Re: Deparsing DDL command strings

On Friday, October 05, 2012 04:24:55 PM Tom Lane wrote:
> Andres Freund <andres@2ndquadrant.com> writes:
> > On Friday, October 05, 2012 04:03:03 PM Tom Lane wrote:
> >> Why don't you just pass the original query string, instead of writing
> >> a mass of maintenance-requiring new code to reproduce it?
> > 
> > Its not easy to know which tables are referenced in e.g. an ALTER TABLE
> > statement if the original statement didn't schema qualify everything.
> 
> What he's talking about is deparsing the raw grammar output, which by
> definition contains no more information than is in the query string.
> Deparsing post-parse-analysis trees is a different problem (for which
> code already exists, unlike the raw-tree case).

Sure. I am not saying Dimitri's approach is perfect. I am just listing some of 
reasons why I think just using the raw input string isn't sufficient...

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