# 2006 January 31
#
# 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 the join reordering optimization
# in cases that include a LEFT JOIN.
#
# $Id: where3.test,v 1.1 2006/02/01 02:45:02 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# The following is from ticket #1652.
#
# A comma join then a left outer join: A,B left join C.
# Arrange indices so that the B table is chosen to go first.
# Also put an index on C, but make sure that A is chosen before C.
#
do_test where3-1.1 {
execsql {
CREATE TABLE t1(a, b);
CREATE TABLE t2(p, q);
CREATE TABLE t3(x, y);
INSERT INTO t1 VALUES(111,'one');
INSERT INTO t1 VALUES(222,'two');
INSERT INTO t1 VALUES(333,'three');
INSERT INTO t2 VALUES(1,111);
INSERT INTO t2 VALUES(2,222);
INSERT INTO t2 VALUES(4,444);
CREATE INDEX t2i1 ON t2(p);
INSERT INTO t3 VALUES(999,'nine');
CREATE INDEX t3i1 ON t3(x);
SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x WHERE p=2 AND a=q;
}
} {222 two 2 222 {} {}}
finish_test