Enhancing local mode execution with non-HDFS related queries
-------------------------------------------------------------
Key: HIVE-2324
URL: https://issues.apache.org/jira/browse/HIVE-2324
Project: Hive
Issue Type: New Feature
Reporter: Ning Zhang
Local mode execution are decided based on the input size. There are queries
that do not involve data resides in HDFS at all. We should enhance local mode
execution with these types of queries:
1) metadata only queries. eg.,
{code}
SELECT max(ds) From T WHERE ts = 'some_partition'; -- both ds and ts are
partition columns
{code}
2) DUAL table (HIVE-1558):
{code}
SELECT MYUDF('constant1', 'constant2') FROM DUAL;
SELECT MYUDAF(...) FROM ( SELECT 'const1' col1, 'const2' col2 FROM DUAL ) A
GROUP BY col1;
{code}
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
