From: Albert Cervera Areny <albert@sedifa.com>
To: pgsql-performance@postgresql.org
Cc: Linux Guru <linux.binary@gmail.com>
Subject: Re: Creating and updating table using function parameter reference
Date: Wed, 13 Feb 2008 16:23:56 +0100
Message-ID: <200802131623.57343.albert@sedifa.com> (raw)
In-Reply-To: <3caa866c0802130625k728a4a5dl23bffb56c1ded6e9@mail.gmail.com>
References: <3caa866c0802130625k728a4a5dl23bffb56c1ded6e9@mail.gmail.com>
A Dimecres 13 Febrer 2008 15:25, Linux Guru va escriure:
> I want to create and update two tables in a function such as below, but
> using parameters as tablename is not allowed and gives an error. Is there
> any way I could achieve this?
You're looking for EXECUTE:
http://www.postgresql.org/docs/8.3/static/plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN>
> CREATE OR REPLACE FUNCTION test ( t1 text,t2 text ) RETURNS numeric AS $$
> declare temp1 text;
> declare temp2 text;
> begin
> temp1=t1;
> temp2=t2;
> select
> product,
> (case when sum(pd) <> 0 then sum(gd)/sum(pd)*100 else 0 end ) as gppp
> into temp2 from temp1 as dummy
> group by dummy.product,dummy.totalclaimsgroup,dummy.avgmems,dummy.months;
>
> update temp1 as t set
> GPPP=(select gppp from temp2 as dummy where dummy.product=t.product),
>
> end
> $$ LANGUAGE plpgsql
>
>
> ----------------------
> ERROR: syntax error at or near "$1"
> LINE 1: ...en sum(gd)/sum(pd)*100 else 0 end ) as gppp from $1 as dum...
> ^
> QUERY: select product, (case when sum(pd) <> 0 then sum(gd)/sum(pd)*100
> else 0 end ) as gppp from $1 as dummy group by dummy.product,
> dummy.totalclaimsgroup,dummy.avgmems,dummy.months
> CONTEXT: SQL statement in PL/PgSQL function "test" near line 10
>
> ********** Error **********
>
> ERROR: syntax error at or near "$1"
> SQL state: 42601
> Context: SQL statement in PL/PgSQL function "test" near line 10
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To: pgsql-performance@postgresql.org
Cc: albert@sedifa.com, linux.binary@gmail.com
Subject: Re: Creating and updating table using function parameter reference
In-Reply-To: <200802131623.57343.albert@sedifa.com>
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