Merge branch 'tianyu-protocol-refactor-structure' of https://github.com/tli2/peloton into tianyu-protocol-refactor-structure

Author: tli2

src/include/network/network_io_utils.h

@@ -83,12 +83,6 @@ class Buffer {
     size_ = unprocessed_len;
     offset_ = 0;
   }
-//
-//  void PrintBuffer(int offset, int len) {
-//    for (int i = offset; i < offset + len; i++)
-//      printf("%02X ", buf_[i]);
-//    printf("\n");
-//  }
 
  protected:
   size_t size_ = 0, offset_ = 0, capacity_;

src/include/traffic_cop/tcop.h

@@ -43,7 +43,7 @@ struct ClientProcessState {
   // flag of single statement txn
   std::vector<ResultValue> result_;
   std::stack<TcopTxnState> tcop_txn_state_;
-  NetworkTransactionStateType txn_state_ = NetworkTransactionStateType::INVALID;
+  NetworkTransactionStateType txn_state_ = NetworkTransactionStateType::IDLE;
   bool skipped_stmt_ = false;
   std::string skipped_query_string_;
   QueryType skipped_query_type_ = QueryType::QUERY_INVALID;
@@ -74,7 +74,7 @@ struct ClientProcessState {
     result_format_.clear();
     result_.clear();
     tcop_txn_state_ = std::stack<TcopTxnState>();
-    txn_state_ = NetworkTransactionStateType::INVALID;
+    txn_state_ = NetworkTransactionStateType::IDLE;
     skipped_stmt_ = false;
     skipped_query_string_ = "";
     skipped_query_type_ = QueryType::QUERY_INVALID;