@Override
  public List queryEquijoinCondition(IndexProtocol index, ExecutionContext context)
      throws TypeMismatchException, FunctionDomainException, NameResolutionException,
      QueryInvocationTargetException {

    Support.assertionFailed(
        " This function should have never got invoked as its meaningful implementation is present only in RangeIndex class");
    return null;
  }
Returns the unique name of this index
geode-core/src/main/java/org/apache/geode/cache/query/internal/index/AbstractIndex.java