database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-12-24 14:17:58 +03:00
Code Activity

A SUM() of all NULLs returns NULL. A SUM() of nothing return 0.

Browse Source 
A SUM() of a mixture of NULLs and numbers returns the sum of the
numbers.  Ticket #1413. (CVS 2677)

FossilOrigin-Name: 2e6230edfd651b40481ebad8aa01a22ac92ce80c
This commit is contained in:
drh
2005-09-08 19:45:57 +00:00
parent 825c662e66
commit 3f219f46fc
5 changed files with 46 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
test/func.test
View File

@@ -11,7 +11,7 @@
# This file implements regression tests for SQLite library. The
# focus of this file is testing built-in functions.
#
# $Id: func.test,v 1.38 2005/09/08 10:37:01 drh Exp $
# $Id: func.test,v 1.39 2005/09/08 19:45:58 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@@ -513,5 +513,31 @@ do_test func-18.2 {
}
} {9902.0}
# The sum of nothing is 0. But the sum of all NULLs is NULL.
#
do_test func-18.3 {
execsql {
DELETE FROM t5;
SELECT sum(x) FROM t5;
}
} {0}
do_test func-18.4 {
execsql {
INSERT INTO t5 VALUES(NULL);
SELECT sum(x) FROM t5
}
} {{}}
do_test func-18.5 {
execsql {
INSERT INTO t5 VALUES(NULL);
SELECT sum(x) FROM t5
}
} {{}}
do_test func-18.6 {
execsql {
INSERT INTO t5 VALUES(123);
SELECT sum(x) FROM t5
}
} {123}
finish_test