"for update" is somewhat database specific.
But it doesn't help. We are talking about bulk accessors here. The
transaction, if it is going to consider the original read, would be
long-lived, and unusable. The dependent object or some state object is read,
remotely modified, and passed back.
jim
> -----Original Message-----
> From: A mailing list for Enterprise JavaBeans development
> [mailto:[EMAIL PROTECTED]]On Behalf Of Bhattacharyya, Ana
> Sent: Wednesday, July 12, 2000 5:33 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Serialized Access
>
>
> this one is new to me! what is this "for update" clause? and how
> do u use it
> in a select clause? is it databse specific.
> TIA
> Anamitra
>
> -----Original Message-----
> From: Victor Langelo [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, July 12, 2000 5:14 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Serialized Access
>
>
> "Bhattacharyya, Ana" wrote:
>
> > also I cannot
> > do this check in two queries (first check the timestamp and then update)
> as
> > they cannot be made atomic.
> > correct me if I am wrong.
> >
>
> You use the for update clause when selecting the timestamp value.
> This will
> lock
> the record.
>
> --Victor
>
> ==================================================================
> =========
> To unsubscribe, send email to [EMAIL PROTECTED] and include
> in the body
> of the message "signoff EJB-INTEREST". For general help, send email to
> [EMAIL PROTECTED] and include in the body of the message "help".
>
>
> STATEMENT OF CONFIDENTIALITY. The information contained in this
> electronic
> message and any attachments to this message are intended for the exclusive
> use of the addressee(s) and may contain confidential or privileged
> information. If you are not the intended recipient, please notify
> USPowerSolutions Corporation immediately at (617) 547-3800, or at
> [EMAIL PROTECTED], and destroy all copies of this message and any
> attachments.
>
> ==================================================================
> =========
> To unsubscribe, send email to [EMAIL PROTECTED] and include
> in the body
> of the message "signoff EJB-INTEREST". For general help, send email to
> [EMAIL PROTECTED] and include in the body of the message "help".
>
>
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff EJB-INTEREST". For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".
