Re: Problem in dynamic query execution in plpgsql

Hai Kretschmer ,
Thanks for your reply, it help to solve my problem. I have few for doubts
regarding dynamic query

I have a table structure:

Column | Type | Modifiers
--------+------------------+-----------
mf | double precision |
sf | double precision |
comm | integer |

I create a the following funtion

create or replace function test_perc() returns setof record as $body$

declare

vchr_query VARCHAR(100);

r record;

begin

--vchr_query:='SELECT mf,sf,comm,calc_perse(mf,sf,comm) as flt_claim from
calc';

vchr_query:= 'SELECT mf,sf,(mf – mf * comm /100) – (sf – sf * comm/100) as
flt_claim';

FOR r in EXECUTE vchr_query LOOP

RETURN NEXT r;

END LOOP;

RETURN;

end$body$
language 'plpgsql'

function created

but when I am traing to run this function I got the following error

ERROR: syntax error at or near "–" at character 18
QUERY: SELECT mf,sf,(mf – mf * comm /100) – (sf – sf * comm/100) as
flt_claim
CONTEXT: PL/pgSQL function "test_perc" line 7 at for over execute statement
LINE 1: SELECT mf,sf,(mf – mf * comm /100) – (sf – sf * comm/100) as...

How i can solve this ?

I tried another method to solve this

I create a function to calculate the value

create or replace function calc_perse(double precision,double
precision,double precision) returns double precision as $body$

declare

res double precision ;

begin

res :=( $1 - $1* $3/100 )- ($2 - $2*$3/100);

return res;

end$body$

language 'plpgsql'

Then i try to call it from another function

vchr_query:='SELECT mf,sf,comm,calc_perse(mf,sf,comm) as flt_claim from
calc';

FOR r in EXECUTE vchr_query LOOP

RETURN NEXT r;

END LOOP;

It also faild, How I can call a function like this from other function?

thanks in advance

Anoop G