4
-- fixed-length by value
5
-- internally passed by value if <= 4 bytes in storage
6
SELECT char 'c' = char 'c' AS true;
13
-- Build a table for testing
15
CREATE TABLE CHAR_TBL(f1 char);
16
INSERT INTO CHAR_TBL (f1) VALUES ('a');
17
INSERT INTO CHAR_TBL (f1) VALUES ('A');
18
-- any of the following three input formats are acceptable
19
INSERT INTO CHAR_TBL (f1) VALUES ('1');
20
INSERT INTO CHAR_TBL (f1) VALUES (2);
21
INSERT INTO CHAR_TBL (f1) VALUES ('3');
23
INSERT INTO CHAR_TBL (f1) VALUES ('');
24
-- try char's of greater than 1 length
25
INSERT INTO CHAR_TBL (f1) VALUES ('cd');
26
ERROR: value too long for type character(1)
27
INSERT INTO CHAR_TBL (f1) VALUES ('c ');
28
SELECT '' AS seven, * FROM CHAR_TBL;
61
SELECT '' AS five, c.*
105
-- Now test longer arrays of char
107
CREATE TABLE CHAR_TBL(f1 char(4));
108
INSERT INTO CHAR_TBL (f1) VALUES ('a');
109
INSERT INTO CHAR_TBL (f1) VALUES ('ab');
110
INSERT INTO CHAR_TBL (f1) VALUES ('abcd');
111
INSERT INTO CHAR_TBL (f1) VALUES ('abcde');
112
ERROR: value too long for type character(4)
113
INSERT INTO CHAR_TBL (f1) VALUES ('abcd ');
114
SELECT '' AS four, * FROM CHAR_TBL;