Re: Trigger with WHEN clause (WIP)

2009/10/15 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
> Itagaki Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp> writes:
>> I think there is a benefit to provide WHEN cluase at least
>> for compatibility with other DBMSs, even through we can move
>> the expressions into the body of trigger functions.
>
> This seems to me to be a lot of code to accomplish nothing useful.
> It will always be the case that any nontrivial logic has to be done
> inside the trigger.  And the compatibility argument is entirely
> pointless given the lack of compatibility in the trigger function
> itself.
>
> -1
>

I disagree. When I analysed speed of some operations, I found some
unwanted trigger calls should to slow down applications. I am for any
method, that could to decrease trigger calls.

Regards
Pavel Stehule

>                        regards, tom lane
>
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