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https://issues.apache.org/jira/browse/HIVE-1003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13140649#comment-13140649
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Hudson commented on HIVE-1003:
------------------------------
Integrated in Hive-trunk-h0.21 #1048 (See
[https://builds.apache.org/job/Hive-trunk-h0.21/1048/])
HIVE-1003: optimize metadata only queries (Marcin Kurczych, Namit Jain via
He Yongqiang)
heyongqiang :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1195577
Files :
* /hive/trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
*
/hive/trunk/jdbc/src/java/org/apache/hadoop/hive/jdbc/HiveDatabaseMetaData.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/ExecDriver.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/MapRedTask.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/MapredLocalTask.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/Task.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/OneNullRowInputFormat.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/MetadataOnlyOptimizer.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/physical/PhysicalOptimizer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/GroupByDesc.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/UDFType.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMax.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMin.java
* /hive/trunk/ql/src/test/queries/clientpositive/metadataonly1.q
* /hive/trunk/ql/src/test/results/clientpositive/metadataonly1.q.out
* /hive/trunk/serde/src/java/org/apache/hadoop/hive/serde2/NullStructSerDe.java
> optimize metadata only queries
> ------------------------------
>
> Key: HIVE-1003
> URL: https://issues.apache.org/jira/browse/HIVE-1003
> Project: Hive
> Issue Type: New Feature
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Marcin Kurczych
> Fix For: 0.9.0
>
> Attachments: D105.1.patch, HIVE-1003.1.patch, hive.1003.2.patch,
> hive.1003.3.patch, hive.1003.4.patch
>
>
> Queries like:
> select max(ds) from T
> where ds is a partitioning column should be optimized.
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