On 2015/11/27 0:14, Kouhei Kaigai wrote: >> The documentation says as following so I think the former has. >> >> # I don't understhad what 'can or must' means, though... 'can and >> # must'? >> >> + Also, this callback can or must recheck scan qualifiers and join >> + conditions which are pushed down. Especially, it needs special
> If fdw_recheck_quals is set up correctly and join type is inner join, > FDW driver does not recheck by itself. Elsewhere, it has to recheck > the joined tuple, not only reconstruction. Sorry, I don't understand this. In my understanding, fdw_recheck_quals can be defined for a foreign join, regardless of the join type, and when the fdw_recheck_quals are defined, the RecheckForeignScan callback routine doesn't need to evaluate the fdw_recheck_quals by itself. No? Best regards, Etsuro Fujita -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
