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+# 2013-09-05
+#
+# 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.
+#
+#***********************************************************************
+#
+# Test cases for query planning decisions and the likely(), unlikely(), and
+# likelihood() functions.
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix whereG
+
+do_execsql_test whereG-1.0 {
+ CREATE TABLE composer(
+ cid INTEGER PRIMARY KEY,
+ cname TEXT
+ );
+ CREATE TABLE album(
+ aid INTEGER PRIMARY KEY,
+ aname TEXT
+ );
+ CREATE TABLE track(
+ tid INTEGER PRIMARY KEY,
+ cid INTEGER REFERENCES composer,
+ aid INTEGER REFERENCES album,
+ title TEXT
+ );
+ CREATE INDEX track_i1 ON track(cid);
+ CREATE INDEX track_i2 ON track(aid);
+ INSERT INTO composer VALUES(1, 'W. A. Mozart');
+ INSERT INTO composer VALUES(2, 'Beethoven');
+ INSERT INTO composer VALUES(3, 'Thomas Tallis');
+ INSERT INTO composer VALUES(4, 'Joseph Hayden');
+ INSERT INTO composer VALUES(5, 'Thomas Weelkes');
+ INSERT INTO composer VALUES(6, 'J. S. Bach');
+ INSERT INTO composer VALUES(7, 'Orlando Gibbons');
+ INSERT INTO composer VALUES(8, 'Josquin des Prés');
+ INSERT INTO composer VALUES(9, 'Byrd');
+ INSERT INTO composer VALUES(10, 'Francis Poulenc');
+ INSERT INTO composer VALUES(11, 'Mendelsshon');
+ INSERT INTO composer VALUES(12, 'Zoltán Kodály');
+ INSERT INTO composer VALUES(13, 'Handel');
+ INSERT INTO album VALUES(100, 'Kodály: Missa Brevis');
+ INSERT INTO album VALUES(101, 'Messiah');
+ INSERT INTO album VALUES(102, 'Missa Brevis in D-, K.65');
+ INSERT INTO album VALUES(103, 'The complete English anthems');
+ INSERT INTO album VALUES(104, 'Mass in B Minor, BWV 232');
+ INSERT INTO track VALUES(10005, 12, 100, 'Sanctus');
+ INSERT INTO track VALUES(10007, 12, 100, 'Agnus Dei');
+ INSERT INTO track VALUES(10115, 13, 101, 'Surely He Hath Borne Our Griefs');
+ INSERT INTO track VALUES(10129, 13, 101, 'Since By Man Came Death');
+ INSERT INTO track VALUES(10206, 1, 102, 'Agnus Dei');
+ INSERT INTO track VALUES(10301, 3, 103, 'If Ye Love Me');
+ INSERT INTO track VALUES(10402, 6, 104, 'Domine Deus');
+ INSERT INTO track VALUES(10403, 6, 104, 'Qui tollis');
+} {}
+do_eqp_test whereG-1.1 {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE unlikely(cname LIKE '%bach%')
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+} {/.*composer.*track.*album.*/}
+do_execsql_test whereG-1.2 {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE unlikely(cname LIKE '%bach%')
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+} {{Mass in B Minor, BWV 232}}
+
+do_eqp_test whereG-1.3 {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE likelihood(cname LIKE '%bach%', 0.5)
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+} {/.*track.*composer.*album.*/}
+do_execsql_test whereG-1.4 {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE likelihood(cname LIKE '%bach%', 0.5)
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+} {{Mass in B Minor, BWV 232}}
+
+do_eqp_test whereG-1.5 {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE cname LIKE '%bach%'
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+} {/.*track.*(composer.*album|album.*composer).*/}
+do_execsql_test whereG-1.6 {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE cname LIKE '%bach%'
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+} {{Mass in B Minor, BWV 232}}
+
+do_eqp_test whereG-1.7 {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE cname LIKE '%bach%'
+ AND unlikely(composer.cid=track.cid)
+ AND unlikely(album.aid=track.aid);
+} {/.*track.*(composer.*album|album.*composer).*/}
+do_execsql_test whereG-1.8 {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE cname LIKE '%bach%'
+ AND unlikely(composer.cid=track.cid)
+ AND unlikely(album.aid=track.aid);
+} {{Mass in B Minor, BWV 232}}
+
+do_test whereG-2.1 {
+ catchsql {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE likelihood(cname LIKE '%bach%', -0.01)
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+ }
+} {1 {second argument to likelihood() must be a constant between 0.0 and 1.0}}
+do_test whereG-2.2 {
+ catchsql {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE likelihood(cname LIKE '%bach%', 1.01)
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+ }
+} {1 {second argument to likelihood() must be a constant between 0.0 and 1.0}}
+do_test whereG-2.3 {
+ catchsql {
+ SELECT DISTINCT aname
+ FROM album, composer, track
+ WHERE likelihood(cname LIKE '%bach%', track.cid)
+ AND composer.cid=track.cid
+ AND album.aid=track.aid;
+ }
+} {1 {second argument to likelihood() must be a constant between 0.0 and 1.0}}
+
+# Commuting a term of the WHERE clause should not change the query plan
+#
+do_execsql_test whereG-3.0 {
+ CREATE TABLE a(a1 PRIMARY KEY, a2);
+ CREATE TABLE b(b1 PRIMARY KEY, b2);
+} {}
+do_eqp_test whereG-3.1 {
+ SELECT * FROM a, b WHERE b1=a1 AND a2=5;
+} {/.*SCAN TABLE a.*SEARCH TABLE b USING INDEX .*b_1 .b1=..*/}
+do_eqp_test whereG-3.2 {
+ SELECT * FROM a, b WHERE a1=b1 AND a2=5;
+} {/.*SCAN TABLE a.*SEARCH TABLE b USING INDEX .*b_1 .b1=..*/}
+do_eqp_test whereG-3.3 {
+ SELECT * FROM a, b WHERE a2=5 AND b1=a1;
+} {/.*SCAN TABLE a.*SEARCH TABLE b USING INDEX .*b_1 .b1=..*/}
+do_eqp_test whereG-3.4 {
+ SELECT * FROM a, b WHERE a2=5 AND a1=b1;
+} {/.*SCAN TABLE a.*SEARCH TABLE b USING INDEX .*b_1 .b1=..*/}
+
+# Ticket [1e64dd782a126f48d78c43a664844a41d0e6334e]:
+# Incorrect result in a nested GROUP BY/DISTINCT due to the use of an OP_SCopy
+# where an OP_Copy was needed.
+#
+do_execsql_test whereG-4.0 {
+ CREATE TABLE t4(x);
+ INSERT INTO t4 VALUES('right'),('wrong');
+ SELECT DISTINCT x
+ FROM (SELECT x FROM t4 GROUP BY x)
+ WHERE x='right'
+ ORDER BY x;
+} {right}
+
+#-------------------------------------------------------------------------
+# Test that likelihood() specifications on indexed terms are taken into
+# account by various forms of loops.
+#
+# 5.1.*: open ended range scans
+# 5.2.*: skip-scans
+#
+reset_db
+
+do_execsql_test 5.1 {
+ CREATE TABLE t1(a, b, c);
+ CREATE INDEX i1 ON t1(a, b);
+}
+do_eqp_test 5.1.2 {
+ SELECT * FROM t1 WHERE a>?
+} {0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a>?)}}
+do_eqp_test 5.1.3 {
+ SELECT * FROM t1 WHERE likelihood(a>?, 0.9)
+} {0 0 0 {SCAN TABLE t1}}
+do_eqp_test 5.1.4 {
+ SELECT * FROM t1 WHERE likely(a>?)
+} {0 0 0 {SCAN TABLE t1}}
+
+do_test 5.2 {
+ for {set i 0} {$i < 100} {incr i} {
+ execsql { INSERT INTO t1 VALUES('abc', $i, $i); }
+ }
+ execsql { INSERT INTO t1 SELECT 'def', b, c FROM t1; }
+ execsql { ANALYZE }
+} {}
+do_eqp_test 5.2.2 {
+ SELECT * FROM t1 WHERE likelihood(b>?, 0.01)
+} {0 0 0 {SEARCH TABLE t1 USING INDEX i1 (ANY(a) AND b>?)}}
+do_eqp_test 5.2.3 {
+ SELECT * FROM t1 WHERE likelihood(b>?, 0.9)
+} {0 0 0 {SCAN TABLE t1}}
+do_eqp_test 5.2.4 {
+ SELECT * FROM t1 WHERE likely(b>?)
+} {0 0 0 {SCAN TABLE t1}}
+
+do_eqp_test 5.3.1 {
+ SELECT * FROM t1 WHERE a=?
+} {0 0 0 {SEARCH TABLE t1 USING INDEX i1 (a=?)}}
+do_eqp_test 5.3.2 {
+ SELECT * FROM t1 WHERE likelihood(a=?, 0.9)
+} {0 0 0 {SCAN TABLE t1}}
+do_eqp_test 5.3.3 {
+ SELECT * FROM t1 WHERE likely(a=?)
+} {0 0 0 {SCAN TABLE t1}}
+
+finish_test
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