# 2014-04-21 # # 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 that ticket [b75a9ca6b0] has been fixed. # # Ticket [b75a9ca6b0] concerns queries that have both a GROUP BY # and an ORDER BY. This code verifies that SQLite is able to # optimize out the ORDER BY in some circumstances, but retains the # ORDER BY when necessary. # set testdir [file dirname $argv0] source $testdir/tester.tcl set testprefix tkt-b75a9ca6b0 do_execsql_test 1 { CREATE TABLE t1 (x, y); INSERT INTO t1 VALUES (1, 3); INSERT INTO t1 VALUES (2, 2); INSERT INTO t1 VALUES (3, 1); } do_execsql_test 1.1 { CREATE INDEX i1 ON t1(x, y); } set idxscan {0 0 0 {SCAN TABLE t1 USING COVERING INDEX i1}} set tblscan {0 0 0 {SCAN TABLE t1}} set grpsort {0 0 0 {USE TEMP B-TREE FOR GROUP BY}} set sort {0 0 0 {USE TEMP B-TREE FOR ORDER BY}} foreach {tn q res eqp} [subst -nocommands { 1 "SELECT * FROM t1 GROUP BY x, y ORDER BY x,y" {1 3 2 2 3 1} {$idxscan} 2 "SELECT * FROM t1 GROUP BY x, y ORDER BY x" {1 3 2 2 3 1} {$idxscan $sort} 3 "SELECT * FROM t1 GROUP BY y, x ORDER BY y, x" {3 1 2 2 1 3} {$idxscan $sort} 4 "SELECT * FROM t1 GROUP BY x ORDER BY x" {1 3 2 2 3 1} {$idxscan} 5 "SELECT * FROM t1 GROUP BY y ORDER BY y" {3 1 2 2 1 3} {$tblscan $grpsort} 6 "SELECT * FROM t1 GROUP BY y ORDER BY x" {1 3 2 2 3 1} {$tblscan $grpsort $sort} 7 "SELECT * FROM t1 GROUP BY x, y ORDER BY x, y DESC" {1 3 2 2 3 1} {$idxscan $sort} 8 "SELECT * FROM t1 GROUP BY x, y ORDER BY x DESC, y DESC" {3 1 2 2 1 3} {$idxscan $sort} 9 "SELECT * FROM t1 GROUP BY x, y ORDER BY x ASC, y ASC" {1 3 2 2 3 1} {$idxscan} 10 "SELECT * FROM t1 GROUP BY x, y ORDER BY x COLLATE nocase, y" {1 3 2 2 3 1} {$idxscan $sort} }] { do_execsql_test 1.$tn.1 $q $res do_eqp_test 1.$tn.2 $q $eqp } finish_test