/trunk/test/alias.test |
@@ -0,0 +1,140 @@ |
# 2008 August 28 |
# |
# 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. |
# |
#*********************************************************************** |
# |
# This file implements regression tests for SQLite library. The |
# focus of this script is correct code generation of aliased result-set |
# values. See ticket #3343. |
# |
# $Id: alias.test,v 1.3 2009/04/23 13:22:44 drh Exp $ |
# |
set testdir [file dirname $argv0] |
source $testdir/tester.tcl |
|
# Aliases are currently evaluated twice. We might try to change this |
# in the future. But not now. |
return |
|
# A procedure to return a sequence of increasing integers. |
# |
namespace eval ::seq { |
variable counter 0 |
proc value {args} { |
variable counter |
incr counter |
return $counter |
} |
proc reset {} { |
variable counter |
set counter 0 |
} |
} |
|
|
do_test alias-1.1 { |
db function sequence ::seq::value |
db eval { |
CREATE TABLE t1(x); |
INSERT INTO t1 VALUES(9); |
INSERT INTO t1 VALUES(8); |
INSERT INTO t1 VALUES(7); |
SELECT x, sequence() FROM t1; |
} |
} {9 1 8 2 7 3} |
do_test alias-1.2 { |
::seq::reset |
db eval { |
SELECT x, sequence() AS y FROM t1 WHERE y>0 |
} |
} {9 1 8 2 7 3} |
do_test alias-1.3 { |
::seq::reset |
db eval { |
SELECT x, sequence() AS y FROM t1 WHERE y>0 AND y<99 |
} |
} {9 1 8 2 7 3} |
do_test alias-1.4 { |
::seq::reset |
db eval { |
SELECT x, sequence() AS y FROM t1 WHERE y>0 AND y<99 AND y!=55 |
} |
} {9 1 8 2 7 3} |
do_test alias-1.5 { |
::seq::reset |
db eval { |
SELECT x, sequence() AS y FROM t1 |
WHERE y>0 AND y<99 AND y!=55 AND y NOT IN (56,57,58) |
AND y NOT LIKE 'abc%' AND y%10==2 |
} |
} {8 2} |
do_test alias-1.6 { |
::seq::reset |
db eval { |
SELECT x, sequence() AS y FROM t1 WHERE y BETWEEN 0 AND 99 |
} |
} {9 1 8 2 7 3} |
#do_test alias-1.7 { |
# ::seq::reset |
# db eval { |
# SELECT x, sequence() AS y FROM t1 WHERE y IN (55,66,3) |
# } |
#} {7 3} |
do_test alias-1.8 { |
::seq::reset |
db eval { |
SELECT x, 1-sequence() AS y FROM t1 ORDER BY y |
} |
} {7 -2 8 -1 9 0} |
do_test alias-1.9 { |
::seq::reset |
db eval { |
SELECT x, sequence() AS y FROM t1 ORDER BY -y |
} |
} {7 3 8 2 9 1} |
do_test alias-1.10 { |
::seq::reset |
db eval { |
SELECT x, sequence() AS y FROM t1 ORDER BY x%2, y |
} |
} {8 2 9 1 7 3} |
|
unset -nocomplain random_int_list |
set random_int_list [db eval { |
SELECT random()&2147483647 AS r FROM t1, t1, t1, t1 ORDER BY r |
}] |
do_test alias-1.11 { |
lsort -integer $::random_int_list |
} $random_int_list |
|
|
do_test alias-2.1 { |
db eval { |
SELECT 4 UNION SELECT 1 ORDER BY 1 |
} |
} {1 4} |
do_test alias-2.2 { |
db eval { |
SELECT 4 UNION SELECT 1 UNION SELECT 9 ORDER BY 1 |
} |
} {1 4 9} |
|
if 0 { |
# Aliases in the GROUP BY clause cause the expression to be evaluated |
# twice in the current implementation. This might change in the future. |
# |
do_test alias-3.1 { |
::seq::reset |
db eval { |
SELECT sequence(*) AS y, count(*) AS z FROM t1 GROUP BY y ORDER BY z, y |
} |
} {1 1 2 1 3 1} |
} |
|
finish_test |