On Mon, 17 Aug 2009 12:48:21 +0200
Pavel Stehule <pavel.stehule@xxxxxxxxx> wrote:
> Hello
>
> I am not sure, if it's possible for you. PostgreSQL 8.4 has EXECUTE
> USING clause, it is 100% safe.
Sorry I don't get it.
How can I use USING safely when the substitution involves a table
name?
The examples I've seen just involve column values.
Where is the corresponding fine manual page?
Still I don't get how USING could make safer plpgsql functions...
well... I'm going to check some prejudices I have on pg functions
firts...
I thought that if you passed eg. text to
create or replace function typetest(a int) returns text as
$$
begin
raise notice 'is this an int? %', a;
-- don't do anything else with a
and calling
select * from typetest('tonno');
was going to raise an error anyway.
So somehow I find the example here
http://okbob.blogspot.com/2008/06/execute-using-feature-in-postgresql-84.html
not really helpful in understanding what's going on.
Maybe an example with text comparing a version using quote_literal
and one using USING could be clearer...
or am I completely missing the point?
far from an optimal solution I've built a "client side" array of
permitted table, key to dynamically build the query on the client
side.
--
Ivan Sergio Borgonovo
http://www.webthatworks.it
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