Re: [HACKERS] Statement Triggers. Ideas & help. - Mailing list pgsql-hackers

From Vadim Mikheev
Subject Re: [HACKERS] Statement Triggers. Ideas & help.
Date
Msg-id 37B8C10F.8AAD4608@krs.ru
Whole thread Raw
In response to Statement Triggers. Ideas & help.  ("F J Cuberos" <fjcuberos@infomail.lacaixa.es>)
Responses Re: [HACKERS] Statement Triggers. Ideas & help.
List pgsql-hackers
F J Cuberos wrote:
> 
> Forget the problem with Executeplan, I was getting the syslogs and stdour
> messages in the same screen; SO DOUBLE!!!!.
> 
> With statement triggers (and defined in SQL3 too) will be interesting to
> access OLD and NEW values of modified tables. How can be implemented? It´s
> possible to use MVCC for this?

MVCC uses t_xmin/t_xmax to decide what's visible to transaction.
For OLD/NEW you will have to analyze t_cmin/t_cmax as well.

Vadim


pgsql-hackers by date:

Previous
From: Vince Vielhaber
Date:
Subject: Re: [HACKERS] Re: [CORE] Re: tomorrow
Next
From: Bruce Momjian
Date:
Subject: Re: [HACKERS] Re: [CORE] Re: tomorrow