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Checking if select statement in stored procedure returns string

How to check if a select statement inside a stored procedure returns any rows.

select * from creditcards;
If sqlcod = 0 THEN

I would like to do something like this, for example, but sqlcod does not work in MySql.

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2 answers


try using COUNT

,



DELIMITER $$
CREATE PROCEDURE procName()
BEGIN
    SET @recCount = (select count(*) from creditcards);
    If @recCount = 0 THEN
        -- statement here ;
    END IF;
END $$
DELIMITER ;
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Try using as below:

Use FOUND_ROWS()

and SQL_CALC_FOUND_ROWS

:



DELIMITER $$ 

create procedure myproc() 
begin 
   SELECT SQL_CALC_FOUND_ROWS * 
   FROM tbl_name 
   WHERE id > 100 
   LIMIT 10; 

   if SELECT FOUND_ROWS() = 0 then 
   -- log away bro! 
   end if; 
end $$
DELIMITER $$
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