| Class | Description | 
|---|---|
| ArrowColumnVector | 
 A column vector backed by Apache Arrow. 
 | 
| ColumnarArray | 
 Array abstraction in  
ColumnVector. | 
| ColumnarBatch | 
 This class wraps multiple ColumnVectors as a row-wise table. 
 | 
| ColumnarMap | 
 Map abstraction in  
ColumnVector. | 
| ColumnarRow | 
 Row abstraction in  
ColumnVector. | 
| ColumnVector | 
 An interface representing in-memory columnar data in Spark. 
 |