Re: pivot functions with variable number of columns

2012/9/6 Misa Simic <misa.simic@gmail.com>:
> Hi Pavel,
>
> Hm... To me workaround looks as exactly as the same thing?
>
> 1) uses Dynamic SQL to bulid query (but returns refcursor insted of text)
>
> 2) client still needs to execute 2 commands (second is fetch instead of
> execute 'result')
>
> However, based on your name, and the name of the blog author :) I have made
> conlusion you are working on Stored Procedures things?

I worked on stored procedures - but not now - I have too much opened
projects, and I would to finish it before - this claim is free now :)
I am working (too slowly :( on PSM language).

Regards

Pavel


>
> I have a few questions about that... But will send another mail to dont mix
> subjects...
>
> Cheers,
>
> Misa
>
>
> On Thursday, September 6, 2012, Pavel Stehule wrote:
>>
>> Hello
>>
>> 2012/9/6 Misa Simic <misa.simic@gmail.com>:
>> > That is one of most wanted features of PostgreSQL, what is not solved
>> > yet,,,
>> >
>> > But it seems will be soon with introductions of Stored Procedures...
>> >
>>
>> I wish :)
>>
>> > For now, you must "know" what result (columns) you expects...
>> >
>> > So the only one option for now is to use Dynamic SQL - to build your
>> > query
>> > dynamically based on data in your table (based on column what should be
>> > pivoted)..
>> >
>> > And then execute that query...
>> >
>> > You can use your client side language to build SQL or inisde DB you
>> > could
>> > make function what returns "text" as your Dynamic SQL and then execute
>> > it
>> > from your client...
>> >
>>
>> there is a some workaround
>>
>> http://okbob.blogspot.cz/2008/08/using-cursors-for-generating-cross.html
>>
>> Pavel
>>
>> > Kind Regards,
>> >
>> > Misa
>> >
>> > 2012/9/6 punnoose <punnoose.pj@dwisesolutions.com>
>> >>
>> >> I want to have a pivot like function in which i should have variable
>> >> number
>> >> of columns.i went for crosstab but it doesnot support variable number
>> >> of
>> >> columns.Can any body suggest an alternative.like if i have a event at a
>> >> particular time of the day like one at 02:35,11:34, then i should have
>> >> column name 02:35,11:34.
>> >> Please do help me.
>> >> Punnoose
>> >>
>> >>
>> >>
>> >>
>> >> --
>> >> View this message in context:
>> >>
>> >> http://postgresql.1045698.n5.nabble.com/pivot-functions-with-variable-number-of-columns-tp5723013.html
>> >> Sent from the PostgreSQL - general mailing list archive at Nabble.com.
>> >>
>> >>
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>> >