LookupTableSource.LookupContext (Flink : 2.0-SNAPSHOT API)

All Superinterfaces:

DynamicTableSource.Context

All Known Implementing Classes:

LookupRuntimeProviderContext

Enclosing interface:

LookupTableSource
```
@PublicEvolving
public static interface LookupTableSource.LookupContext
extends DynamicTableSource.Context
```
Context for creating runtime implementation via a LookupTableSource.LookupRuntimeProvider.
It offers utilities by the planner for creating runtime implementation with minimal dependencies to internal data structures.
Methods should be called in LookupTableSource.getLookupRuntimeProvider(LookupContext). Returned instances that are Serializable can be directly passed into the runtime implementation class.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  int[][] getKeys()
  Returns an array of key index paths that should be used during the lookup.
  - Methods inherited from interface org.apache.flink.table.connector.source.DynamicTableSource.Context
    createDataStructureConverter, createTypeInformation, createTypeInformation

- Method Detail
  - getKeys
```
int[][] getKeys()
```
    Returns an array of key index paths that should be used during the lookup. The indices are 0-based and support composite keys within (possibly nested) structures.
    For example, given a table with data type ROW < i INT, s STRING, r ROW < i2 INT, s2 STRING > >, this method would return [[0], [2, 1]] when i and s2 are used for performing a lookup.
    
    Returns:
    
    array of key index paths