Class Join.LeftOuterJoin<K,V1,V2>

java.lang.Object
org.apache.beam.sdk.transforms.PTransform<PCollection<KV<K,V1>>,PCollection<KV<K,KV<V1,V2>>>>
org.apache.beam.sdk.extensions.joinlibrary.Join.LeftOuterJoin<K,V1,V2>
Type Parameters:
K - Type of the key for both collections
V1 - Type of the values for the left collection.
V2 - Type of the values for the right collection.
All Implemented Interfaces:
Serializable, HasDisplayData
Enclosing class:
Join

public static class Join.LeftOuterJoin<K,V1,V2> extends PTransform<PCollection<KV<K,V1>>,PCollection<KV<K,KV<V1,V2>>>>
PTransform representing a left outer join of two collections of KV elements.
See Also:
  • Method Details

    • with

      public static <K, V1, V2> Join.LeftOuterJoin<K,V1,V2> with(PCollection<KV<K,V2>> rightCollection, V2 nullValue)
    • expand

      public PCollection<KV<K,KV<V1,V2>>> expand(PCollection<KV<K,V1>> leftCollection)
      Description copied from class: PTransform
      Override this method to specify how this PTransform should be expanded on the given InputT.

      NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.

      Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).

      Specified by:
      expand in class PTransform<PCollection<KV<K,V1>>,PCollection<KV<K,KV<V1,V2>>>>