OT: (Way OT) PHP and MySQL concurrency control using MyISAM tables

Da Rock rock_on_the_web at comcen.com.au
Sun Mar 23 16:48:03 PDT 2008

On Sun, 2008-03-23 at 19:17 -0400, Bill Moran wrote:
> Da Rock <rock_on_the_web at comcen.com.au> wrote:
> >
> > I know this is not quite the list for these things, but I tried the PHP
> > list and got no reply whatsoever. In fact, I don't think anyone's home
> > cause the entire list is silent...
> > 
> > I'm trying to setup a system using web apps in PHP using MySQL as the
> > backend database, only this time I need transaction services. According
> > to the PHP manual if a transaction is served for MySQL it can come back
> > as committed even though it may not. So what I'm trying to accomplish is
> > develop some row level locking with the PHP script.
> > 
> > I enquired about setting up a servlet (for want of a better term) with
> > PHP, something that will serve the requests of the rest of the app. To
> > be honest though, I'm not entirely sure how to approach this.
> Wow.  That's one crazy attempt at a workaround.
> The correct solution is to use the correct tool for the job.  Either
> install PostgreSQL and use it instead, or use InnoDB tables.

Actually, I think I may have got some facts confused here- I thought
that MyISAM was not supposed to be transaction supported, but according
to most stuff I've read it supports table level transaction locking.

And the PHP manual says it will only come back with a false commit IF
the table DOESN'T support transactions at all.

So what is the truth here? If MyISAM supports transaction table locking
I may be ok here- and save myself a hell of a lot of trouble to boot.

Thanks guys, again.

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