On 29 December 2012 01:36, Vlad Arkhipov <arhipov@dc.baikal.ru> wrote:
> Are there any plans on adding a rewriter hook?
I doubt it will ever happen.
If you look at QueryRewrite(Query *parsetree), the primary entry point
to the rewriter, it's easy enough to get a high level overview of what
goes on.
You can get the post-parse-analyze tree by registering a
post_parse_analyze_hook (like pg_stat_statements), and the same tree
*after* rule expansion by registering a planner_hook. It isn't obvious
what you're missing that a hook into the rewriter would get you.
--
Peter Geoghegan http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training and Services
