On Thu, Nov 5, 2015 at 12:52 AM, Haribabu Kommi <kommi.harib...@gmail.com> wrote: >> Now instead of displaying Partial Seq Scan, if we just display Seq Scan, >> then it might confuse user, so it is better to add some thing indicating >> parallel node if we want to go this route. > > IMO, the change from Partial Seq Scan to Seq Scan may not confuse user, > if we clearly specify in the documentation that all plans under a Gather node > are parallel plans. > > This is possible for the execution nodes that executes fully under a > Gather node. > The same is not possible for parallel aggregates, so we have to mention the > aggregate node below Gather node as partial only. > > I feel this suggestion arises as may be because of some duplicate code between > Partial Seq Scan and Seq scan. By using Seq Scan node only if we display as > Partial Seq Scan by storing some flag in the plan? This avoids the > need of adding > new plan nodes.
I was thinking about this idea: 1. Add a parallel_aware flag to each plan. 2. If the flag is set, have EXPLAIN print the word "Parallel" before the node name. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
