I'm trying to write a sql statement that will insert data given a few setup variables. I don't want to create a stored procedure, as it's not something I'll be dealing with anywhere except as an administrator and I don't want the stored procedure hanging around. I just want a statement that works. Here's what I have so far:
SET @app = 7;
SET @time = UNIX_TIMESTAMP(NOW());
SET @maxValue = 100;
SET @decrement = 10;
SET @category = 1;
SET @minSubcategory = 0;
SET @maxSubcategory = 19;
SET @subcategory = @minSubcategory;
SET @idx = 0;
SET @id = CONCAT('TempId', @idx+1);
SELECT @name:=username FROM user WHERE id = @id;
SET @value = @maxValue - @decrement * @idx;
INSERT INTO data (userId, username, app, category, subcategory, value, date) VALUES
(@id, @name, @app, @category, @subcategory, @value, @time);
SET @idx = @idx+ 1;
IF @idx > 10 THEN
END LOOP insert_loop;
SET @subcategory = @subcategory + 1;
IF @subcategory > @maxSubcategory THEN
END LOOP subcat_loop;
But it doesn't like the
SET @idx = 0 inside the loop for some reason. What am I doing wrong?
Note that this is probably the first time I've tried doing anything this complicated with MySQL, and my little knowledge is probably more dangerous than being completely oblivious, so let me know if I'm going about this the wrong way completely (although I really, really don't want a stored procedure for this).
Unfortunately you can't use LOOP outside of a stored program: stored procedures, stored functions, and triggers.
You do have some options:
Otherwise, if you still don't want to create a stored procedure, your best bet is to write a small script in shell, python, etc to do your looping.