Dimitris Tsirogiannis has posted comments on this change. Change subject: IMPALA-4166: Add SORT BY sql clause ......................................................................
Patch Set 3: (1 comment) Lars, a few high level questions before I start the next review iteration. Thanks http://gerrit.cloudera.org:8080/#/c/6495/3//COMMIT_MSG Commit Message: PS3, Line 13: Specifying SORT BY columns also enables clustering during inserts, : so the SORT node will contain all partitioning columns first, followed : by the SORT BY columns. Can you expand the comment a little bit on the semantics of this? A few high level questions are: 1. What is the connection between this and the sortby() hints? Can I use both? What if there is a conflict? Same for clustered hint. 2. Why does sort by enables clustering as well? 3. Can I specify any table columns (even the partitioning columns) in the SORT BY clause or are there some restrictions? 4. I suppose this works for all table types (including Kudu)? -- To view, visit http://gerrit.cloudera.org:8080/6495 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: I08834f38a941786ab45a4381c2732d929a934f75 Gerrit-PatchSet: 3 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: Lars Volker <l...@cloudera.com> Gerrit-Reviewer: Dimitris Tsirogiannis <dtsirogian...@cloudera.com> Gerrit-Reviewer: Lars Volker <l...@cloudera.com> Gerrit-HasComments: Yes
