On Jan 2, 2014, at 3:00 PM, Brice André wrote:
> But I have still one question that remains :
>
> suppose I define an index on ('a', 'b') columns, will it be useful for a search on 'a' column only, or will it be
ignoreby postgresl ?
If you define the index on ('a', 'b') in that order and are just searching for 'a' in your query, the query planner
willuse the index.
Jonathan
