laurent.dechambe@xxxxxxxxxx schrieb am 17.04.2019 um 08:30: > I am working on PostgreSQL 10.5 and I have a discrepancy between clients regarding parallelism feature. > > For a simple query (say a simple SELECT COUNT(*) FROM BIG_TABLE), I > can see PostgreSQL use parallelism when the query is launched from > psql or PgAdmin4. However the same query launched with DBeaver (ie > connected through JDBC) does not use parallelism. > > SELECT current_setting('max_parallel_workers_per_gather') gives 10 > from my session. > > Is there a client configuration that prevents from using parallelism? Maybe DBeaver wraps the statement for some reason? (I have seen SQL clients do that) A CTE would prevent parallelism.