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Posted to issues@kylin.apache.org by "youcheng.zhang (JIRA)" <ji...@apache.org> on 2018/09/11 07:00:00 UTC

[jira] [Created] (KYLIN-3552) Provide a sdk to support different data sources

youcheng.zhang created KYLIN-3552:
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             Summary: Provide a sdk to support different data sources
                 Key: KYLIN-3552
                 URL: https://issues.apache.org/jira/browse/KYLIN-3552
             Project: Kylin
          Issue Type: New Feature
          Components: Query Engine, RDBMS Source
            Reporter: youcheng.zhang
             Fix For: v2.6.0


Kylin already supports JDBC source, but it takes much efforts to develop an implementation to a new source engine, like supporting metadata sync, cube build and query pushdown. It’s mainly because the SQL dialects and jdbc implementations between source engines are quite different.

We propose to develop a data source sdk, which provides APIs to help developers handle these dialect differences and easily implement an adaptor for one source engine. With this SDK, users can achieve followings from a JDBC source:
 # synchronize metadata and data from jdbc source.
 # Build cube from jdbc source.
 # query pushdown to jdbc source engine when cube is unmatched. 

The SDK will define some interfaces of adaptors. To implement a new source, developers only need to implement an adaptor for the source.

To keep compatibly, we will keep the existing JDBC sources, and implement a new JDBC source as the caller of the SDK. Besides, we will also provide a pushdown implementation class as the caller of SDK for pushdown scenarios.



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