Re: Patch for 8.5, transformationHook - Mailing list pgsql-hackers

From Pavel Stehule
Subject Re: Patch for 8.5, transformationHook
Date
Msg-id 162867790904191047s48d52633keca454852c2b27d2@mail.gmail.com
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In response to Re: Patch for 8.5, transformationHook  (Peter Eisentraut <peter_e@gmx.net>)
Responses Re: Patch for 8.5, transformationHook
List pgsql-hackers
2009/4/19 Peter Eisentraut <peter_e@gmx.net>:
> On Saturday 18 April 2009 18:09:00 Pavel Stehule wrote:
>> There are lot of things, that should be done with current grammar only
>> on transformation stage. Currently pg do it now. There are lot of
>> pseudo functions, that are specially transformed: least, greatest,
>> coalesce. After hooking we should do some similar work from outer
>> libraries.
>
> There are surely other ways to accomplish this than an expression
> transformation hook.  Adding a property or two to the function definition to
> do what you want could do it.
>

should you describe it little bit more?

regards
Pavel


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