remove unused THD::query_start_used

sql/sql_class.cc

@@ -803,7 +803,7 @@ THD::THD(my_thread_id id, bool is_wsrep_applier, bool skip_global_sys_var_lock)
   security_ctx= &main_security_ctx;
   no_errors= 0;
   password= 0;
-  query_start_used= query_start_sec_part_used= 0;
+  query_start_sec_part_used= 0;
   count_cuted_fields= CHECK_FIELD_IGNORE;
   killed= NOT_KILLED;
   killed_err= 0;

sql/sql_class.h

@@ -3116,7 +3116,7 @@ class THD :public Statement,
     Reset to FALSE when we leave the sub-statement mode.
   */
   bool       is_fatal_sub_stmt_error;
-  bool	     query_start_used, rand_used, time_zone_used;
+  bool	     rand_used, time_zone_used;
   bool       query_start_sec_part_used;
   /* for IS NULL => = last_insert_id() fix in remove_eq_conds() */
   bool       substitute_null_with_insert_id;
@@ -3429,7 +3429,7 @@ class THD :public Statement,
   const Type_handler *type_handler_for_date() const;
   bool timestamp_to_TIME(MYSQL_TIME *ltime, my_time_t ts,
                          ulong sec_part, ulonglong fuzzydate);
-  inline my_time_t query_start() { query_start_used=1; return start_time; }
+  inline my_time_t query_start() { return start_time; }
   inline ulong query_start_sec_part()
   { query_start_sec_part_used=1; return start_time_sec_part; }
   MYSQL_TIME query_start_TIME();
@@ -3441,7 +3441,7 @@ class THD :public Statement,
   } system_time;
 
   ulong systime_sec_part() { query_start_sec_part_used=1; return system_time.sec_part; }
-  my_time_t systime() { query_start_used=1; return system_time.sec; }
+  my_time_t systime() { return system_time.sec; }
 
 private:
   void set_system_time()

sql/sql_insert.cc

@@ -2095,7 +2095,7 @@ class delayed_row :public ilink {
   ulong start_time_sec_part;
   sql_mode_t sql_mode;
   bool auto_increment_field_not_null;
-  bool query_start_used, ignore, log_query, query_start_sec_part_used;
+  bool ignore, log_query, query_start_sec_part_used;
   bool stmt_depends_on_first_successful_insert_id_in_prev_stmt;
   ulonglong first_successful_insert_id_in_prev_stmt;
   ulonglong forced_insert_id;
@@ -2706,7 +2706,6 @@ int write_delayed(THD *thd, TABLE *table, enum_duplicates duplic,
     goto err;
   memcpy(row->record, table->record[0], table->s->reclength);
   row->start_time=                thd->start_time;
-  row->query_start_used=          thd->query_start_used;
   row->start_time_sec_part=       thd->start_time_sec_part;
   row->query_start_sec_part_used= thd->query_start_sec_part_used;
   /*
@@ -3294,7 +3293,6 @@ bool Delayed_insert::handle_inserts(void)
       set_delayed_insert_blobs(table);
 
     thd.start_time=row->start_time;
-    thd.query_start_used=row->query_start_used;
     thd.start_time_sec_part=row->start_time_sec_part;
     thd.query_start_sec_part_used=row->query_start_sec_part_used;
     /*

sql/sql_parse.cc

@@ -7578,7 +7578,6 @@ void THD::reset_for_next_command(bool do_clear_error)
       global_system_variables.auto_increment_increment;
   }
 #endif /* WITH_WSREP */
-  query_start_used= 0;
   query_start_sec_part_used= 0;
   is_fatal_error= time_zone_used= 0;
   log_current_statement= 0;