AryaWu/sqlite

1# 2012 April 192#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# The tests in this file were used while developing the SQLite 4 code. 12#13 14set testdir [file dirname $argv0]15source $testdir/tester.tcl16set testprefix tkt-2a5629202f17 18# This procedure executes the SQL.  Then it checks to see if the OP_Sort19# opcode was executed.  If an OP_Sort did occur, then "sort" is appended20# to the result.  If no OP_Sort happened, then "nosort" is appended.21#22# This procedure is used to check to make sure sorting is or is not23# occurring as expected.24#25proc cksort {sql} {26  set data [execsql $sql]27  if {[db status sort]} {set x sort} {set x nosort}28  lappend data $x29  return $data30}31 32do_execsql_test 1.1 {33  CREATE TABLE t8(b TEXT, c TEXT);34  INSERT INTO t8 VALUES('a',  'one');35  INSERT INTO t8 VALUES('b',  'two');36  INSERT INTO t8 VALUES(NULL, 'three');37  INSERT INTO t8 VALUES(NULL, 'four');38}39 40do_execsql_test 1.2 {41  SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c42} {null/four null/three a/one b/two}43 44do_execsql_test 1.3 {45  CREATE UNIQUE INDEX i1 ON t8(b);46  SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c47} {null/four null/three a/one b/two}48 49do_execsql_test 1.4 {50  DROP INDEX i1;51  CREATE UNIQUE INDEX i1 ON t8(b, c);52  SELECT coalesce(b, 'null') || '/' || c FROM t8 x ORDER BY x.b, x.c53} {null/four null/three a/one b/two}54 55#-------------------------------------------------------------------------56#57 58do_execsql_test 2.1 {59  CREATE TABLE t2(a, b NOT NULL, c);60  CREATE UNIQUE INDEX t2ab ON t2(a, b);61  CREATE UNIQUE INDEX t2ba ON t2(b, a);62}63 64do_test 2.2 {65  cksort { SELECT * FROM t2 WHERE a = 10 ORDER BY a, b, c }66} {nosort}67 68do_test 2.3 {69  cksort { SELECT * FROM t2 WHERE b = 10 ORDER BY a, b, c }70} {sort}71 72do_test 2.4 {73  cksort { SELECT * FROM t2 WHERE a IS NULL ORDER BY a, b, c }74} {sort}75 76finish_test77