On Dec 27, 2011, at 1:12 PM, Tom Lane wrote:
> Jim Crate writes:
>> My question is why does it do a seq scan when it flattens this
>> subquery into a JOIN?
>
> Because it thinks there will be 3783 rows out of the msg scan, which if
> true would make your desired nestl
Cond: (ema.message_id = msg.id)
Total runtime: 273.679 ms
Jim Crate
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