[jira] [Created] (HIVE-9780) Add another level of explain for RDBMS audience

["Pengcheng Xiong (JIRA)" <ji...@apache.org>]

Pengcheng Xiong created HIVE-9780:
-------------------------------------

             Summary: Add another level of explain for RDBMS audience
                 Key: HIVE-9780
                 URL: https://issues.apache.org/jira/browse/HIVE-9780
             Project: Hive
          Issue Type: Improvement
            Reporter: Pengcheng Xiong
            Assignee: Pengcheng Xiong
            Priority: Minor


Current Hive Explain (default) is targeted at MR Audience. We need a new level of explain plan to be targeted at RDBMS audience. The explain requires these:
1) The focus needs to be on what part of the query is being executed rather than internals of the engines
2) There needs to be a clearly readable tree of operations
3) Examples - Table scan should mention the table being scanned, the Sarg, the size of table and expected cardinality after the Sarg'ed read. The join should mention the table being joined with and the join condition. The aggregate should mention the columns in the group-by. 



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)