public void addFinalSelectOp(
        SelectOperator sop, Operator<? extends OperatorDesc> sinkOp) {
      String operatorId = sop.getOperatorId();
      if (!finalSelectOps.containsKey(operatorId)) {
        Table table = null;
        if (sinkOp instanceof FileSinkOperator) {
          FileSinkOperator fso = (FileSinkOperator) sinkOp;
          table = fso.getConf().getTable();
        }
        finalSelectOps.put(operatorId, Pair.of(sop, table));
      }
    }
Merges the new dependencies in dep to the existing dependencies
of (op, ci).

@param op The operator of the column whose dependency is being modified.
@param ci The column info of the associated column.
@param dep The new dependency.
ql/src/java/org/apache/hadoop/hive/ql/optimizer/lineage/LineageCtx.java