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-- ****************** test built-in type char **************
--
-- all inputs are SILENTLY truncated at 1 character
--
-- fixed-length by value
-- internally passed by value if <= 4 bytes in storage
-- Not sure why this is a really useful test,
-- but this test has been here forever. - thomas 1997-11-30
SELECT 'c'::char = 'c'::char AS true;
--
-- Build a table for testing
--
CREATE 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');
SELECT '' AS seven, CHAR_TBL.*;
SELECT '' AS six, c.*
FROM CHAR_TBL c
WHERE c.f1 <> 'a';
SELECT '' AS one, c.*
FROM CHAR_TBL c
WHERE c.f1 = 'a';
SELECT '' AS five, c.*
FROM CHAR_TBL c
WHERE c.f1 < 'a';
SELECT '' AS six, c.*
FROM CHAR_TBL c
WHERE c.f1 <= 'a';
SELECT '' AS one, c.*
FROM CHAR_TBL c
WHERE c.f1 > 'a';
SELECT '' AS two, c.*
FROM CHAR_TBL c
WHERE c.f1 >= 'a';
DROP TABLE CHAR_TBL;
--
-- Now test longer arrays of char
--
CREATE TABLE CHAR_TBL(f1 char(4));
INSERT INTO CHAR_TBL (f1) VALUES ('a');
INSERT INTO CHAR_TBL (f1) VALUES ('ab');
INSERT INTO CHAR_TBL (f1) VALUES ('abcd');
INSERT INTO CHAR_TBL (f1) VALUES ('abcde');
SELECT '' AS four, CHAR_TBL.*;
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