[jira] [Created] (TAJO-744) ALTER TABLE ADD/DROP PARTITION statement

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

Hyunsik Choi created TAJO-744:
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             Summary: ALTER TABLE ADD/DROP PARTITION statement
                 Key: TAJO-744
                 URL: https://issues.apache.org/jira/browse/TAJO-744
             Project: Tajo
          Issue Type: New Feature
          Components: catalog
    Affects Versions: 1.0-incubating
            Reporter: Hyunsik Choi
             Fix For: 1.0-incubating


Currently, Tajo does not manage partitioned directly. In Tajo, each partition is just a directory. For each query, a logical planner traverses matched directories in HDFS according to partition predicates.

This approach is not efficient especially in the environment where the number of partitions are very large. It also makes partition management hard.

Tajo should manage partitions directly by using ALTER TABLE ADD/DROP PARTITION statements. A number of partition entries should be stored in the underlying database that catalog uses.


{code:title=Synopsis of ALTER TABLE ADD/DROP PARTITION}
ALTER TABLE table_name [IF NOT EXISTS] ADD COLUMN PARTITION (key1 = 'val2', key2 = 'val2', ...) WITH ('prop_key' = 'prop_val', ...) LOCATION '...';

ALTER TABLE table_name [IF EXISTS] DROP COLUMN PARTITION  (key1 [=|<|<=|>|>=|!=] 'val1');
{code}



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