MDEV-12067 flashback does not correcly revert update/replace statementsbb-10.2-MDEV-12067

Problem
-------
For one-statement contains multiple row events, Flashback didn't reverse the
sequence of row events inside one-statement.

Solution
--------
Using a new array 'events_in_stmt' to store the row events of one-statement,
when parsed the last one event, then print from the last one to the first one.

In the same time, fixed another bug, without -vv will not insert the table_map
into print_event_info->m_table_map, then change_to_flashback_event() will not
execute because of Table_map_log_event is empty.

1 files changed, 2 insertions, 0 deletions

diff --git a/sql/log_event.h b/sql/log_event.h
index 6c6dce7e18e..a06781aebeb 100644
--- a/sql/log_event.h
+++ b/sql/log_event.h
@@ -4397,6 +4397,7 @@ public:
   void set_flags(flag_set flags_arg) { m_flags |= flags_arg; }
   void clear_flags(flag_set flags_arg) { m_flags &= ~flags_arg; }
   flag_set get_flags(flag_set flags_arg) const { return m_flags & flags_arg; }
+  void update_flags() { int2store(temp_buf + m_flags_pos, m_flags); }
 
   Log_event_type get_type_code() { return m_type; } /* Specific type (_V1 etc) */
   virtual Log_event_type get_general_type_code() = 0; /* General rows op type, no version */
@@ -4555,6 +4556,7 @@ protected:
   uchar    *m_rows_end;		/* One-after the end of the allocated space */
 
   size_t   m_rows_before_size;  /* The length before m_rows_buf */
+  size_t   m_flags_pos; /* The position of the m_flags */
 
   flag_set m_flags;		/* Flags for row-level events */