> ------------------------------------------------------------
> revno: 2818.1.4
> revision-id: ramil@mysql.com-20091021090408-208mvwwrcroi2j8c
> parent: azundris@mysql.com-20091021033856-ydodp4q42o58e7ka
> committer: Ramil Kalimullin <ramil@mysql.com>
> branch nick: b47019-5.0-bugteam
> timestamp: Wed 2009-10-21 14:04:08 +0500
> message:
>   Fix for bug#47019: Assertion failed: 0, file .\rt_mbr.c, 
>   line 138 when forcing a spatial index
>   
>   Problem: "Spatial indexes can be involved in the search 
>   for queries that use a function such as MBRContains() 
>   or MBRWithin() in the WHERE clause".
>   Using spatial indexes for JOINs with =, <=> etc.
>   predicates is incorrect.
>   
>   Fix: disable spatial indexes for such queries.