[jira] [Created] (HIVE-25463) Add support to standalone Hive metastore for bulk dropping partitions out of the box

["Chinmay Kulkarni (Jira)" <ji...@apache.org>]

Chinmay Kulkarni created HIVE-25463:
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             Summary: Add support to standalone Hive metastore for bulk dropping partitions out of the box
                 Key: HIVE-25463
                 URL: https://issues.apache.org/jira/browse/HIVE-25463
             Project: Hive
          Issue Type: Improvement
          Components: Standalone Metastore
    Affects Versions: 3.1.2
            Reporter: Chinmay Kulkarni


Today for setups that use standalone metastore, we set the following:

{noformat}
<property>
  <name>metastore.expression.proxy</name>
  <value>org.apache.hadoop.hive.metastore.DefaultPartitionExpressionProxy</value>
</property>
{noformat}
However, [DefaultPartitionExpressionProxy|https://github.com/apache/hive/blob/d61c9160ffa5afbd729887c3db690eccd7ef8238/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/DefaultPartitionExpressionProxy.java] throws UnsupportedOperationException throughout, thus preventing any partition pruning to be successful. 

The effect of this is, other projects that rely on just standalone Hive Metastore (for example Trino) are unable to do things like invoke bulk partition drops using say, [HiveMetaStore.drop_partitions_req|https://github.com/apache/hive/blob/d61c9160ffa5afbd729887c3db690eccd7ef8238/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java#L5008] via a Thrift client.

We should implement a separate PartitionExpressionProxy implementation for such clients for use with standalone HMS. Note that an implementation like PartitionExpressionForMetastore cannot be used in such cases since standalone HMS installs will/should not have hive-exec dependencies.




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