SET sql_mode=ORACLE;
#
# MDEV-13003 - Oracle compatibility : Replace function
#
SELECT REPLACE(null,'a','b') ;
REPLACE(null,'a','b')
NULL
SELECT REPLACE('ab',null,'b') ;
REPLACE('ab',null,'b')
ab
SELECT REPLACE('ab','a',null) ;
REPLACE('ab','a',null)
b
SELECT REPLACE('ab',null,null) ;
REPLACE('ab',null,null)
ab
SELECT REPLACE('aaa','a',null) ;
REPLACE('aaa','a',null)
NULL
EXPLAIN EXTENDED SELECT REPLACE('ab','a',null) ;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1003	select replace_oracle('ab','a',NULL) AS "REPLACE('ab','a',null)"
CREATE VIEW v1 AS SELECT REPLACE('ab','a',null) ;
SHOW CREATE VIEW v1;
View	Create View	character_set_client	collation_connection
v1	CREATE VIEW "v1" AS select replace_oracle('ab','a',NULL) AS "REPLACE('ab','a',null)"	latin1	latin1_swedish_ci
SELECT * FROM v1;
REPLACE('ab','a',null)
b
DROP VIEW v1;