Re: R: Re: R: Re: Weird EXECUTE ... USING behaviour

2010/1/15 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>:
>>
>> 3. Then I need to add the TABLE-level CHECK condition in order to
>> exploit the "constraint_exclusion = on":
>>            execute $l2$
>>              alter table $l2$||ct||$l2$
>>                add check(  $l0$||co||$l0$ )
>>            $l2$ using $l0$||va||$l0$;
>>
>
> I am sorry, I am out. Your code isn't much readable:
>
> Minimally there isn't placeholder - some like $x
>
> It is game for the most cryptografic code :).
>
> You searching a functionality that isn't in pg now :(. Clause USING
> doesn't work like macros or templates in C++
>
> look on this page - maybe it could be useful for you
> http://wiki.postgresql.org/wiki/Sprintf
>
> Regards
> Pavel
>

Pavel,
It's worse than cryptographic if you skip the starting points. I do
admit it's far from plain PLPGSQL, though.
The "co" text variable contains the $x placeholders, the "va" text
variable contains the expressions to be used.

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Vincenzo Romano
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