1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
--
-- Tests for some likely failure cases with combo cmin/cmax mechanism
--
CREATE TEMP TABLE combocidtest (foobar int);
BEGIN;
-- a few dummy ops to push up the CommandId counter
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest VALUES (1);
INSERT INTO combocidtest VALUES (2);
SELECT ctid,cmin,* FROM combocidtest;
SAVEPOINT s1;
UPDATE combocidtest SET foobar = foobar + 10;
-- here we should see only updated tuples
SELECT ctid,cmin,* FROM combocidtest;
ROLLBACK TO s1;
-- now we should see old tuples, but with combo CIDs starting at 0
SELECT ctid,cmin,* FROM combocidtest;
COMMIT;
-- combo data is not there anymore, but should still see tuples
SELECT ctid,cmin,* FROM combocidtest;
-- Test combo cids with portals
BEGIN;
INSERT INTO combocidtest VALUES (333);
DECLARE c CURSOR FOR SELECT ctid,cmin,* FROM combocidtest;
DELETE FROM combocidtest;
FETCH ALL FROM c;
ROLLBACK;
SELECT ctid,cmin,* FROM combocidtest;
-- check behavior with locked tuples
BEGIN;
-- a few dummy ops to push up the CommandId counter
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest SELECT 1 LIMIT 0;
INSERT INTO combocidtest VALUES (444);
SELECT ctid,cmin,* FROM combocidtest;
SAVEPOINT s1;
-- this doesn't affect cmin
SELECT ctid,cmin,* FROM combocidtest FOR UPDATE;
SELECT ctid,cmin,* FROM combocidtest;
-- but this does
UPDATE combocidtest SET foobar = foobar + 10;
SELECT ctid,cmin,* FROM combocidtest;
ROLLBACK TO s1;
SELECT ctid,cmin,* FROM combocidtest;
COMMIT;
SELECT ctid,cmin,* FROM combocidtest;
-- test for bug reported in
-- CABRT9RC81YUf1=jsmWopcKJEro=VoeG2ou6sPwyOUTx_qteRsg@mail.gmail.com
CREATE TABLE IF NOT EXISTS testcase(
id int PRIMARY KEY,
balance numeric
);
INSERT INTO testcase VALUES (1, 0);
BEGIN;
SELECT * FROM testcase WHERE testcase.id = 1 FOR UPDATE;
UPDATE testcase SET balance = balance + 400 WHERE id=1;
SAVEPOINT subxact;
UPDATE testcase SET balance = balance - 100 WHERE id=1;
ROLLBACK TO SAVEPOINT subxact;
-- should return one tuple
SELECT * FROM testcase WHERE id = 1 FOR UPDATE;
ROLLBACK;
DROP TABLE testcase;
|
