Michael Malak created HIVE-4771:
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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.ga76...@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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