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Posted to issues@tajo.apache.org by "Hyunsik Choi (JIRA)" <ji...@apache.org> on 2014/12/17 04:59:13 UTC

[jira] [Created] (TAJO-1253) Catalog API should be queryable

Hyunsik Choi created TAJO-1253:
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             Summary: Catalog API should be queryable
                 Key: TAJO-1253
                 URL: https://issues.apache.org/jira/browse/TAJO-1253
             Project: Tajo
          Issue Type: New Feature
          Components: catalog
            Reporter: Hyunsik Choi


TAJO-1176 is trying to add queryable catalog information. But, currently Catalog API is not quryable. In other words, Catalog retrieves all tables, and all tablespaces, and all functions. It is not scalable.

It would be great if Catalog API takes some conditions like {{table_name LIKE 'T%'}} or {{table_name = 'orders'}}. This approach can be adopted to functions, tables, columns, tablespaces, and partitions.

We already use RDBMS as catalog persistent storages. All RDBMSs provides abundant features, including indexing features. They allow very efficient implementations



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