On Sep 13, 2009, at 10:22 PM, Pavel Stehule wrote:

2009/9/14 Tom Lane <t...@sss.pgh.pa.us>:
Robert Haas <robertmh...@gmail.com> writes:
So, I guess I'm sadly left feeling that we should probably reject this
patch.  Anyone want to argue otherwise?

+1. I'm really hoping to get something done about the plpgsql parsing
situation before 8.5 is out, so this should be a dead end anyway.


I have a WIP patch for integration main SQL parser to plpgsql. I'll
send it to this weekend.

I certainly don't mind the patch getting rejected and agree that refactoring the plpgsql parser is probably the best approach to this issue. However, I think it would be more than a little strange to ship the named notation feature without a solution for this problem. For reference, the problem is that the function below causes a compile error because of the way plpgsql blindly does variable replacement:

create function fun1(pDisplayName text) returns void as $$
begin
    perform fun2(pDisplayName as pDisplayName);
-- Above line compiles as:
--  SELECT  fun2( $1  as  $1 )
end
$$ language plpgsql;

-Steve

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