--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/TclScript/where3.test Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,216 @@
+# 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 1.4 2008/04/17 19:14:02 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 {} {}}
+
+ifcapable explain {
+ do_test where3-1.1.1 {
+ explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x
+ WHERE p=2 AND a=q}
+ } [explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON x=q
+ WHERE p=2 AND a=q}]
+}
+
+# Ticket #1830
+#
+# This is similar to the above but with the LEFT JOIN on the
+# other side.
+#
+do_test where3-1.2 {
+ execsql {
+ CREATE TABLE parent1(parent1key, child1key, Child2key, child3key);
+ CREATE TABLE child1 ( child1key NVARCHAR, value NVARCHAR );
+ CREATE UNIQUE INDEX PKIDXChild1 ON child1 ( child1key );
+ CREATE TABLE child2 ( child2key NVARCHAR, value NVARCHAR );
+
+ INSERT INTO parent1(parent1key,child1key,child2key)
+ VALUES ( 1, 'C1.1', 'C2.1' );
+ INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.1', 'Value for C1.1' );
+ INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.1', 'Value for C2.1' );
+
+ INSERT INTO parent1 ( parent1key, child1key, child2key )
+ VALUES ( 2, 'C1.2', 'C2.2' );
+ INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.2', 'Value for C2.2' );
+
+ INSERT INTO parent1 ( parent1key, child1key, child2key )
+ VALUES ( 3, 'C1.3', 'C2.3' );
+ INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.3', 'Value for C1.3' );
+ INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.3', 'Value for C2.3' );
+
+ SELECT parent1.parent1key, child1.value, child2.value
+ FROM parent1
+ LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key
+ INNER JOIN child2 ON child2.child2key = parent1.child2key;
+ }
+} {1 {Value for C1.1} {Value for C2.1} 2 {} {Value for C2.2} 3 {Value for C1.3} {Value for C2.3}}
+
+ifcapable explain {
+ do_test where3-1.2.1 {
+ explain_no_trace {
+ SELECT parent1.parent1key, child1.value, child2.value
+ FROM parent1
+ LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key
+ INNER JOIN child2 ON child2.child2key = parent1.child2key;
+ }
+ } [explain_no_trace {
+ SELECT parent1.parent1key, child1.value, child2.value
+ FROM parent1
+ LEFT OUTER JOIN child1 ON parent1.child1key = child1.child1key
+ INNER JOIN child2 ON child2.child2key = parent1.child2key;
+ }]
+}
+
+# This procedure executes the SQL. Then it appends
+# the ::sqlite_query_plan variable.
+#
+proc queryplan {sql} {
+ set ::sqlite_sort_count 0
+ set data [execsql $sql]
+ return [concat $data $::sqlite_query_plan]
+}
+
+
+# If you have a from clause of the form: A B C left join D
+# then make sure the query optimizer is able to reorder the
+# A B C part anyway it wants.
+#
+# Following the fix to ticket #1652, there was a time when
+# the C table would not reorder. So the following reorderings
+# were possible:
+#
+# A B C left join D
+# B A C left join D
+#
+# But these reorders were not allowed
+#
+# C A B left join D
+# A C B left join D
+# C B A left join D
+# B C A left join D
+#
+# The following tests are here to verify that the latter four
+# reorderings are allowed again.
+#
+do_test where3-2.1 {
+ execsql {
+ CREATE TABLE tA(apk integer primary key, ax);
+ CREATE TABLE tB(bpk integer primary key, bx);
+ CREATE TABLE tC(cpk integer primary key, cx);
+ CREATE TABLE tD(dpk integer primary key, dx);
+ }
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE cpk=bx AND bpk=ax
+ }
+} {tA {} tB * tC * tD *}
+do_test where3-2.1.1 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk
+ WHERE cpk=bx AND bpk=ax
+ }
+} {tA {} tB * tC * tD *}
+do_test where3-2.1.2 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk
+ WHERE bx=cpk AND bpk=ax
+ }
+} {tA {} tB * tC * tD *}
+do_test where3-2.1.3 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk
+ WHERE bx=cpk AND ax=bpk
+ }
+} {tA {} tB * tC * tD *}
+do_test where3-2.1.4 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE bx=cpk AND ax=bpk
+ }
+} {tA {} tB * tC * tD *}
+do_test where3-2.1.5 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE cpk=bx AND ax=bpk
+ }
+} {tA {} tB * tC * tD *}
+do_test where3-2.2 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE cpk=bx AND apk=bx
+ }
+} {tB {} tA * tC * tD *}
+do_test where3-2.3 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE cpk=bx AND apk=bx
+ }
+} {tB {} tA * tC * tD *}
+do_test where3-2.4 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE apk=cx AND bpk=ax
+ }
+} {tC {} tA * tB * tD *}
+do_test where3-2.5 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE cpk=ax AND bpk=cx
+ }
+} {tA {} tC * tB * tD *}
+do_test where3-2.5 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE bpk=cx AND apk=bx
+ }
+} {tC {} tB * tA * tD *}
+do_test where3-2.6 {
+ queryplan {
+ SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx
+ WHERE cpk=bx AND apk=cx
+ }
+} {tB {} tC * tA * tD *}
+
+
+finish_test