Question

I have this stored procedure, which has been working for a little while

CREATE PROCEDURE `ProjectFromTemplate`(
IN TemplateID INT,
IN NewProjectID INT
)
BEGIN
INSERT INTO Project_Stage
(
  ProjectID,
  StageID,
  StageIndex,
  Time
)
(
SELECT 
  NewProjectID,
  StageID,
  StageIndex,
  Time
  FROM Project_Stage
  WHERE ProjectID = TemplateID
);
END

But I decided to add another column to the table, but I didn’t update the procedure accordingly. I would like the procedure to be able to handle any new rows that I add. I need something like this pseudo-SQL

CREATE PROCEDURE `ProjectFromTemplate`(
IN TemplateID INT,
IN NewProjectID INT
)
BEGIN
INSERT INTO Project_Stage
(
  ProjectID,
  *
)
(
SELECT 
  NewProjectID,
  *
  FROM Project_Stage
  WHERE ProjectID = TemplateID
);
END

Is there a way to express something like ‘all the subsequent rows’ in MySQL?

Answer 1

Leave out the column clause in your INSERT to minimize the code changes, but you have to spell out the rest of the columns from Project_Stage unless it doesn’t contain a ProjectID column. If it doesn’t, then your good.

Beware: you might still need to recompile after altering the table, though (I’m not sure how MySQL handles schema changes and compiled procs).

CREATE PROCEDURE `ProjectFromTemplate`(
    IN TemplateID INT,
    IN NewProjectID INT
)
BEGIN
    INSERT INTO Project_Stage    
    SELECT 
        NewProjectID,
        ...
        the rest of the Project_Stage columns you want go here
        ...
        FROM Project_Stage
        WHERE ProjectID = TemplateID
    );
END