> Actually, the index returns page numbers in the table on disc which
> may contain one or more rows that are relevant. Postgres has to fetch
> the whole row to find out the email_id and any other information,
> including whether the row is visible in your current transaction
> (concurrency control complicates it all). Just having a page number
> isn't much use to you!
>
> Matthew
>
I learn something new every day.
Thanks Matthew.