PartitionableTableSource (Flink : Table : Common 2.0-preview1 API)

```
@Deprecated
@Internal
public interface PartitionableTableSource
```
Deprecated.
This interface will not be supported in the new source design around DynamicTableSource. Use SupportsPartitionPushDown instead. See FLIP-95 for more information.

An interface for partitionable TableSource.
A PartitionableTableSource can exclude partitions from reading, which includes skipping the metadata. This is especially useful when there are thousands of partitions in a table.
A partition is represented as a Map<String, String> which maps from partition field name to partition value. Since the map is NOT ordered, the correct order of partition fields should be obtained via partition keys of catalog table.

Method Summary

All Methods Instance Methods Abstract Methods Deprecated Methods
Modifier and Type	Method	Description
`TableSource`	`applyPartitionPruning(List<Map<String,String>> remainingPartitions)`	Deprecated. Applies the remaining partitions to the table source.
`List<Map<String,String>>`	`getPartitions()`	Deprecated. Returns all the partitions of this `PartitionableTableSource`.

- Method Detail
  - getPartitions
```
List<Map<String,String>> getPartitions()
```
    Deprecated.
    
    Returns all the partitions of this PartitionableTableSource.
  - applyPartitionPruning
```
TableSource applyPartitionPruning(List<Map<String,String>> remainingPartitions)
```
    Deprecated.
    
    Applies the remaining partitions to the table source. The remainingPartitions is the remaining partitions of getPartitions() after partition pruning applied.
    After trying to apply partition pruning, we should return a new TableSource instance which holds all pruned-partitions.
    
    Parameters:
    
    remainingPartitions - Remaining partitions after partition pruning applied.
    
    Returns:
    
    A new cloned instance of TableSource holds all pruned-partitions.