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 #***********************************************************************
11 # This file implements regression tests for SQLite library.
13 # Specifically, it tests cases where the expressions in a GROUP BY
14 # clause are the same as those in the ORDER BY clause.
17 set testdir [file dirname $argv0]
18 source $testdir/tester.tcl
19 set ::testprefix orderbyA
21 proc do_sortcount_test {tn sql cnt res} {
22 set eqp [execsql "EXPLAIN QUERY PLAN $sql"]
23 set rcnt [regexp -all {USE TEMP} $eqp]
24 uplevel [list do_test $tn.1 [list set {} $rcnt] $cnt]
25 uplevel [list do_execsql_test $tn.2 $sql $res]
29 CREATE TABLE t1(a, b, c);
30 INSERT INTO t1 VALUES('one', 1, 11);
31 INSERT INTO t1 VALUES('three', 7, 11);
32 INSERT INTO t1 VALUES('one', 2, 11);
33 INSERT INTO t1 VALUES('one', 3, 11);
34 INSERT INTO t1 VALUES('two', 4, 11);
35 INSERT INTO t1 VALUES('two', 6, 11);
36 INSERT INTO t1 VALUES('three', 8, 11);
37 INSERT INTO t1 VALUES('two', 5, 11);
38 INSERT INTO t1 VALUES('three', 9, 11);
43 2 {CREATE INDEX i1 ON t1(a)}
44 3 {CREATE INDEX i1 ON t1(a DESC)}
46 execsql { DROP INDEX IF EXISTS i1 }
49 # $match is the number of temp-table sorts we expect if the GROUP BY
50 # can use the same sort order as the ORDER BY. $nomatch is the number
51 # of expected sorts if the GROUP BY and ORDER BY are not compatible.
59 do_sortcount_test 1.$tn.1.1 {
60 SELECT a, sum(b) FROM t1 GROUP BY a ORDER BY a
61 } $match {one 6 three 24 two 15}
62 do_sortcount_test 1.$tn.1.2 {
63 SELECT a, sum(b) FROM t1 GROUP BY a ORDER BY a DESC
64 } $match {two 15 three 24 one 6}
66 do_sortcount_test 1.$tn.2.1 {
67 SELECT a, sum(b) FROM t1 GROUP BY a ORDER BY a||''
68 } $nomatch {one 6 three 24 two 15}
69 do_sortcount_test 1.$tn.2.2 {
70 SELECT a, sum(b) FROM t1 GROUP BY a ORDER BY a||'' DESC
71 } $nomatch {two 15 three 24 one 6}
73 do_sortcount_test 1.$tn.3.1 {
74 SELECT a, sum(b) FROM t1 GROUP BY a ORDER BY a NULLS LAST
75 } $nomatch {one 6 three 24 two 15}
76 do_sortcount_test 1.$tn.3.2 {
77 SELECT a, sum(b) FROM t1 GROUP BY a ORDER BY a DESC NULLS FIRST
78 } $nomatch {two 15 three 24 one 6}
81 #-------------------------------------------------------------------------
83 CREATE TABLE t2(a, b, c);
84 INSERT INTO t2 VALUES(1, 'one', 1);
85 INSERT INTO t2 VALUES(1, 'two', 2);
86 INSERT INTO t2 VALUES(1, 'one', 3);
87 INSERT INTO t2 VALUES(1, 'two', 4);
88 INSERT INTO t2 VALUES(1, 'one', 5);
89 INSERT INTO t2 VALUES(1, 'two', 6);
91 INSERT INTO t2 VALUES(2, 'one', 7);
92 INSERT INTO t2 VALUES(2, 'two', 8);
93 INSERT INTO t2 VALUES(2, 'one', 9);
94 INSERT INTO t2 VALUES(2, 'two', 10);
95 INSERT INTO t2 VALUES(2, 'one', 11);
96 INSERT INTO t2 VALUES(2, 'two', 12);
98 INSERT INTO t2 VALUES(NULL, 'one', 13);
99 INSERT INTO t2 VALUES(NULL, 'two', 14);
100 INSERT INTO t2 VALUES(NULL, 'one', 15);
101 INSERT INTO t2 VALUES(NULL, 'two', 16);
102 INSERT INTO t2 VALUES(NULL, 'one', 17);
103 INSERT INTO t2 VALUES(NULL, 'two', 18);
109 2 { CREATE INDEX i2 ON t2(a, b) }
110 3 { CREATE INDEX i2 ON t2(a DESC, b DESC) }
112 4 { CREATE INDEX i2 ON t2(a, b DESC) }
113 5 { CREATE INDEX i2 ON t2(a DESC, b) }
115 execsql { DROP INDEX IF EXISTS i2 }
119 set nSort [expr ($tn==2 || $tn==3) ? 0 : 1]
120 do_sortcount_test 2.$tn.1.1 {
121 SELECT a, b, sum(c) FROM t2 GROUP BY a, b ORDER BY a, b;
122 } $nSort {{} one 45 {} two 48 1 one 9 1 two 12 2 one 27 2 two 30}
123 do_sortcount_test 2.$tn.1.2 {
124 SELECT a, b, sum(c) FROM t2 GROUP BY a, b ORDER BY a DESC, b DESC;
125 } $nSort {2 two 30 2 one 27 1 two 12 1 one 9 {} two 48 {} one 45}
127 set nSort [expr ($tn==4 || $tn==5) ? 0 : 1]
128 do_sortcount_test 2.$tn.2.1 {
129 SELECT a, b, sum(c) FROM t2 GROUP BY a, b ORDER BY a, b DESC;
130 } $nSort { {} two 48 {} one 45 1 two 12 1 one 9 2 two 30 2 one 27 }
131 do_sortcount_test 2.$tn.2.2 {
132 SELECT a, b, sum(c) FROM t2 GROUP BY a, b ORDER BY a DESC, b;
133 } $nSort { 2 one 27 2 two 30 1 one 9 1 two 12 {} one 45 {} two 48 }
135 # ORDER BY can never piggyback on the GROUP BY sort if it uses
136 # non-standard NULLS behaviour.
137 set nSort [expr $tn==1 ? 2 : 1]
138 do_sortcount_test 2.$tn.3.1 {
139 SELECT a, b, sum(c) FROM t2 GROUP BY a, b ORDER BY a, b DESC NULLS FIRST;
140 } $nSort { {} two 48 {} one 45 1 two 12 1 one 9 2 two 30 2 one 27 }
141 do_sortcount_test 2.$tn.3.2 {
142 SELECT a, b, sum(c) FROM t2 GROUP BY a, b ORDER BY a DESC, b NULLS LAST;
143 } $nSort { 2 one 27 2 two 30 1 one 9 1 two 12 {} one 45 {} two 48 }