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MySQL stored-procedure: out parameter?
Here is a stored procedure that takes one parameter for input (IN) and second parameter for output (OUT)
mysql> delimiter // mysql> create procedure Sp_SQRT(IN Number1 INT, OUT Number2 FLOAT) -> Begin -> set Number2=sqrt(Number1); -> end; -> // Query OK, 0 rows affected (0.24 sec) mysql> delimiter ;
Call the stored procedure and send the value to the user variable. The syntax is as follows
CALL yourStoredProcedureName(anyIntegerValue,@anyVariableName);
Check what value is stored in the variable @anyVariableName. The syntax is as follows
SELECT @anyVariableName;
Created the stored procedure with the name ‘Sp_SQRT’. The query is as follows to call the stored procedure
mysql> call Sp_SQRT(36,@MySquareRootNumber); Query OK, 0 rows affected (0.02 sec)
Check the value of variable @MySquareRootNumber using select statement
mysql> select @MySquareRootNumber;
The following is the output
+---------------------+ | @MySquareRootNumber | +---------------------+ | 6 | +---------------------+ 1 row in set (0.00 sec)
Updated on: 30-Jul-2019
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