Package org.apache.flink.table.runtime.operators.join.stream.utils

Class JoinInputSideSpec

java.lang.Object
org.apache.flink.table.runtime.operators.join.stream.utils.JoinInputSideSpec
All Implemented Interfaces:
Serializable
public class JoinInputSideSpec extends Object implements Serializable
The JoinInputSideSpec is ap specification which describes input side information of a Join.
See Also:

  • Method Details

    • hasUniqueKey

      public boolean hasUniqueKey()
      Returns true if the input has unique key, otherwise false.

    • joinKeyContainsUniqueKey

      public boolean joinKeyContainsUniqueKey()
      Returns true if the join key contains the unique key of the input.

    • getUniqueKeyType

      @Nullable public InternalTypeInfo<org.apache.flink.table.data.RowData> getUniqueKeyType()
      Returns the TypeInformation of the unique key. Returns null if the input hasn't unique key.

    • getUniqueKeySelector

      @Nullable public org.apache.flink.api.java.functions.KeySelector<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData> getUniqueKeySelector()
      Returns the KeySelector to extract unique key from the input row. Returns null if the input hasn't unique key.

    • withUniqueKey

      public static JoinInputSideSpec withUniqueKey(InternalTypeInfo<org.apache.flink.table.data.RowData> uniqueKeyType, org.apache.flink.api.java.functions.KeySelector<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData> uniqueKeySelector)
      Creates a JoinInputSideSpec that the input has an unique key.
      Parameters:
      uniqueKeyType - type information of the unique key
      uniqueKeySelector - key selector to extract unique key from the input row

    • withUniqueKeyContainedByJoinKey

      public static JoinInputSideSpec withUniqueKeyContainedByJoinKey(InternalTypeInfo<org.apache.flink.table.data.RowData> uniqueKeyType, org.apache.flink.api.java.functions.KeySelector<org.apache.flink.table.data.RowData,org.apache.flink.table.data.RowData> uniqueKeySelector)
      Creates a JoinInputSideSpec that input has an unique key and the unique key is contained by the join key.
      Parameters:
      uniqueKeyType - type information of the unique key
      uniqueKeySelector - key selector to extract unique key from the input row

    • withoutUniqueKey

      public static JoinInputSideSpec withoutUniqueKey()
      Creates a JoinInputSideSpec that input hasn't any unique keys.

    • toString

      public String toString()
      Overrides:
      toString in class Object