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help / color / mirror / Atom feedFrom: David G. Johnston <[email protected]>
To: Jan Behrens <[email protected]>
Cc: Isaac Morland <[email protected]>
Cc: Adrian Klaver <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: search_path for PL/pgSQL functions partially cached?
Date: Sat, 4 Jan 2025 18:19:22 -0700
Message-ID: <CAKFQuwbUwDW6Sm-QSmvJqXjrU6Rdj5VHwLc51Hax+HDmdVaa1g@mail.gmail.com> (raw)
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On Saturday, January 4, 2025, Jan Behrens <[email protected]> wrote:
>
> CREATE FUNCTION "foo_impl"("query_p" TEXT, "search_path_p" TEXT)
> RETURNS "some_type"
> LANGUAGE plpgsql SET search_path FROM CURRENT AS $$
> DECLARE
> "old_search_path" TEXT;
> "result" "some_type";
> BEGIN
> "old_search_path" = current_setting('search_path');
> PERFORM set_config('search_path', "search_path_p", TRUE);
> EXECUTE "query_p" INTO "result";
> PERFORM set_config('search_path', "old_search_path", TRUE);
> RETURN "result";
> END;
> $$;
>
You might consider adding a polymorphic argument for the result type. Then
if you call the function with two different typed inputs it will be cached
once for each.
“ Likewise, functions having polymorphic argument types have a separate
statement cache for each combination of actual argument types they have
been invoked for, so that data type differences do not cause unexpected
failures.”
David J.
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To: [email protected]
Cc: [email protected], [email protected], [email protected], [email protected], [email protected]
Subject: Re: search_path for PL/pgSQL functions partially cached?
In-Reply-To: <CAKFQuwbUwDW6Sm-QSmvJqXjrU6Rdj5VHwLc51Hax+HDmdVaa1g@mail.gmail.com>
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