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SUM returns NULL when it has no inputs. Ticket #1413. (CVS 2678)

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FossilOrigin-Name: 6281859425d39c11d82875301fefafad1f08416d
This commit is contained in:
drh
2005-09-08 20:37:43 +00:00
parent 3f219f46fc
commit c2bd913a40
8 changed files with 52 additions and 36 deletions
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6
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 1.39 2005/09/08 19:45:58 drh Exp $
# $Id: func.test,v 1.40 2005/09/08 20:37:44 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@@ -513,14 +513,14 @@ do_test func-18.2 {
}
} {9902.0}
# The sum of nothing is 0. But the sum of all NULLs is NULL.
# The sum of nothing is NULL. 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);

4
test/select3.test
View File

@@ -12,7 +12,7 @@
# focus of this file is testing aggregate functions and the
# GROUP BY and HAVING clauses of SELECT statements.
#
# $Id: select3.test,v 1.15 2005/09/08 12:57:28 drh Exp $
# $Id: select3.test,v 1.16 2005/09/08 20:37:44 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@@ -233,7 +233,7 @@ do_test select3-7.2 {
execsql {
SELECT a, sum(b) FROM t2 WHERE b=5;
}
} {{} 0}
} {{} {}}
finish_test

4
test/select5.test
View File

@@ -12,7 +12,7 @@
# focus of this file is testing aggregate functions and the
# GROUP BY and HAVING clauses of SELECT statements.
#
# $Id: select5.test,v 1.12 2005/09/08 10:37:01 drh Exp $
# $Id: select5.test,v 1.13 2005/09/08 20:37:44 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@@ -118,7 +118,7 @@ do_test select5-4.5 {
execsql {
SELECT sum(x) FROM t1 WHERE x>100
}
} {0}
} {{}}
# Some tests for queries with a GROUP BY clause but no aggregate functions.
#

21
test/trigger2.test
View File

@@ -93,7 +93,8 @@ ifcapable subquery {
BEGIN
INSERT INTO rlog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM rlog),
old.a, old.b,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
(SELECT coalesce(sum(a),0) FROM tbl),
(SELECT coalesce(sum(b),0) FROM tbl),
new.a, new.b);
END;
@@ -101,7 +102,8 @@ ifcapable subquery {
BEGIN
INSERT INTO rlog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM rlog),
old.a, old.b,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
(SELECT coalesce(sum(a),0) FROM tbl),
(SELECT coalesce(sum(b),0) FROM tbl),
new.a, new.b);
END;
@@ -110,7 +112,8 @@ ifcapable subquery {
BEGIN
INSERT INTO clog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM clog),
old.a, old.b,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
(SELECT coalesce(sum(a),0) FROM tbl),
(SELECT coalesce(sum(b),0) FROM tbl),
new.a, new.b);
END;
}
@@ -140,7 +143,8 @@ ifcapable subquery {
BEGIN
INSERT INTO rlog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM rlog),
old.a, old.b,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
(SELECT coalesce(sum(a),0) FROM tbl),
(SELECT coalesce(sum(b),0) FROM tbl),
0, 0);
END;
@@ -148,7 +152,8 @@ ifcapable subquery {
BEGIN
INSERT INTO rlog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM rlog),
old.a, old.b,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
(SELECT coalesce(sum(a),0) FROM tbl),
(SELECT coalesce(sum(b),0) FROM tbl),
0, 0);
END;
}
@@ -172,7 +177,8 @@ ifcapable subquery {
BEGIN
INSERT INTO rlog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM rlog),
0, 0,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
(SELECT coalesce(sum(a),0) FROM tbl),
(SELECT coalesce(sum(b),0) FROM tbl),
new.a, new.b);
END;
@@ -180,7 +186,8 @@ ifcapable subquery {
BEGIN
INSERT INTO rlog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM rlog),
0, 0,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
(SELECT coalesce(sum(a),0) FROM tbl),
(SELECT coalesce(sum(b),0) FROM tbl),
new.a, new.b);
END;
}