RE: Parallel Inserts in CREATE TABLE AS

From: "Hou, Zhijie" <houzj(dot)fnst(at)cn(dot)fujitsu(dot)com>
To: Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>
Cc: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Luc Vlaming <luc(at)swarm64(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Zhihong Yu <zyu(at)yugabyte(dot)com>
Subject: RE: Parallel Inserts in CREATE TABLE AS
Date: 2020-12-10 10:29:33
Views: Raw Message | Whole Thread | Download mbox | Resend email
Lists: pgsql-hackers


+ allow = ps && IsA(ps, GatherState) && !ps->ps_ProjInfo &&
+ plannedstmt->parallelModeNeeded &&
+ plannedstmt->planTree &&
+ IsA(plannedstmt->planTree, Gather) &&
+ plannedstmt->planTree->lefttree &&
+ plannedstmt->planTree->lefttree->parallel_aware &&
+ plannedstmt->planTree->lefttree->parallel_safe;

I noticed it check both IsA(ps, GatherState) and IsA(plannedstmt->planTree, Gather).
Does it mean it is possible that IsA(ps, GatherState) is true but IsA(plannedstmt->planTree, Gather) is false ?

I did some test but did not find a case like that.

Best regards,

In response to


Browse pgsql-hackers by date

  From Date Subject
Next Message Amit Kapila 2020-12-10 11:12:12 Re: [Patch] Optimize dropping of relation buffers using dlist
Previous Message Andrey Borodin 2020-12-10 10:16:04 Re: Yet another fast GiST build