[SQL] How to get text representation of composite value?

[David Flegl]

Hello,
  I'd like to ask you for a help. I'm in trouble with $subj. I need something 
like documentation of PostgreSQL in chapter 8.11.5 says.
Inside trigger I have record type NEW which is composite type.  How could one 
do something like :

   text_var:=to_char(NEW)

 So if NEW.at1='test' and NEW.at2=100 I would get string: 'test',100

 But the problem is then if trigger is generally used for many tables, I
 don't know number of elements and so on.

As I know, for element types are defined output function, and I can use this:
  SELECT textin(point_out('(1,1)'::point))::varchar;

Anybody can help me? 
P.S. pl/pgsql would be best way if it possible.


David F


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Re: [SQL] hi

[David Flegl]

Hi,
 try this. It's working...

SELECT t1.sno, sum(t2.value)
FROM temp as t1, temp as t2
WHERE t1.sno >= t2.sno
GROUP BY t1.sno;

but not completely. The problem is the this suppose your sno is uniqu. But as I 
see 3 is not.
Anyway it may help you.


>I have the data like this in temp table
>
>SQL> Select sno, value from temp;
>
>SNO   Value
>
>1 650.00
>
>2 850.00
>
>3 640.00
>
>3 985.00
>
>5 987.00
>
>9 9864.00
>
>7 875.00
>
>Now, I want display the result like this...
>
>SQL> Select sno, value, get_sum(value) as sum from temp;
>
>SNO   Value  SUM
>
>1 650.00 650.00
>
>2 850.00 1500.00   --650+850
>
>3 640.00 2140.00   --1500+640
>
>3 985.00 3125.00   -- 2140+985
>
>5 987.00 4112.00
>
>9 9864.00   13976.00
>
>7 875.00 14851.00
>
> 
>
>Any one can tell me query for this .. I don't want any procedure or
>function...
>
> 
>
> 
>
>Thanks & Regards
>
>Penchal Reddy
>
> 
>
>
>
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[SQL] NEW to plpythonu function?

[David Flegl]

Hi,
  may anyone help me with problem how to passed trigger row NEW from 
trigger function in plpgsql to other support function in plpythonu? I've 
tried something like>


CREATE FUNCTION pythfce(arg record)...
CREATE FUNCTION pythfce(arg anyelement)...

but now effect. I'm getting system messages like: plpythonu don't know 
argument type recort, anyelement)


P.S. I would like to have trigger function in plpgsql and supporting 
function in plpythonu, not to join them to plpythonu.


Thankx a lot

David Flegl

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