Transferring MSSQL Stored Procedures to MySQL - mysql

Question

I have an MSSQL stored procedure as follows :-
CREATE PROCEDURE [dbo].[user_CheckEMail]
#Email nvarchar(200)
AS
BEGIN
IF EXISTS (SELECT * FROM user_Data WHERE EMail = #Email)
BEGIN
RETURN 1
END
ELSE
BEGIN
RETURN 0
END
END
In changing to MySQL I know that certain things need to change. This is what I have :-
CREATE PROCEDURE server.`user_CheckEMail`(
IN Email nvarchar(200))
BEGIN
DECLARE this_count int;
SET this_count = (SELECT COUNT(*) FROM user_Data WHERE EMail = Email)
IF (this_count > 0) THEN
RETURN 1
ELSE
RETURN 0
END IF
END
In this state "int" is highlighted with "syntax error, unexpected END_OF_INPUT, expecting ';'"
By removing the ";" the Declare line loses it's error, but the Set line now shows "syntax error, unexpected SET, expecting ';'"
If I remove the Declare statement altogether the Set line is fine and the If line returns "syntax error, unexpected IF, expecting ';'"
Finally, by placing ';' at the end of the Set statement the Set returns error "syntax error, unexpected END_OF_INPUT, expecting ';'" while the If now errors "syntax error, unexpected IF"
I know that this is only a basic procedure, but I have about two dozen to move across and all are showing errors, so I'm hoping find out what I'm doing wrong here and I'll be able to cure all problems.....hopefully.

Answer 1

Try this-
DELIMITER $$
CREATE PROCEDURE server.`user_CheckEMail`(
IN Email nvarchar(200))
BEGIN
DECLARE this_count int;
SET this_count = (SELECT COUNT(*) FROM user_Data WHERE EMail = Email);
IF (this_count > 0) THEN
RETURN 1
ELSE
RETURN 0
END IF;
END$$
By default MySQL treats semicolon(;) as the statement terminator or end of statement. But as we need to use it inside the procedure body, so we need another different delimiter to state the end of the stored procedure. Here DELIMITER $$ sets $$ as the statement terminator.