| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Subject: | Re: Patch for 8.5, transformationHook |
| Date: | 2009-04-19 17:47:37 |
| Message-ID: | 162867790904191047s48d52633keca454852c2b27d2@mail.gmail.com |
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| Lists: | pgsql-hackers |
2009/4/19 Peter Eisentraut <peter_e(at)gmx(dot)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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