--
-- VARCHAR
--
CREATE TABLE VARCHAR_TBL(f1 varchar(1));
INSERT INTO VARCHAR_TBL (f1) VALUES ('a');
INSERT INTO VARCHAR_TBL (f1) VALUES ('A');
-- any of the following three input formats are acceptable
INSERT INTO VARCHAR_TBL (f1) VALUES ('1');
INSERT INTO VARCHAR_TBL (f1) VALUES (2);
INSERT INTO VARCHAR_TBL (f1) VALUES ('3');
-- zero-length char
INSERT INTO VARCHAR_TBL (f1) VALUES ('');
-- try varchar's of greater than 1 length
INSERT INTO VARCHAR_TBL (f1) VALUES ('cd');
ERROR:  value too long for type character varying(1)
INSERT INTO VARCHAR_TBL (f1) VALUES ('c     ');
SELECT * FROM VARCHAR_TBL;
 f1 
----
 a
 A
 1
 2
 3
 
 c
(7 rows)

SELECT c.*
   FROM VARCHAR_TBL c
   WHERE c.f1 <> 'a';
 f1 
----
 A
 1
 2
 3
 
 c
(6 rows)

SELECT c.*
   FROM VARCHAR_TBL c
   WHERE c.f1 = 'a';
 f1 
----
 a
(1 row)

SELECT c.*
   FROM VARCHAR_TBL c
   WHERE c.f1 < 'a';
 f1 
----
 1
 2
 3
 
(4 rows)

SELECT c.*
   FROM VARCHAR_TBL c
   WHERE c.f1 <= 'a';
 f1 
----
 a
 1
 2
 3
 
(5 rows)

SELECT c.*
   FROM VARCHAR_TBL c
   WHERE c.f1 > 'a';
 f1 
----
 A
 c
(2 rows)

SELECT c.*
   FROM VARCHAR_TBL c
   WHERE c.f1 >= 'a';
 f1 
----
 a
 A
 c
(3 rows)

DROP TABLE VARCHAR_TBL;
--
-- Now test longer arrays of char
--
CREATE TABLE VARCHAR_TBL(f1 varchar(4));
INSERT INTO VARCHAR_TBL (f1) VALUES ('a');
INSERT INTO VARCHAR_TBL (f1) VALUES ('ab');
INSERT INTO VARCHAR_TBL (f1) VALUES ('abcd');
INSERT INTO VARCHAR_TBL (f1) VALUES ('abcde');
ERROR:  value too long for type character varying(4)
INSERT INTO VARCHAR_TBL (f1) VALUES ('abcd    ');
SELECT * FROM VARCHAR_TBL;
  f1  
------
 a
 ab
 abcd
 abcd
(4 rows)