Adjusting sql_command to align with higher version, this is an adjustment

to the patch for MDEV-17605

sql/sql_show.cc

@@ -4272,8 +4272,8 @@ fill_schema_table_by_open(THD *thd, bool is_show_fields_or_keys,
     SQLCOM_SHOW_FIELDS is used because it satisfies
     'only_view_structure()'.
   */
-  lex->sql_command= SQLCOM_SHOW_FIELDS;
   thd->force_read_stats= get_schema_table_idx(schema_table) == SCH_STATISTICS;
+  lex->sql_command= SQLCOM_SHOW_FIELDS;
   result= (open_temporary_tables(thd, table_list) ||
            open_normal_and_derived_tables(thd, table_list,
                                           (MYSQL_OPEN_IGNORE_FLUSH |
@@ -4281,16 +4281,15 @@ fill_schema_table_by_open(THD *thd, bool is_show_fields_or_keys,
                                            (can_deadlock ?
                                             MYSQL_OPEN_FAIL_ON_MDL_CONFLICT : 0)),
                                           DT_PREPARE | DT_CREATE));
-
-  (void) read_statistics_for_tables_if_needed(thd, table_list);
-  thd->force_read_stats= false;
-
   /*
     Restore old value of sql_command back as it is being looked at in
     process_table() function.
   */
   lex->sql_command= old_lex->sql_command;
 
+  (void) read_statistics_for_tables_if_needed(thd, table_list);
+  thd->force_read_stats= false;
+
   DEBUG_SYNC(thd, "after_open_table_ignore_flush");
 
   /*