Search code examples
mysqlstored-proceduresrowprocedure

My procedure deletes all rows when I use delete statement

That's my table: 

create table if not exists Ditte(nome varchar(30), luogo varchar(30), ZIP int);

That's my procedure:

delimiter // 
create procedure deleteDitta(zip int)
begin
DECLARE newZIP int;
SET newZIP = zip;
DELETE from Ditte where ZIP = newZIP;
end;
// 
delimiter ;

This is what I added in my table: 

insert ignore into Ditte values ("Ditta1", "city1", 6828);
insert ignore into Ditte values ("Ditta2", "city2", 12345);

When I call my procedure deleteDitta and I put "12345" as parameter (like this: call deleteDitta(12345);), the procedure should deletes only the second row in table "Ditte", but it deletes all the contents of the table. How can I fix it?

Solution

  • This seems to be MySQL getting confused about column names and variable names. Changing your procedure to this fixes the problem:

    create procedure deleteDitta(dzip int)
begin
    DELETE from Ditte where ZIP = dzip;
end;

    Demo on dbfiddle