On 2015-07-04 01:39:42 +0900, Fujii Masao wrote: > Okay, so probably we need to change WAL replay of TRUNCATE so that > the index file is truncated to one containing only meta page instead of > empty one. That is, the WAL replay of TRUNCATE would need to call > index_build() after smgrtruncate() maybe. > > Then how should we implement that? Invent new WAL record type that > calls smgrtruncate() and index_build() during WAL replay? Or add the > special flag to XLOG_SMGR_TRUNCATE record, and make WAL replay > call index_build() only if the flag is found? Any other good idea? > Anyway ISTM that we might need to add or modify WAL record.
It's easy enough to log something like a metapage with log_newpage(). But the more interesting question is why that's not hhappening today. RelationTruncateIndexes() does call the index_build() which should end up WAL logging the index creation. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
