| From: | Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | "Hou, Zhijie" <houzj(dot)fnst(at)cn(dot)fujitsu(dot)com>, Luc Vlaming <luc(at)swarm64(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Zhihong Yu <zyu(at)yugabyte(dot)com> |
| Subject: | Re: Parallel Inserts in CREATE TABLE AS |
| Date: | 2020-12-07 10:50:14 |
| Message-ID: | CALj2ACU2LzR5DcYQRZWcnLY-RoD1PbWnQ7pNcdFoAOJhh37KCA@mail.gmail.com |
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On Mon, Dec 7, 2020 at 4:04 PM Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>
> What is the need of checking query_level when 'isForCTAS' is set only
> when Gather is a top-node?
>
isForCTAS is getting set before pg_plan_query() which is being used in
cost_gather(). We will not have a Gather node by then and hence will
not pass queryDesc to IsParallelInsertInCTASAllowed(into, NULL) while
setting isForCTAS to true. Intention to check query_level == 1 in
cost_gather is to consider for only top level query not for other sub
queries.
With Regards,
Bharath Rupireddy.
EnterpriseDB: http://www.enterprisedb.com
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