Hi Alexey,

What does the code quoted below do? I don't recall seeing it on previous review
iterations.

In any case,
* It needs a comment about why such special handling is needed.
* It needs test coverage - I have reverted these changes and didn't see
any test to fail?

> diff --git a/sql/table.cc b/sql/table.cc
> index 4f65dbd65f4..9c205fc4be6 100644
> --- a/sql/table.cc
> +++ b/sql/table.cc
> @@ -6722,6 +6722,8 @@ Item *create_view_field(THD *thd, TABLE_LIST *view, Item **field_ref,
>                          LEX_CSTRING *name)
>  {
>    bool save_wrapper= thd->lex->first_select_lex()->no_wrap_view_item;
> +  bool *wrapper_to_set= thd->lex->current_select ?
> +    &thd->lex->current_select->no_wrap_view_item : &save_wrapper;
>    Item *field= *field_ref;
>    DBUG_ENTER("create_view_field");
> 
> @@ -6737,17 +6739,17 @@ Item *create_view_field(THD *thd, TABLE_LIST *view, Item **field_ref,
>    }
> 
>    DBUG_ASSERT(field);
> -  thd->lex->current_select->no_wrap_view_item= TRUE;
> +  *wrapper_to_set= TRUE;
>    if (!field->is_fixed())
>    {
>      if (field->fix_fields(thd, field_ref))
>      {
> -      thd->lex->current_select->no_wrap_view_item= save_wrapper;
> +      *wrapper_to_set= save_wrapper;
>        DBUG_RETURN(0);
>      }
>      field= *field_ref;
>    }
> -  thd->lex->current_select->no_wrap_view_item= save_wrapper;
> +  *wrapper_to_set= save_wrapper;
>    if (save_wrapper)
>    {
>      DBUG_RETURN(field);


BR
 Sergei
--
Sergei Petrunia, Software Developer
MariaDB Corporation | Skype: sergefp | Blog: http://petrunia.net