MDEV-4506: Parallel replication: Intermediate commit.

Move annotate-event stuff from Relay_log_info to rpl_group_info,
to make it thread safe.

sql/rpl_rli.cc

@@ -61,8 +61,7 @@ Relay_log_info::Relay_log_info(bool is_slave_recovery)
    until_log_pos(0), retried_trans(0), executed_entries(0),
    tables_to_lock(0), tables_to_lock_count(0),
    last_event_start_time(0), m_flags(0),
-   row_stmt_start_timestamp(0), long_find_row_note_printed(false),
-   m_annotate_event(0)
+   row_stmt_start_timestamp(0), long_find_row_note_printed(false)
 {
   DBUG_ENTER("Relay_log_info::Relay_log_info");
 
@@ -112,7 +111,6 @@ Relay_log_info::~Relay_log_info()
   mysql_cond_destroy(&log_space_cond);
   mysql_cond_destroy(&sleep_cond);
   relay_log.cleanup();
-  free_annotate_event();
   DBUG_VOID_RETURN;
 }
 
@@ -1536,12 +1534,18 @@ end:
 rpl_group_info::rpl_group_info(Relay_log_info *rli_)
   : rli(rli_), thd(0), gtid_sub_id(0), wait_commit_sub_id(0),
     wait_commit_group_info(0), wait_start_sub_id(0), parallel_entry(0),
-    deferred_events(NULL)
+    deferred_events(NULL), m_annotate_event(0)
 {
   bzero(&current_gtid, sizeof(current_gtid));
 }
 
 
+rpl_group_info::~rpl_group_info()
+{
+  free_annotate_event();
+}
+
+
 int
 event_group_new_gtid(rpl_group_info *rgi, Gtid_log_event *gev)
 {
@@ -1583,7 +1587,7 @@ delete_or_keep_event_post_apply(rpl_group_info *rgi,
       The thd->query will be used to generate new Annotate_rows event
       during applying the subsequent Rows events.
     */
-    rgi->rli->set_annotate_event((Annotate_rows_log_event*) ev);
+    rgi->set_annotate_event((Annotate_rows_log_event*) ev);
     break;
   case DELETE_ROWS_EVENT:
   case UPDATE_ROWS_EVENT:
@@ -1593,7 +1597,7 @@ delete_or_keep_event_post_apply(rpl_group_info *rgi,
       event (if any) is not needed anymore and can be deleted.
     */
     if (((Rows_log_event*)ev)->get_flags(Rows_log_event::STMT_END_F))
-      rgi->rli->free_annotate_event();
+      rgi->free_annotate_event();
     /* fall through */
   default:
     DBUG_PRINT("info", ("Deleting the event after it has been executed"));

sql/rpl_rli.h

@@ -472,43 +472,6 @@ public:
       (m_flags & (1UL << IN_STMT));
   }
 
-  /**
-    Save pointer to Annotate_rows event and switch on the
-    binlog_annotate_row_events for this sql thread.
-    To be called when sql thread recieves an Annotate_rows event.
-  */
-  inline void set_annotate_event(Annotate_rows_log_event *event)
-  {
-    free_annotate_event();
-    m_annotate_event= event;
-    sql_thd->variables.binlog_annotate_row_events= 1;
-  }
-
-  /**
-    Returns pointer to the saved Annotate_rows event or NULL if there is
-    no saved event.
-  */
-  inline Annotate_rows_log_event* get_annotate_event()
-  {
-    return m_annotate_event;
-  }
-
-  /**
-    Delete saved Annotate_rows event (if any) and switch off the
-    binlog_annotate_row_events for this sql thread.
-    To be called when sql thread has applied the last (i.e. with
-    STMT_END_F flag) rbr event.
-  */
-  inline void free_annotate_event()
-  {
-    if (m_annotate_event)
-    {
-      sql_thd->variables.binlog_annotate_row_events= 0;
-      delete m_annotate_event;
-      m_annotate_event= 0;
-    }
-  }
-
   time_t get_row_stmt_start_timestamp()
   {
     return row_stmt_start_timestamp;
@@ -553,8 +516,6 @@ private:
    */
   time_t row_stmt_start_timestamp;
   bool long_find_row_note_printed;
-
-  Annotate_rows_log_event *m_annotate_event;
 };
 
 
@@ -607,9 +568,6 @@ struct rpl_group_info
 
   struct rpl_parallel_entry *parallel_entry;
 
-  rpl_group_info(Relay_log_info *rli_);
-  ~rpl_group_info() { };
-
   /*
     A container to hold on Intvar-, Rand-, Uservar- log-events in case
     the slave is configured with table filtering rules.
@@ -624,6 +582,11 @@ struct rpl_group_info
   */
   bool deferred_events_collecting;
 
+  Annotate_rows_log_event *m_annotate_event;
+
+  rpl_group_info(Relay_log_info *rli_);
+  ~rpl_group_info();
+
   /* 
      Returns true if the argument event resides in the containter;
      more specifically, the checking is done against the last added event.
@@ -644,6 +607,44 @@ struct rpl_group_info
     if (deferred_events)
       delete deferred_events;
   };
+
+  /**
+    Save pointer to Annotate_rows event and switch on the
+    binlog_annotate_row_events for this sql thread.
+    To be called when sql thread recieves an Annotate_rows event.
+  */
+  inline void set_annotate_event(Annotate_rows_log_event *event)
+  {
+    free_annotate_event();
+    m_annotate_event= event;
+    this->thd->variables.binlog_annotate_row_events= 1;
+  }
+
+  /**
+    Returns pointer to the saved Annotate_rows event or NULL if there is
+    no saved event.
+  */
+  inline Annotate_rows_log_event* get_annotate_event()
+  {
+    return m_annotate_event;
+  }
+
+  /**
+    Delete saved Annotate_rows event (if any) and switch off the
+    binlog_annotate_row_events for this sql thread.
+    To be called when sql thread has applied the last (i.e. with
+    STMT_END_F flag) rbr event.
+  */
+  inline void free_annotate_event()
+  {
+    if (m_annotate_event)
+    {
+      this->thd->variables.binlog_annotate_row_events= 0;
+      delete m_annotate_event;
+      m_annotate_event= 0;
+    }
+  }
+
 };