Re: event triggers with args?

On 2015-02-25 10:43:57 +0100, Fabien COELHO wrote:
> 
> While looking at event triggers, I noticed that, contrary to basic triggers,
> arguments are not allowed.
> 
> However, the example in the documentation with an hour-based filtering of
> ddl commands suggest some handling of arguments would be useful so as to
> allow more generic event triggers.
> 
> So I have a question: is there a particular reason why arguments were not
> provided in the first place?

Yea. The existing trigger argument mechanims is extremely odd
implementation wise - they don't have real datatypes and aren't passed
via the normal parameter passing mechanism. IIRC we discussed this back
when it was introduced and decided against introducing for now.

I think the whole trigger argument infrastructure, even for normal
triggers, should be rewritten. After that we could think of adding it
for event triggers.

Greetings,

Andres Freund

-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
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