With index only scans, the comments in src/backend/access/heap/visibilitymap.c are probably out of date, starting with:
"Currently, the visibility map is only used as a hint" Also, is there a discussion of how and why index-only scans is safe? i.e. what lock, if any, has to be held while nodeIndexonlyscan.c calls visibilitymap_test? Do index-only scans need a README file? Thanks, Jeff -- Sent via pgsql-hackers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
