I have a ques - say I have a table that has 10 columns. But in a simple select query from that table, I use just 3 columns. I want to know whether even for fetching 3 columns, read happens for all the 10 columns and out of that the required 3 columns are returned ? ie Does the complete row with all the 10 columns are fetched even though I need just 3 columns ? OR only 3 columns are fetched ?
Satish -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
