Main Functions¶

Data Federation supports data reading and writing, data querying, and data downloading from multi-source heterogeneous data storage systems. The main functions of Data Federation is shown in the following figure.

Reading and Writing Data¶

After authorizing created data federation channels to specific applications, users can read data from or write data to data sources through the channels by Open APIs, JDBC, or OData.

Querying Data Online¶

Data Federation service provides visual interface to enable developers to query data from various data sources for debugging and analysis.

Support for single-source query: Querying data from Hive or MySQL data source with native SQL of the data source.
Support for multiple-source query: Querying data from one or more sources with unified SQL (ANSI/SQL2003).

Downloading Data¶

Data Federation service provides visual interface to enable developer to download data from data sources through authorized channels.