William Blunn <bill+postgre...@blunn.org> writes: > Will the query engine retrieve the entire row (including 10 megabytes of > out-of-line TOASTed data) for every row, and then pick out column > "name", and take an age to do so,
No. That's pretty much the whole point of the TOAST mechanism; out-of-line values are not fetched unless actually needed. See http://developer.postgresql.org/pgdocs/postgres/storage-toast.html regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
