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| 1 # 2014-04-21 | |
| 2 # | |
| 3 # The author disclaims copyright to this source code. In place of | |
| 4 # a legal notice, here is a blessing: | |
| 5 # | |
| 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. | |
| 9 # | |
| 10 #************************************************************************* | |
| 11 # | |
| 12 # Test that ticket [b75a9ca6b0] has been fixed. | |
| 13 # | |
| 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. | |
| 18 # | |
| 19 | |
| 20 set testdir [file dirname $argv0] | |
| 21 source $testdir/tester.tcl | |
| 22 set testprefix tkt-b75a9ca6b0 | |
| 23 | |
| 24 do_execsql_test 1 { | |
| 25 CREATE TABLE t1 (x, y); | |
| 26 INSERT INTO t1 VALUES (1, 3); | |
| 27 INSERT INTO t1 VALUES (2, 2); | |
| 28 INSERT INTO t1 VALUES (3, 1); | |
| 29 } | |
| 30 | |
| 31 do_execsql_test 1.1 { | |
| 32 CREATE INDEX i1 ON t1(x, y); | |
| 33 } | |
| 34 | |
| 35 set idxscan {0 0 0 {SCAN TABLE t1 USING COVERING INDEX i1}} | |
| 36 set tblscan {0 0 0 {SCAN TABLE t1}} | |
| 37 set grpsort {0 0 0 {USE TEMP B-TREE FOR GROUP BY}} | |
| 38 set sort {0 0 0 {USE TEMP B-TREE FOR ORDER BY}} | |
| 39 | |
| 40 foreach {tn q res eqp} [subst -nocommands { | |
| 41 1 "SELECT * FROM t1 GROUP BY x, y ORDER BY x,y" | |
| 42 {1 3 2 2 3 1} {$idxscan} | |
| 43 | |
| 44 2 "SELECT * FROM t1 GROUP BY x, y ORDER BY x" | |
| 45 {1 3 2 2 3 1} {$idxscan $sort} | |
| 46 | |
| 47 3 "SELECT * FROM t1 GROUP BY y, x ORDER BY y, x" | |
| 48 {3 1 2 2 1 3} {$idxscan $sort} | |
| 49 | |
| 50 4 "SELECT * FROM t1 GROUP BY x ORDER BY x" | |
| 51 {1 3 2 2 3 1} {$idxscan} | |
| 52 | |
| 53 5 "SELECT * FROM t1 GROUP BY y ORDER BY y" | |
| 54 {3 1 2 2 1 3} {$tblscan $grpsort} | |
| 55 | |
| 56 6 "SELECT * FROM t1 GROUP BY y ORDER BY x" | |
| 57 {1 3 2 2 3 1} {$tblscan $grpsort $sort} | |
| 58 | |
| 59 7 "SELECT * FROM t1 GROUP BY x, y ORDER BY x, y DESC" | |
| 60 {1 3 2 2 3 1} {$idxscan $sort} | |
| 61 | |
| 62 8 "SELECT * FROM t1 GROUP BY x, y ORDER BY x DESC, y DESC" | |
| 63 {3 1 2 2 1 3} {$idxscan $sort} | |
| 64 | |
| 65 9 "SELECT * FROM t1 GROUP BY x, y ORDER BY x ASC, y ASC" | |
| 66 {1 3 2 2 3 1} {$idxscan} | |
| 67 | |
| 68 10 "SELECT * FROM t1 GROUP BY x, y ORDER BY x COLLATE nocase, y" | |
| 69 {1 3 2 2 3 1} {$idxscan $sort} | |
| 70 | |
| 71 }] { | |
| 72 do_execsql_test 1.$tn.1 $q $res | |
| 73 do_eqp_test 1.$tn.2 $q $eqp | |
| 74 } | |
| 75 | |
| 76 | |
| 77 finish_test | |
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