AryaWu/sqlite

1# 2013-05-072#3# The author disclaims copyright to this source code.  In place of4# 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# This file implements regression tests for compound SELECT statements12# that have ORDER BY clauses with collating sequences that differ13# from the collating sequence used for comparison in the compound.14# 15# Ticket 6709574d2a8d8b9be3a9cb1afbf4ff2de48ea4e7:16# drh added on 2013-05-06 15:21:16:17#18# In the code shown below (which is intended to be run from the19# sqlite3.exe command-line tool) the three SELECT statements should all20# generate the same answer. But the third one does not. It is as if the21# COLLATE clause on the ORDER BY somehow got pulled into the EXCEPT22# operator. Note that the ".print" commands are instructions to the23# sqlite3.exe shell program to output delimiter lines so that you can more24# easily tell where the output of one query ends and the next query25# begins. 26# 27#     CREATE TABLE t1(a);28#     INSERT INTO t1 VALUES('abc'),('def');29#     CREATE TABLE t2(a);30#     INSERT INTO t2 VALUES('DEF');31# 32#     SELECT a FROM t1 EXCEPT SELECT a FROM t2 ORDER BY a;33#     .print -----34#     SELECT a FROM (SELECT a FROM t1 EXCEPT SELECT a FROM t2)35#      ORDER BY a COLLATE nocase;36#     .print -----37#     SELECT a FROM t1 EXCEPT SELECT a FROM t2 ORDER BY a COLLATE nocase;38# 39# Bisecting shows that this problem was introduced in SQLite version 3.6.040# by check-in [8bbfa97837a74ef] on 2008-06-15. 41#42 43set testdir [file dirname $argv0]44source $testdir/tester.tcl45 46do_test selectE-1.0 {47  db eval {48    CREATE TABLE t1(a);49    INSERT INTO t1 VALUES('abc'),('def'),('ghi');50    CREATE TABLE t2(a);51    INSERT INTO t2 VALUES('DEF'),('abc');52    CREATE TABLE t3(a);53    INSERT INTO t3 VALUES('def'),('jkl');54 55    SELECT a FROM t1 EXCEPT SELECT a FROM t256     ORDER BY a COLLATE nocase;57  }58} {def ghi}59do_test selectE-1.1 {60  db eval {61    SELECT a FROM t2 EXCEPT SELECT a FROM t362     ORDER BY a COLLATE nocase;63  }64} {abc DEF}65do_test selectE-1.2 {66  db eval {67    SELECT a FROM t2 EXCEPT SELECT a FROM t368     ORDER BY a COLLATE binary;69  }70} {DEF abc}71do_test selectE-1.3 {72  db eval {73    SELECT a FROM t2 EXCEPT SELECT a FROM t374     ORDER BY a;75  }76} {DEF abc}77 78do_test selectE-2.1 {79  db eval {80    DELETE FROM t2;81    DELETE FROM t3;82    INSERT INTO t2 VALUES('ABC'),('def'),('GHI'),('jkl');83    INSERT INTO t3 SELECT lower(a) FROM t2;84    SELECT a COLLATE nocase FROM t2 EXCEPT SELECT a FROM t385     ORDER BY 186  }87} {}88do_test selectE-2.2 {89  db eval {90    SELECT a COLLATE nocase FROM t2 EXCEPT SELECT a FROM t391     ORDER BY 1 COLLATE binary92  }93} {}94 95do_catchsql_test selectE-3.1 {96  SELECT 1 EXCEPT SELECT 2 ORDER BY 1 COLLATE nocase EXCEPT SELECT 3;97} {1 {ORDER BY clause should come after EXCEPT not before}}98 99 100finish_test101