blob: 120fed53e5c39d572ff0fe66bba2a90d5ce32d92 (
plain)
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
|
--
-- CHAR
--
-- Per SQL standard, CHAR means character(1), that is a varlena type
-- with a constraint restricting it to one character (not byte)
SELECT char 'c' = char 'c' AS true;
--
-- Build a table for testing
-- (This temporarily hides the table created in test_setup.sql)
--
CREATE TEMP TABLE CHAR_TBL(f1 char);
INSERT INTO CHAR_TBL (f1) VALUES ('a');
INSERT INTO CHAR_TBL (f1) VALUES ('A');
-- any of the following three input formats are acceptable
INSERT INTO CHAR_TBL (f1) VALUES ('1');
INSERT INTO CHAR_TBL (f1) VALUES (2);
INSERT INTO CHAR_TBL (f1) VALUES ('3');
-- zero-length char
INSERT INTO CHAR_TBL (f1) VALUES ('');
-- try char's of greater than 1 length
INSERT INTO CHAR_TBL (f1) VALUES ('cd');
INSERT INTO CHAR_TBL (f1) VALUES ('c ');
SELECT * FROM CHAR_TBL;
SELECT c.*
FROM CHAR_TBL c
WHERE c.f1 <> 'a';
SELECT c.*
FROM CHAR_TBL c
WHERE c.f1 = 'a';
SELECT c.*
FROM CHAR_TBL c
WHERE c.f1 < 'a';
SELECT c.*
FROM CHAR_TBL c
WHERE c.f1 <= 'a';
SELECT c.*
FROM CHAR_TBL c
WHERE c.f1 > 'a';
SELECT c.*
FROM CHAR_TBL c
WHERE c.f1 >= 'a';
DROP TABLE CHAR_TBL;
--
-- Now test longer arrays of char
--
-- This char_tbl was already created and filled in test_setup.sql.
-- Here we just try to insert bad values.
--
INSERT INTO CHAR_TBL (f1) VALUES ('abcde');
SELECT * FROM CHAR_TBL;
--
-- Also test "char", which is an ad-hoc one-byte type. It can only
-- really store ASCII characters, but we allow high-bit-set characters
-- to be accessed via bytea-like escapes.
--
SELECT 'a'::"char";
SELECT '\101'::"char";
SELECT '\377'::"char";
SELECT 'a'::"char"::text;
SELECT '\377'::"char"::text;
SELECT '\000'::"char"::text;
SELECT 'a'::text::"char";
SELECT '\377'::text::"char";
SELECT ''::text::"char";
|
