SQL: fractions in I_S TIMESTAMP fields

sql/item.h

@@ -3622,10 +3622,10 @@ class Item_return_date_time :public Item_partition_func_safe_string
   enum_field_types date_time_field_type;
 public:
   Item_return_date_time(THD *thd, const char *name_arg, uint length_arg,
-                        enum_field_types field_type_arg):
+                        enum_field_types field_type_arg, uint dec_arg= 0):
     Item_partition_func_safe_string(thd, name_arg, length_arg, &my_charset_bin),
     date_time_field_type(field_type_arg)
-  { decimals= 0; }
+  { decimals= dec_arg; }
   enum_field_types field_type() const { return date_time_field_type; }
 };
 

sql/sql_show.cc

@@ -7730,7 +7730,8 @@ TABLE *create_schema_table(THD *thd, TABLE_LIST *table_list)
       if (!(item=new (mem_root)
             Item_return_date_time(thd, fields_info->field_name,
                                   strlen(fields_info->field_name),
-                                  fields_info->field_type)))
+                                  fields_info->field_type,
+                                  fields_info->field_length)))
         DBUG_RETURN(0);
       item->decimals= fields_info->field_length;
       break;