Mike Percy has posted comments on this change. ( http://gerrit.cloudera.org:8080/10968 )
Change subject: schema: add is_deleted virtual column ...................................................................... Patch Set 5: (1 comment) http://gerrit.cloudera.org:8080/#/c/10968/3/src/kudu/common/schema.cc File src/kudu/common/schema.cc: http://gerrit.cloudera.org:8080/#/c/10968/3/src/kudu/common/schema.cc@142 PS3, Line 142: $$IS_DELETED$$ > Not really. Todd pointed me at the Postgres documentation (https://www.post It looks like Oracle calls them pseudocolumns: https://docs.oracle.com/cd/B19306_01/server.102/b14200/pseudocolumns.htm Postgres says if you quote the name in SQL you can access a conflicting column name. I guess this special syntax of $$...$$ is better than that, assuming it doesn't get mangled by Impala or Spark. -- To view, visit http://gerrit.cloudera.org:8080/10968 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: kudu Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I56eb1d44ba8bfbd76d8bb794b8076b695782939e Gerrit-Change-Number: 10968 Gerrit-PatchSet: 5 Gerrit-Owner: Adar Dembo <a...@cloudera.com> Gerrit-Reviewer: Adar Dembo <a...@cloudera.com> Gerrit-Reviewer: Grant Henke <granthe...@apache.org> Gerrit-Reviewer: Kudu Jenkins Gerrit-Reviewer: Mike Percy <mpe...@apache.org> Gerrit-Reviewer: Todd Lipcon <t...@apache.org> Gerrit-Comment-Date: Thu, 19 Jul 2018 22:26:34 +0000 Gerrit-HasComments: Yes
