On 2016-11-13 17:20:05 -0500, Tom Lane wrote: > Andres Freund <and...@anarazel.de> writes: > > I don't quite know what the hook in $subject was originally designed > > for, but right now it has the problem that it's not invoked for EXPLAIN > > EXECUTE. That's because ExplainExecuteQuery directly calls > > ExplainOnePlan instead of ExplainOneQuery_hook. > > > Unfortunately that's not entirely trivial to fix, because the hook > > accepts a Query, not a PlannedStmt. > > AFAIR, the purpose of that hook was to let index advisor plugins have > control of the planning step in an EXPLAIN, so that they could do things > like injecting hypothetical indexes. There isn't any easy way to do > something similar in EXPLAIN EXECUTE because the plan comes out of the > plancache.
> Why do you care? It's a pretty specialized hook. Citus currently uses it to output additional information for distributed queries. I suspect we'll instead, for now, have to intercept EXPLAIN as a whole then :( (moving to custom plans unfortunately is still a bit off unfortunately). Andres -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
