INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Does this function follow ansi sql standard?

Does this function follow ansi sql standard?

(OP)
Hi,

I was wondering if anyone can tell me if this function follows ANSI SQL standard, and for future reference are there any resources that i can use to find if my SQL conforms to ANSI standards. And the DBMS i am using is MySQL.

CREATE FUNCTION INCREMENT()
RETURNS INT
BEGIN
DECLARE old INT;
DECLARE new INT;
SELECT current INTO old FROM table FOR UPDATE;
SET new=old +1;
UPDATE table SET current=new;
RETURN new;
END;

Thanks.

RE: Does this function follow ansi sql standard?

(OP)
Thanks for the reply PHV, i wont actually use those variable names, besides that does it conform to ANSI.

RE: Does this function follow ansi sql standard?

Does the table always contain exactly one row? If not, a cursor is needed! (Or a where clause that restricts the result set to one row...)

You may also have to specify access mode to allow the table update:

CREATE FUNCTION INCREMENT()
RETURNS INT
MODIFIES SQL DATA
BEGIN
...

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Resources

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close