Sambavi Muthukrishnan created HIVE-3610:
-------------------------------------------
Summary: Add a command "Explain dependency ..."
Key: HIVE-3610
URL: https://issues.apache.org/jira/browse/HIVE-3610
Project: Hive
Issue Type: New Feature
Components: Query Processor
Affects Versions: 0.9.0
Reporter: Sambavi Muthukrishnan
Assignee: Sambavi Muthukrishnan
Priority: Minor
Add a new command "EXPLAIN DEPENDENCY".
Any query can be passed to EXPLAIN DEPENDENCY as with EXPLAIN
(FORMATTED/EXTENDED). The output of this command will be JSON that provides the
list of tables and partitions that the query depends on.
One possible use case is to determine the set of tables/views that are used by
a view, and the set of partitions that are used by a given query on that view.
This will allow a view to be replicated from one Hive instance to another,
since we can determine the set of objects that need to be replicated for
replication of the view to be successful.
Example output:
{"input_tables":[{"tablename": "default@test_sambavi_v2", "tabletype":
"EXTERNAL_TABLE"}, {"tablename": "default@test_sambavi_v1", "tabletype":
"TABLE"}], "input
partitions":["default@srcpart@ds=2008-04-08/hr=11","default@srcpart@ds=2008-04-08/hr=12"]}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
