org.apache.flink.api.java.record.functions

Annotation Type FunctionAnnotation.AllFieldsConstants

@Target(value=TYPE)
@Retention(value=RUNTIME)
public static @interface FunctionAnnotation.AllFieldsConstants

Specifies that all fields of an input record that are unchanged in the output of a MapFunction, or ReduceFunction). A field is considered to be constant if its value is not changed and copied to the same position of output record. It is very important to follow a conservative strategy when specifying constant fields. Only fields that are always constant (regardless of value, stub call, etc.) to the output may be inserted! Otherwise, the correct execution of a program can not be guaranteed. So if in doubt, do not add a field to this set. This annotation is mutually exclusive with the FunctionAnnotation.ConstantFieldsExcept annotation. If this annotation and the FunctionAnnotation.ConstantFieldsExcept annotation is not set, it is assumed that no field is constant.