Mysql function call

Question

If I call a function several time then will it execute every time or just execute once and the value will be used then after several time? Example:

 select my_fu         


        

Answer 1

It's very simple to run the MySQL function.

Login to MySQL command prompt using command:

$> mysql -u root -p

Then use the database using:

mysql> use database_name

Then run the MySQL function using:

mysql> delimiter //

mysql> CREATE PROCEDURE simpleproc (OUT param1 INT)
    -> BEGIN
    ->   SELECT COUNT(*) INTO param1 FROM t;
    -> END//
Query OK, 0 rows affected (0.00 sec)

mysql> delimiter ;

mysql> CALL simpleproc(@a);
Query OK, 0 rows affected (0.00 sec)

Instead of procedure we can add any multiple line function in above example.