@Override
    public String toString() {
      return "cacheKey:" + mjSmallTableCacheKey + ", bigKeyColName:" + mjBigTableKeyColName +
          ", smallTablePos:" + mjSmallTablePos + ", keyRatio:" + keyRatio;
    }
Inner wrapper class for TS ProbeDecode optimization
ql/src/java/org/apache/hadoop/hive/ql/exec/TableScanOperator.java