3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #*************************************************************************
12 # Test that ticket [b75a9ca6b0] has been fixed.
14 # Ticket [b75a9ca6b0] concerns queries that have both a GROUP BY
15 # and an ORDER BY. This code verifies that SQLite is able to
16 # optimize out the ORDER BY in some circumstances, but retains the
17 # ORDER BY when necessary.
20 set testdir [file dirname $argv0]
21 source $testdir/tester.tcl
22 set testprefix tkt-b75a9ca6b0
25 CREATE TABLE t1 (x, y);
26 INSERT INTO t1 VALUES (1, 3);
27 INSERT INTO t1 VALUES (2, 2);
28 INSERT INTO t1 VALUES (3, 1);
32 CREATE INDEX i1 ON t1(x, y);
35 set idxscan {0 0 0 {SCAN TABLE t1 USING COVERING INDEX i1}}
36 set tblscan {0 0 0 {SCAN TABLE t1}}
37 set grpsort {0 0 0 {USE TEMP B-TREE FOR GROUP BY}}
38 set sort {0 0 0 {USE TEMP B-TREE FOR ORDER BY}}
40 foreach {tn q res eqp} [subst -nocommands {
41 1 "SELECT * FROM t1 GROUP BY x, y ORDER BY x,y"
42 {1 3 2 2 3 1} {$idxscan}
44 2 "SELECT * FROM t1 GROUP BY x, y ORDER BY x"
45 {1 3 2 2 3 1} {$idxscan $sort}
47 3 "SELECT * FROM t1 GROUP BY y, x ORDER BY y, x"
48 {3 1 2 2 1 3} {$idxscan $sort}
50 4 "SELECT * FROM t1 GROUP BY x ORDER BY x"
51 {1 3 2 2 3 1} {$idxscan}
53 5 "SELECT * FROM t1 GROUP BY y ORDER BY y"
54 {3 1 2 2 1 3} {$tblscan $grpsort}
56 6 "SELECT * FROM t1 GROUP BY y ORDER BY x"
57 {1 3 2 2 3 1} {$tblscan $grpsort $sort}
59 7 "SELECT * FROM t1 GROUP BY x, y ORDER BY x, y DESC"
60 {1 3 2 2 3 1} {$idxscan $sort}
62 8 "SELECT * FROM t1 GROUP BY x, y ORDER BY x DESC, y DESC"
63 {3 1 2 2 1 3} {$idxscan $sort}
65 9 "SELECT * FROM t1 GROUP BY x, y ORDER BY x ASC, y ASC"
66 {1 3 2 2 3 1} {$idxscan}
68 10 "SELECT * FROM t1 GROUP BY x, y ORDER BY x COLLATE nocase, y"
69 {1 3 2 2 3 1} {$idxscan $sort}
72 do_execsql_test 1.$tn.1 $q $res
73 do_eqp_test 1.$tn.2 $q $eqp