in reply to Re: OT: help with MySQL questions
in thread OT: help with MySQL questions

Thanks, Roger!

The database is designed to, and can handle multiple connections at the same time.
Does that mean I can just use the normal queries? What does 'AutoCommit => 0' mean? Is it needed? In your example, why do you have two '$dbh->do{...};' statements?

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Re: Re: Re: OT: help with MySQL questions
by Roger (Parson) on Nov 25, 2003 at 03:24 UTC
      Does that mean I can just use the normal queries

    Of course you can use normal queries.

      What does 'AutoCommit => 0' mean

    If you specify AutoCommit => 0 in your database connection statement, it will tell the database that you want to do transactions. Why it's needed? Because I saw you mentioned that you had multiple tables that you wanted to update. Transactions are best used to preserve the integrity of your data, because the results will only be visible to others after you 'COMMIT' your transaction, in other words, other sessions will not see incomplete/half-updated data.

      why do you have two '$dbh->do{...};' statements

    The first one is just an example. The second one is required, because it does the 'COMMIT' to end the transaction.

    Update: I guess it would be useful to list this link here, an Overview on MySQL Transaction.

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