Nested function call : Function « Procedure Function « SQL / MySQL

1. SQL / MySQL
2. Procedure Function
3. Function

Nested function call

    
mysql>
mysql> DELIMITER //
mysql>
mysql> CREATE FUNCTION myFunction (rush_ship INT(10)) RETURNS DECIMAL(10,2)
    -> BEGIN
    ->
    -> DECLARE rush_shipping_cost DECIMAL(10,2);
    ->
    -> CASE rush_ship
    -> WHEN 1 THEN
    ->         SET rush_shipping_cost = 20.00;
    -> WHEN 2 THEN
    ->         SET rush_shipping_cost = 15.00;
    -> WHEN 3 THEN
    ->         SET rush_shipping_cost = 10.00;
    -> ELSE
    ->         SET rush_shipping_cost = 0.00;
    -> END CASE;
    ->
    -> RETURN rush_shipping_cost;
    ->
    -> END
    -> //
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> CREATE FUNCTION myFunction1 (item_sum DECIMAL(10,2))
    -> RETURNS DECIMAL(10,1)
    -> BEGIN
    ->
    -> RETURN myFunction(1);
    ->
    -> END
    -> //
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> DELIMITER ;
mysql>
mysql>
mysql> select myFunction1(1);
+----------------+
| myFunction1(1) |
+----------------+
|           20.0 |
+----------------+
1 row in set (0.00 sec)

mysql>
mysql>
mysql> drop function myFunction1;
Query OK, 0 rows affected (0.00 sec)

mysql> drop function myFunction;
Query OK, 0 rows affected (0.00 sec)

mysql>

          
    
    
  

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