[jira] [Created] (HIVE-12158) Add methods to HCatClient for partition synchronization

["David Maughan (JIRA)" <ji...@apache.org>]

David Maughan created HIVE-12158:
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             Summary: Add methods to HCatClient for partition synchronization
                 Key: HIVE-12158
                 URL: https://issues.apache.org/jira/browse/HIVE-12158
             Project: Hive
          Issue Type: Improvement
          Components: HCatalog
            Reporter: David Maughan
            Priority: Minor


We have a use case where we have a list of partitions that are created as a result of a batch job (new or updated) outside of Hive and would like to synchronize them with the Hive MetaStore. We would like to use the HCatalog {{HCatClient}} but it currently does not seem to support this. However it is possible with the {{HiveMetaStoreClient}} directly. I am proposing to add the following methods to {{HCatClient}} and {{HCatClientHMSImpl}}:

1. A method for altering partitions. The implementation would delegate to {{HiveMetaStoreClient#alter_partitions}}. I've used "update" instead of "alter" in the name so it's consistent with the {{HCatClient#updateTableSchema}} method.

{code}
public void updatePartitions(List<HCatPartition> partitions) throws HCatException
{code}

2. A method for altering or adding partitions depending on whether they already exist or not. The implementation would split the given list into a list of existing partitions (using {{HiveMetaStoreClient#getPartitionsByNames}} and {{Warehouse#makePartName}} to determine existence), and a list of new partitions. Then the appropriate add/update calls would be issued:

{code}
public void addOrUpdatePartitions(List<HCatPartition> partitions) throws HCatException
{code}

Are these acceptable? Are there any standards that should be followed here?



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