message: Commit out debug code.
diff: @@ -119,8 +119,11 @@ void CommonAggregateOptimizer::find_bound_references(Expression& expression, con
  }
  void CommonAggregateOptimizer::ExtractCommonAggregateExpressions(LogicalOperator& projection) {
  + /* REMOVE CODE AFTER DEBUGGING
  std::cout << "BEFORE OPTIMIZING:" << std::endl;
  std::cout << projection.ToString() << std::endl;
  + ** REMOVE CODE AFTER DEBUGGING
  + */
  vector<Expression*> operator_chain_expressions;
  @@ -156,8 +159,10 @@ void CommonAggregateOptimizer::ExtractCommonAggregateExpressions(LogicalOperator
  aggregate_index++;
  }
  -
  + /* REMOVE CODE AFTER DEBUGGING
  aggregate->expressions.swap(new_aggregate_expressions);
  std::cout << "AFTER OPTIMIZING:" << std::endl;
  std::cout << projection.ToString() << std::endl;
  + ** REMOVE CODE AFTER DEBUGGING
  + */
  }
  