Skip site navigation (1) Skip section navigation (2)

Re: Parsed Query Trees

From: Kevin Neufeld <kneufeld(at)refractions(dot)net>
To: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: Parsed Query Trees
Date: 2007-11-06 04:47:03
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-jdbc
Thanx guys.  I didn't clue in that the parsetrees underwent constant 
change - they obviously do since query syntax changes all the time.  I'm 
clearly going to have to approach my problem from a different angle.


Tom Lane wrote:
> Oliver Jowett <oliver(at)opencloud(dot)com> writes:
>> Kevin Neufeld wrote:
>>> Does anyone know if a parsed query tree object is exposed in the jdbc 
>>> API?  I couldn't find any such thing, nor could I find it in the 
>>> developers roadmap.
>> No, and the reason is that the JDBC driver doesn't actually parse the 
>> query beyond some basic manipulations to find parameter placeholders and 
>> so on. All the real parsing happens on the server side, and I don't know 
>> of a way to get access to the server's query tree as a client. (It's 
>> debatable how useful that would be, anyway)
> I'd very strongly resist exposing the server's parsetrees to clients,
> because then changing them would represent a protocol break, and we
> change them constantly.
> If you're desperate to have an editing facility like this, put it into
> server-side code ... and expect to revise it at every major release.
> 			regards, tom lane

In response to

pgsql-jdbc by date

Next:From: Oliver JowettDate: 2007-11-06 07:45:46
Subject: Re: How to get the SQL query from a PreparedStatement?
Previous:From: Tom LaneDate: 2007-11-06 03:25:34
Subject: Re: Parsed Query Trees

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group