Re: Index scan optimization

Heikki Linnakangas <hlinnakangas@vmware.com> writes:
> On 09/22/2014 07:47 AM, Rajeev rastogi wrote:
>> So my proposal is to skip the condition check on the first scan key condition for every tuple.

> The same happens in a single-column case. If you have a query like 
> "SELECT * FROM tbl2 where id2 > 'a'", once you've found the start 
> position of the scan, you know that all the rows that follow match too.

... unless you're doing a backwards scan.
        regards, tom lane