public static class Join.Impl<LhsT,RhsT> extends PTransform<PCollection<LhsT>,PCollection<Row>>
name
Modifier and Type | Method and Description |
---|---|
PCollection<Row> |
expand(PCollection lhs)
Override this method to specify how this
PTransform should be expanded on the given
InputT . |
Join.Impl<LhsT,RhsT> |
on(Join.FieldsEqual.Impl predicate)
Join the PCollections using the provided predicate.
|
Join.Impl<LhsT,RhsT> |
using(FieldAccessDescriptor fieldAccessDescriptor)
Perform a natural join between the PCollections.
|
Join.Impl<LhsT,RhsT> |
using(java.lang.Integer... fieldIds)
Perform a natural join between the PCollections.
|
Join.Impl<LhsT,RhsT> |
using(java.lang.String... fieldNames)
Perform a natural join between the PCollections.
|
compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, populateDisplayData, toString, validate
public Join.Impl<LhsT,RhsT> using(java.lang.String... fieldNames)
public Join.Impl<LhsT,RhsT> using(java.lang.Integer... fieldIds)
public Join.Impl<LhsT,RhsT> using(FieldAccessDescriptor fieldAccessDescriptor)
public Join.Impl<LhsT,RhsT> on(Join.FieldsEqual.Impl predicate)
public PCollection<Row> expand(PCollection lhs)
PTransform
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).
expand
in class PTransform<PCollection<LhsT>,PCollection<Row>>