Re: parallelize queries containing subplans

From: Kuntal Ghosh <kuntalghosh(dot)2007(at)gmail(dot)com>
To: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
Cc: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: parallelize queries containing subplans
Date: 2017-01-19 10:12:26
Message-ID: CAGz5QCJLq0qnMq7KG5-6BM6P9AzyKarJq7=vHzxT1b9uvYKpMA@mail.gmail.com
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On Thu, Jan 19, 2017 at 3:19 PM, Kuntal Ghosh
<kuntalghosh(dot)2007(at)gmail(dot)com> wrote:
> Since Param is not parallel_safe till now, the SubPlan is also not
> parallel_safe. This is why CTE subplans will not be pushed under
> Gather.
Specifically, Params which are generated using generate_new_param()
are not parallel_safe. In the patch, it is marked as parallel-unsafe.

--
Thanks & Regards,
Kuntal Ghosh
EnterpriseDB: http://www.enterprisedb.com

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