Re: gin index postgres 9.2

"David G. Johnston" <david.g.johnston@gmail.com> writes:
> On Wed, May 25, 2016 at 7:42 PM, David G. Johnston <
> david.g.johnston@gmail.com> wrote:
>> ​What's the query with the revised parentheses?

> ​Never mind...your right I doubt that it should matter.

The parentheses in the original *definitely* matter, because by default
AND binds more tightly than OR.  The larger number of rows in the second
query are perfectly plausible given the parenthesis-omission.

            regards, tom lane