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From "Michael Malak (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-4771) Support subqueries in INSERT for array types
Date Thu, 20 Jun 2013 22:09:20 GMT
Michael Malak created HIVE-4771:
-----------------------------------

             Summary: Support subqueries in INSERT for array types
                 Key: HIVE-4771
                 URL: https://issues.apache.org/jira/browse/HIVE-4771
             Project: Hive
          Issue Type: Improvement
          Components: Query Processor
            Reporter: Michael Malak


Since Hive supports SQL1999-style array types for columns, it would be nice for there to be
a way to INSERT non-static data into such columns -- i.e. from another table based on a complex
query as opposed to loading from a static file, loading from hard-coded values within the
INSERT query, or copying complete arrays verbatim from another table.

An example can be found at:
http://www.postgresql.org/message-id/20041028232152.GA76168@winnie.fuhr.org

CREATE TABLE table_a(a int, b int, c int[]);

INSERT INTO table_a
  SELECT a, b, ARRAY(SELECT c FROM table_c WHERE table_c.parent = table_b.id)
  FROM table_b

This should be implemented after regular correlated and uncorrelated subqueries are implemented:

https://issues.apache.org/jira/browse/HIVE-784 "Support uncorrelated subqueries in the WHERE
clause"

https://issues.apache.org/jira/browse/HIVE-1799 "Support correlated subqueries in the WHERE
clause"


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