Larry Rosenman <ler@lerctr.org> writes:
> Question: Do all these need to have a bare index just on the account_id
> column, or is a multicolumn index with account_id first
> sufficient for the check to be reasonably quick?
I would think that such an index would be sufficient, but you could
check for yourself by doing something like
explain select 1 from <table> where account_id = <something>
and verifying that you get an indexscan not a seqscan, for each
dependent table.
regards, tom lane
