3 ms·
Probably it is needed to check if the row is still visible to that transaction.
by agacera 9y ago
Probably it is needed to check if the row is still visible to that transaction.
- colanderman 9y agoPostgres uses a visibility bitmap [1] to avoid hitting the heap merely to determine visibility of stable data. [1] https://www.postgresql.org/docs/9.6/static/indexes-index-only-scans.html https://www.postgresql.org/docs/9.6/static/indexes-index-onl...