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 [email protected]
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