# tests updates that sets invalid range when we set value at max boundary that is less than max.
--disable_warnings
DROP DATABASE IF EXISTS test_empty_strings;
CREATE DATABASE test_empty_strings;
USE test_empty_strings;
--enable_warnings

CREATE TABLE t(s text) ENGINE=COLUMNSTORE;
INSERT INTO t(s) VALUES (''), (NULL);

SELECT COUNT(*) FROM t WHERE s IS NULL;
SELECT COUNT(*) FROM t WHERE s IS NOT NULL;

SELECT * FROM t;

DROP TABLE t;

CREATE TABLE t(s text) ENGINE=COLUMNSTORE;
# this will test different code path in writeengine.
INSERT INTO t(s) VALUES ('');
INSERT INTO t(s) VALUES (NULL);

SELECT * FROM t;

SELECT COUNT(*) FROM t WHERE s IS NULL;

DROP TABLE t;

CREATE TABLE t(s text) ENGINE=COLUMNSTORE;
# handling of some obsucure pseudo-null magic value.
INSERT INTO t(s) VALUES ('_CpNuLl_'),(''), (NULL);

SELECT * FROM t;

SELECT COUNT(*) FROM t WHERE s IS NULL;

DROP TABLE t;

# There is a problem with comparison
CREATE TABLE t(c6 CHAR(6)) ENGINE=COLUMNSTORE;

INSERT INTO t(c6) VALUES ('a'), ('b'), ('c');

SELECT 2, COUNT(*) FROM t WHERE (c6 <= 'b' OR c6 <= '');

SELECT 2, COUNT(*) FROM t WHERE (c6 <= 'b');

SELECT 0, COUNT(*) FROM t WHERE (c6 <= '');

SELECT 0, COUNT(*) FROM t WHERE (c6 <= ' ');

SELECT 2, COUNT(*) FROM t WHERE (c6 <= 'b' OR c6 <= ' ');

SELECT 0, COUNT(*) FROM t WHERE (c6 < '');

SELECT 0, COUNT(*) FROM t WHERE (c6 < ' ');

DROP TABLE IF EXISTS t;
CREATE TABLE t(a CHAR(10)) ENGINE=COLUMNSTORE;
INSERT INTO t(a) VALUES (''), (NULL), ('   '), (' a ');
SELECT LTRIM_ORACLE(a) FROM t;
SELECT RTRIM_ORACLE(a) FROM t;

DROP DATABASE test_empty_strings;