Re: bzr commit into mysql-6.0 branch (davi:2746) Bug#989 WL#4284

[Konstantin Osipov]

* Davi Arnaut <Davi.Arnaut@stripped> [09/03/23 21:19]:
>  2746 Davi Arnaut	2009-03-23
>       Bug#989: If DROP TABLE while there's an active transaction, wrong binlog order
>       WL#4284: Transactional DDL locking

 
> === modified file 'sql/sql_prepare.cc'
> --- a/sql/sql_prepare.cc	2009-03-18 12:49:07 +0000
> +++ b/sql/sql_prepare.cc	2009-03-23 18:17:10 +0000
> @@ -3147,6 +3147,7 @@ bool Prepared_statement::prepare(const c
>    bool error;
>    Statement stmt_backup;
>    Query_arena *old_stmt_arena;
> +  MDL_ticket *mdl_savepoint= NULL;
>    DBUG_ENTER("Prepared_statement::prepare");
>    /*
>      If this is an SQLCOM_PREPARE, we also increase Com_prepare_sql.
> @@ -3205,6 +3206,13 @@ bool Prepared_statement::prepare(const c
>    */
>    DBUG_ASSERT(thd->change_list.is_empty());
>  
> +  /*
> +    Marker used to release metadata locks acquired while the prepared
> +    statement is being checked.
> +  */
> +  if (thd->in_multi_stmt_transaction())
> +    mdl_savepoint= thd->mdl_context.mdl_savepoint();
> +

OK to push.

--