[TAJO-1253] Catalog API should be queryable

• Type: New Feature
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Catalog
• Assignee: Jihun Kang
• Reporter: Hyunsik Choi
• Created: 17/Dec/14 03:58
• Updated: 03/Apr/15 09:53

Description

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

Issue Links

• is related to: TAJO-1176 Implements queryable virtual tables for catalog information
• relates to: TAJO-744 (Umbrella) ALTER TABLE ADD/DROP PARTITION statement

Sub-Tasks

• Implements Predicates API: Open
• Refactor Catalog API to handle a new predicate builder and context: Open