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From: Tom Lane <tgl@sss.pgh.pa.us>
To: "=?gb18030?B?sKTM38jL?=" <2363541664@qq.com>
cc: "=?gb18030?B?cGdzcWwtcGVyZm9ybWFuY2U=?="
 <pgsql-performance@postgresql.org>
Subject: Re: is there any way we can push join predicate into inner table
In-reply-to: <tencent_38B35CB76BAA9EC85B7BCF20@qq.com>
References: <tencent_38B35CB76BAA9EC85B7BCF20@qq.com>
Comments: In-reply-to "=?gb18030?B?sKTM38jL?=" <2363541664@qq.com>
 message dated "Mon, 31 Aug 2015 21:51:54 +0800"
Date: Mon, 31 Aug 2015 10:36:01 -0400
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"=?gb18030?B?sKTM38jL?=" <2363541664@qq.com> writes:
>  So, the question is, is there any way we can push join predicate into inner table ( we can disable merge join and hash join to get NL Join, but join predicate is not able to push into inner table )?

You probably need to turn on use_remote_estimate; postgres_fdw won't
consider parameterized paths without that, because it has no way to
compare costs.

			regards, tom lane


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