Chris Angelico <rosuav(at)gmail(dot)com> writes:
> On Sat, May 19, 2012 at 3:09 AM, Steve Crawford
> <scrawford(at)pinpointresearch(dot)com> wrote:
>> I also don't understand the "xcrm.channel_id in (1)" instead of
>> "xcrm.channel_id = 1" unless this is a generated query and there could be
>> multiple ids in that condition.
> Side point from this thread. Is there ever any difference between
> these two constructs?
According to transformAExprIn() in parse_expr.c, no.
regards, tom lane