maria-developers team mailing list archive

[Sergei Golubchik <serg@xxxxxxxxxxx>]

Hi, Eugene!

What are you trying to do in the first place?

On May 30, Eugene Kosov wrote:
> Hello.
> 
> I need to see a table structure while executing some query (DELETE in my case, but there will be more query types in future). I have a TABLE_LIST which came from a parser. Now I'm opening it with open_table_only_view_structure(), examine table structure and close it, trying to prevent any side effects. And there is a lot of them.
> 
> Current code looks like this:
> 
>   if (open_tables_only_view_structure(thd, table_list, false))
>   {
>     return true;
>   }
> 
>   // examine table structure
> 
>   close_mysql_tables(thd);
> 
>   for (Sroutine_hash_entry *e = thd->lex->sroutines_list.first;e; e=e->next)
>     e->mdl_request.ticket= NULL;
> 
>   for (TABLE_LIST *it= table_list; it; it= it->next_global)
>   {
>     it->table= NULL;
>     it->reinit_before_use(thd);
>     //it->next_global= NULL;
>     it->derived_result= NULL;
>     it->derived= NULL;
>     it->view= NULL;
>     it->view_tables= NULL;
>     it->view_sctx= NULL;
>     it->file_version= 0;
>     it->mariadb_version= 0;
>     it->updatable_view= 0;
>     it->view_suid= 0;
>     it->derived_type= 0;
>     it->open_type= OT_BASE_ONLY;
>     it->view_creation_ctx= 0;
>     //    it->set_table_ref_id(TABLE_REF_NULL, 0);
>   }
> 
> Is there a way to close a TABLE_LIST gracefully without touching a lot of it's fields? Or even maybe it's possible to open a table in a simpler manner?
> 
> 
> -- 
> Eugene
> 
> 
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Regards,
Sergei
Chief Architect MariaDB
and security@xxxxxxxxxxx