See: Description
| Class | Description | 
|---|---|
| BaseBeamTable | Each IO in Beam has one table schema, by extending  BaseBeamTable. | 
| BeamPCollectionTable<InputT> | BeamPCollectionTableconverts aPCollection<Row>as a virtual table, then a
 downstream query can query directly. | 
| BeamTableUtils | Utility methods for working with  BeamTable. |