id: tkt2640.test,v 1.1 2007/09/12 15:41:01 drh Exp $
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#
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# The problem in ticket #2640 was that the query optimizer was
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# not recognizing all uses of tables within subqueries in the
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# WHERE clause. If the subquery contained a compound SELECT,
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# then tables that were used by terms of the compound other than
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# the last term would not be recognized as dependencies.
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# So if one of the SELECT statements within a compound made
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# use of a table that occurs later in a join, the query
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# optimizer would not recognize this and would try to evaluate
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# the subquery too early, before that tables value had been
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# established.
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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do_test tkt2640-1.1 {
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execsql {
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CREATE TABLE persons(person_id, name);
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INSERT INTO persons VALUES(1,'fred');
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INSERT INTO persons VALUES(2,'barney');
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INSERT INTO persons VALUES(3,'wilma');
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INSERT INTO persons VALUES(4,'pebbles');
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INSERT INTO persons VALUES(5,'bambam');
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CREATE TABLE directors(person_id);
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INSERT INTO directors VALUES(5);
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INSERT INTO directors VALUES(3);
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CREATE TABLE writers(person_id);
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INSERT INTO writers VALUES(2);
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INSERT INTO writers VALUES(3);
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INSERT INTO writers VALUES(4);
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SELECT DISTINCT p.name
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FROM persons p, directors d
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WHERE d.person_id=p.person_id
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AND NOT EXISTS (
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SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id
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EXCEPT
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SELECT person_id FROM writers w
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);
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}
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} {wilma}
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do_test tkt2640-1.2 {
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execsql {
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SELECT DISTINCT p.name
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FROM persons p CROSS JOIN directors d
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WHERE d.person_id=p.person_id
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AND NOT EXISTS (
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SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id
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EXCEPT
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SELECT person_id FROM writers w
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);
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}
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} {wilma}
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do_test tkt2640-1.3 {
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execsql {
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SELECT DISTINCT p.name
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FROM directors d CROSS JOIN persons p
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WHERE d.person_id=p.person_id
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AND NOT EXISTS (
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SELECT person_id FROM directors d1 WHERE d1.person_id=p.person_id
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EXCEPT
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SELECT person_id FROM writers w
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);
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}
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} {wilma}
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do_test tkt2640-1.4 {
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execsql {
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SELECT DISTINCT p.name
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FROM persons p, directors d
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WHERE d.person_id=p.person_id
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AND NOT EXISTS (
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SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id
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EXCEPT
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SELECT person_id FROM writers w
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);
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}
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} {wilma}
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do_test tkt2640-1.5 {
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execsql {
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SELECT DISTINCT p.name
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FROM persons p CROSS JOIN directors d
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WHERE d.person_id=p.person_id
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AND NOT EXISTS (
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SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id
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EXCEPT
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SELECT person_id FROM writers w
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);
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}
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} {wilma}
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do_test tkt2640-1.6 {
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execsql {
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SELECT DISTINCT p.name
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FROM directors d CROSS JOIN persons p
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WHERE d.person_id=p.person_id
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AND NOT EXISTS (
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SELECT person_id FROM directors d1 WHERE d1.person_id=d.person_id
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EXCEPT
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SELECT person_id FROM writers w
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);
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}
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} {wilma}
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finish_test
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