Tim Armstrong has posted comments on this change. Change subject: Add doc for MT_DOP query option. ......................................................................
Patch Set 1: (1 comment) http://gerrit.cloudera.org:8080/#/c/5652/1/docs/topics/impala_mt_dop.xml File docs/topics/impala_mt_dop.xml: Line 43: </p> I think it would make sense to document (for now) that many queries don't support mt_dop, so that users aren't surprised to get an error after setting it. E.g. [localhost:21000] > set mt_dop=1; MT_DOP set to 1 [localhost:21000] > select * from functional.alltypes a1 inner join functional.alltypes a2 on a1.id = a2.id limit 4; Query: select * from functional.alltypes a1 inner join functional.alltypes a2 on a1.id = a2.id limit 4 Query submitted at: 2017-01-18 14:49:46 (Coordinator: http://tarmstrong-box:25000) ERROR: NotImplementedException: MT_DOP not supported for plans with base table joins or table sinks. -- To view, visit http://gerrit.cloudera.org:8080/5652 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: Ife2786532b425af6d230074f1c0b5c7dcb2b8a92 Gerrit-PatchSet: 1 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: John Russell <jruss...@cloudera.com> Gerrit-Reviewer: Alex Behm <alex.b...@cloudera.com> Gerrit-Reviewer: Mostafa Mokhtar <mmokh...@cloudera.com> Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com> Gerrit-HasComments: Yes