BeamQueryPlanner is the main interface.See: Description
| Class | Description | 
|---|---|
| BeamJavaTypeFactory | customized data type in Beam. | 
| BeamRelDataTypeSystem | customized data type in Beam. | 
| BeamRuleSets | RuleSetused inBeamQueryPlanner. | 
BeamQueryPlanner is the main interface. It defines data sources, validate a SQL
 statement, and convert it as a Beam pipeline.