patch 4.0

src/sql/ob_sql_trans_util.h

@@ -16,120 +16,46 @@
 #include "share/ob_define.h"
 #include "sql/ob_sql_define.h"
 #include "lib/utility/ob_unify_serialize.h"
-#include "storage/transaction/ob_trans_define.h"
-namespace oceanbase {
-namespace sql {
+
+namespace oceanbase
+{
+namespace sql
+{
 class ObSQLSessionInfo;
-class TransResult {
-  OB_UNIS_VERSION(1);
-
+class ObSqlTransUtil
+{
 public:
-  TransResult() : is_incomplete_(false), lock_(), max_sql_no_(0), trans_desc_(NULL)
-  {}
-
-  void reset();
-  const common::ObPartitionArray& get_total_partitions()
-  {
-    return total_partitions_;
-  }
-  const common::ObPartitionArray& get_response_partitions()
-  {
-    return response_partitions_;
-  }
-  const transaction::ObPartitionEpochArray& get_part_epoch_list()
-  {
-    return part_epoch_list_;
-  }
-  int merge_result(const TransResult& other);
-  int merge_total_partitions(const common::ObPartitionArray& partitions);
-  int merge_response_partitions(const common::ObPartitionArray& partitions);
-  int merge_part_epoch_list(const transaction::ObPartitionEpochArray& part_epoch_list);
-  void set_incomplete()
-  {
-    is_incomplete_ = true;
-  }
-  bool is_incomplete() const
-  {
-    return is_incomplete_;
-  }
-  int set_max_sql_no(int64_t sql_no);
-  int64_t get_max_sql_no() const
-  {
-    return max_sql_no_;
-  }
-  void set_trans_desc(transaction::ObTransDesc* trans_desc)
-  {
-    trans_desc_ = trans_desc;
-  }
-  int assign(const TransResult& other);
-  void clear_stmt_result();
-  TO_STRING_KV(K_(total_partitions), K_(part_epoch_list), K_(response_partitions), K_(max_sql_no));
-
-private:
-  // collect all partitions for foreign key.
-  common::ObPartitionArray total_partitions_;
-  // discard_partitions_ indicates that the transaction in the partition is enabled,
-  // but the data of partition is not read or written
-  // record the partition info of the task that was actually executed
-  // response_partitions_ indicates that the partition must be read or written
-  // response_partitions_ + discard_partitions_ record the partition info of the task that
-  // has been start_participants
-  common::ObPartitionArray response_partitions_;
-  // part_epoch_list_ record the epoch id of response_partitions_
-  // when start_participants executed in the leader replica
-  transaction::ObPartitionEpochArray part_epoch_list_;
-  // indicate the partitions array is complete or not.
-  bool is_incomplete_;
-  common::ObSpinLock lock_;
-
-  // The transaction layer requires max_sql_no to increase monotonically,
-  // so it is transmitted across nodes with the help of the sql layer TransResult mechanism.
-  // But the transaction layer needs to pass from the remote TransDesc object to the local TransDesc object,
-  // and the existing mechanism of sql can only be from
-  // The remote TransResult object is passed to the local TransResult object,
-  // so here is a new TransDesc object
-  // Pointer to facilitate access to the TransDesc object during transmission.
-  // ps: This pointer is not set for all TransResult objects,
-  // such as the two objects of the scheduling thread
-  // Not in the same session object, it is not convenient to set.
-  int64_t max_sql_no_;
-  transaction::ObTransDesc* trans_desc_;
-};
-
-class ObSqlTransUtil {
-public:
-  /* Determine whether a statement should start a transaction remotely */
+  /* 判断一个语句是否应该在远程开启事务 */
   static bool is_remote_trans(bool ac, bool in_trans, ObPhyPlanType ptype)
   {
     return true == ac && false == in_trans && OB_PHY_PLAN_REMOTE == ptype;
   }
 
-  /* Determine whether the transaction can be automatically opened */
+  /* 判断是否能够自动开启事务 */
   static bool plan_can_start_trans(bool ac, bool in_trans)
   {
     UNUSED(ac);
     return false == in_trans;
   }
 
-  /* Determine whether the current transaction can be automatically ended */
-  static bool plan_can_end_trans(bool ac, bool in_trans)
+  /* 判断是否能够自动结束当前事务 */
+  static bool plan_can_end_trans(bool ac, bool explicit_start_trans)
   {
-    return false == in_trans && true == ac;
+    return false == explicit_start_trans && true == ac;
   }
 
-  /* Determine whether cmd can automatically end the previous transaction */
+  /* 判断cmd是否能够自动结束上一个事务 */
   static bool cmd_need_new_trans(bool ac, bool in_trans)
   {
     UNUSED(ac);
     return true == in_trans;
   }
-
 private:
-  ObSqlTransUtil(){};
-  ~ObSqlTransUtil(){};
+  ObSqlTransUtil() {};
+  ~ObSqlTransUtil() {};
   DISALLOW_COPY_AND_ASSIGN(ObSqlTransUtil);
 };
-}  // namespace sql
-}  // namespace oceanbase
+}
+}
 #endif /* OCEANBASE_SQL_TRANS_UTIL_ */
 //// end of header file