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NULL values are distinct. A comparison involving a NULL is always false.

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Operations on a NULL value yield a NULL result.  This change makes SQLite
operate more like the SQL spec, but it may break existing applications that
assumed the old behavior.  All the old tests pass but we still need to add
new tests to better verify the new behavior.  Fix for ticket #44. (CVS 589)

FossilOrigin-Name: 9051173742f1b0e15a809d12a0c9c98fd2c4614d
This commit is contained in:
drh
2002-05-26 20:54:33 +00:00
parent 195e6967fb
commit f5905aa7be
15 changed files with 485 additions and 238 deletions
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14
test/trigger2.test
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@ -77,7 +77,7 @@ foreach tbl_defn [ list \
CREATE TRIGGER before_update_row BEFORE UPDATE ON tbl FOR EACH ROW
BEGIN
INSERT INTO rlog VALUES ( (SELECT max(idx) + 1 FROM rlog),
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),
new.a, new.b);
@ -85,7 +85,7 @@ foreach tbl_defn [ list \
CREATE TRIGGER after_update_row AFTER UPDATE ON tbl FOR EACH ROW
BEGIN
INSERT INTO rlog VALUES ( (SELECT max(idx) + 1 FROM rlog),
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),
new.a, new.b);
@ -94,7 +94,7 @@ foreach tbl_defn [ list \
CREATE TRIGGER conditional_update_row AFTER UPDATE ON tbl FOR EACH ROW
WHEN old.a = 1
BEGIN
INSERT INTO clog VALUES ( (SELECT max(idx) + 1 FROM clog),
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),
new.a, new.b);
@ -120,7 +120,7 @@ foreach tbl_defn [ list \
INSERT INTO tbl VALUES (300, 200);
CREATE TRIGGER delete_before_row BEFORE DELETE ON tbl FOR EACH ROW
BEGIN
INSERT INTO rlog VALUES ( (SELECT max(idx) + 1 FROM rlog),
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),
0, 0);
@ -128,7 +128,7 @@ foreach tbl_defn [ list \
CREATE TRIGGER delete_after_row AFTER DELETE ON tbl FOR EACH ROW
BEGIN
INSERT INTO rlog VALUES ( (SELECT max(idx) + 1 FROM rlog),
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),
0, 0);
@ -148,7 +148,7 @@ foreach tbl_defn [ list \
DELETE FROM rlog;
CREATE TRIGGER insert_before_row BEFORE INSERT ON tbl FOR EACH ROW
BEGIN
INSERT INTO rlog VALUES ( (SELECT max(idx) + 1 FROM rlog),
INSERT INTO rlog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM rlog),
0, 0,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
new.a, new.b);
@ -156,7 +156,7 @@ foreach tbl_defn [ list \
CREATE TRIGGER insert_after_row AFTER INSERT ON tbl FOR EACH ROW
BEGIN
INSERT INTO rlog VALUES ( (SELECT max(idx) + 1 FROM rlog),
INSERT INTO rlog VALUES ( (SELECT coalesce(max(idx),0) + 1 FROM rlog),
0, 0,
(SELECT sum(a) FROM tbl), (SELECT sum(b) FROM tbl),
new.a, new.b);