protected JoinUtil.JoinResult inverseResultForAntiJoin(JoinUtil.JoinResult joinResult) {
    if (joinResult == JoinUtil.JoinResult.NOMATCH) {
      return JoinUtil.JoinResult.MATCH;
    } else if (joinResult == JoinUtil.JoinResult.MATCH) {
      return JoinUtil.JoinResult.NOMATCH;
    }
    return joinResult;
  }
Generate the matching anti join output results of a vectorized row batch.

@param batch
         The big table batch.
@param allMatches
         A subset of the rows of the batch that are matches.
@param allMatchCount
         Number of matches in allMatches.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/mapjoin/VectorMapJoinAntiJoinGenerateResultOperator.java