133 lines
3.2 KiB
Plaintext
133 lines
3.2 KiB
Plaintext
# 2001 September 15
|
|
#
|
|
# 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 file is testing SELECT statements that contain
|
|
# aggregate min() and max() functions and which are handled as
|
|
# as a special case.
|
|
#
|
|
# $Id: minmax.test,v 1.2 2002/05/27 01:04:51 drh Exp $
|
|
|
|
set testdir [file dirname $argv0]
|
|
source $testdir/tester.tcl
|
|
|
|
do_test minmax-1.0 {
|
|
execsql {
|
|
BEGIN;
|
|
CREATE TABLE t1(x, y);
|
|
INSERT INTO t1 VALUES(1,1);
|
|
INSERT INTO t1 VALUES(2,2);
|
|
INSERT INTO t1 VALUES(3,2);
|
|
INSERT INTO t1 VALUES(4,3);
|
|
INSERT INTO t1 VALUES(5,3);
|
|
INSERT INTO t1 VALUES(6,3);
|
|
INSERT INTO t1 VALUES(7,3);
|
|
INSERT INTO t1 VALUES(8,4);
|
|
INSERT INTO t1 VALUES(9,4);
|
|
INSERT INTO t1 VALUES(10,4);
|
|
INSERT INTO t1 VALUES(11,4);
|
|
INSERT INTO t1 VALUES(12,4);
|
|
INSERT INTO t1 VALUES(13,4);
|
|
INSERT INTO t1 VALUES(14,4);
|
|
INSERT INTO t1 VALUES(15,4);
|
|
INSERT INTO t1 VALUES(16,5);
|
|
INSERT INTO t1 VALUES(17,5);
|
|
INSERT INTO t1 VALUES(18,5);
|
|
INSERT INTO t1 VALUES(19,5);
|
|
INSERT INTO t1 VALUES(20,5);
|
|
COMMIT;
|
|
SELECT DISTINCT y FROM t1 ORDER BY y;
|
|
}
|
|
} {1 2 3 4 5}
|
|
|
|
do_test minmax-1.1 {
|
|
set sqlite_search_count 0
|
|
execsql {SELECT min(x) FROM t1}
|
|
} {1}
|
|
do_test minmax-1.2 {
|
|
set sqlite_search_count
|
|
} {19}
|
|
do_test minmax-1.3 {
|
|
set sqlite_search_count 0
|
|
execsql {SELECT max(x) FROM t1}
|
|
} {20}
|
|
do_test minmax-1.4 {
|
|
set sqlite_search_count
|
|
} {19}
|
|
do_test minmax-1.5 {
|
|
execsql {CREATE INDEX t1i1 ON t1(x)}
|
|
set sqlite_search_count 0
|
|
execsql {SELECT min(x) FROM t1}
|
|
} {1}
|
|
do_test minmax-1.6 {
|
|
set sqlite_search_count
|
|
} {1}
|
|
do_test minmax-1.7 {
|
|
set sqlite_search_count 0
|
|
execsql {SELECT max(x) FROM t1}
|
|
} {20}
|
|
do_test minmax-1.8 {
|
|
set sqlite_search_count
|
|
} {1}
|
|
do_test minmax-1.9 {
|
|
set sqlite_search_count 0
|
|
execsql {SELECT max(y) FROM t1}
|
|
} {5}
|
|
do_test minmax-1.10 {
|
|
set sqlite_search_count
|
|
} {19}
|
|
|
|
do_test minmax-2.0 {
|
|
execsql {
|
|
CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
|
|
INSERT INTO t2 SELECT * FROM t1;
|
|
}
|
|
set sqlite_search_count 0
|
|
execsql {SELECT min(a) FROM t2}
|
|
} {1}
|
|
do_test minmax-2.1 {
|
|
set sqlite_search_count
|
|
} {0}
|
|
do_test minmax-2.2 {
|
|
set sqlite_search_count 0
|
|
execsql {SELECT max(a) FROM t2}
|
|
} {20}
|
|
do_test minmax-2.3 {
|
|
set sqlite_search_count
|
|
} {0}
|
|
|
|
do_test minmax-3.0 {
|
|
execsql {INSERT INTO t2 VALUES((SELECT max(a) FROM t2)+1,999)}
|
|
set sqlite_search_count 0
|
|
execsql {SELECT max(a) FROM t2}
|
|
} {21}
|
|
do_test minmax-3.1 {
|
|
set sqlite_search_count
|
|
} {0}
|
|
do_test minmax-3.2 {
|
|
execsql {INSERT INTO t2 VALUES((SELECT max(a) FROM t2)+1,999)}
|
|
set sqlite_search_count 0
|
|
execsql {
|
|
SELECT b FROM t2 WHERE a=(SELECT max(a) FROM t2)
|
|
}
|
|
} {999}
|
|
do_test minmax-3.3 {
|
|
set sqlite_search_count
|
|
} {0}
|
|
|
|
do_test minmax-4.1 {
|
|
execsql {
|
|
SELECT coalesce(min(x),-1), coalesce(max(x),-1) FROM
|
|
(SELECT * FROM t1 UNION SELECT NULL as 'x', NULL as 'y')
|
|
}
|
|
} {-1 -1}
|
|
|
|
finish_test
|