org.apache.flink.table.data

接口 MapData

所有已知实现类:

BinaryMapData, GenericMapData

@PublicEvolving
public interface MapData

Base interface of an internal data structure representing data of MapType or MultisetType.

Note: All keys and values of this data structure must be internal data structures. All keys must be of the same type; same for values. See RowData for more information about internal data structures.

Use GenericMapData to construct instances of this interface from regular Java maps.

方法概要

限定符和类型	方法和说明
ArrayData	keyArray() Returns an array view of the keys contained in this map.
int	size() Returns the number of key-value mappings in this map.
ArrayData	valueArray() Returns an array view of the values contained in this map.

方法详细资料

size

int size()

Returns the number of key-value mappings in this map.

keyArray

ArrayData keyArray()

Returns an array view of the keys contained in this map.

A key-value pair has the same index in the key array and value array.

valueArray

ArrayData valueArray()

Returns an array view of the values contained in this map.

A key-value pair has the same index in the key array and value array.