Re: obtaining row locking information

On Fri, Aug 19, 2005 at 09:19:24PM +0900, Tatsuo Ishii wrote:
> > Tatsuo Ishii <t-ishii(at)sra(dot)co(dot)jp> writes:
> > > To accomplish this I need to add following function into
> > > storage/ipc/procarray.c. This is similar to BackendPidGetProc() except
> > > that it accepts xid as an argument. Any objection?

I don't think it is critical for it to return valid answers for
subtransactions, but maybe you should add a note in the commentary about
it:

> /*
> * BackendXidGetPid -- get a backend's pid given its XID
> *
> * Returns 0 if not found or it's a prepared transaction. Note that
> * it is up to the caller to be sure that the question remains
> * meaningful for long enough for the answer to be used ...
*
* Only main transaction Ids are considered. This function is mainly
* useful for determining what backend owns a lock.
> */
> int
> BackendXidGetPid(TransactionId xid)
> {

--
Alvaro Herrera (<alvherre[a]alvh.no-ip.org>)
"The problem with the facetime model is not just that it's demoralizing, but
that the people pretending to work interrupt the ones actually working."
(Paul Graham)