A simple MySQL function defines MySQLmysqlmysqldelimiter $ mysqlmysqlCREATEFUNCTIONmyFunction
A simple MySQL FUNCTION defines MySQL mysqlmysql delimiter $ mysqlmysql create function myFunction-(in_string VARCHAR (255),-in_find_str VARCHAR (20),-in_repl_str VARCHAR (20 )) --returns varchar (255)-BEGIN-DECLARE l_new_string VARCHAR (
A simple MySQL Function Definition
MySQL
mysql>mysql> delimiter $$mysql>mysql> CREATE FUNCTION myFunction -> (in_string VARCHAR(255), -> in_find_str VARCHAR(20), -> in_repl_str VARCHAR(20)) -> -> RETURNS VARCHAR(255) -> BEGIN -> DECLARE l_new_string VARCHAR(255); -> DECLARE l_find_pos INT; -> -> SET l_find_pos=INSTR(in_string,in_find_str); -> -> IF (l_find_pos>0) THEN -> SET l_new_string=INSERT(in_string,l_find_pos,LENGTH(in_find_str),in_repl_str); -> ELSE -> SET l_new_string=in_string; -> END IF; -> RETURN(l_new_string); -> -> END$$Query OK, 0 rows affected (0.00 sec)mysql>mysql> delimiter ;mysql> select myFunction('ABC','A','Z');+---------------------------+| myFunction('ABC','A','Z') |+---------------------------+| ZBC |+---------------------------+1 row in set (0.00 sec)mysql> drop function myFunction;Query OK, 0 rows affected (0.00 sec)mysql>mysql>