Re: RE: [others] Re: Views with functions and performance issues

2006-09-22 Thread Dan Buettner
The hit with a join on indexed columns is negligible. Relational databases live for joins - they eat them for breakfast! Seriously, as long as it's indexed in both tables, it'll be super-speedy. Dan On 9/22/06, Christopher Brooks <[EMAIL PROTECTED]> wrote: Hi, thanks for the comments, > If I

RE: [others] Re: Views with functions and performance issues

2006-09-22 Thread Christopher Brooks
Hi, thanks for the comments, > If I'm understanding right - the view contains an additional > column that is an MD5 hash of some or all of the data in the > base table, right? Close. It's got all of the data in the base table except for the colum that's being hashed - we show the hashed versio

Re: Views with functions and performance issues

2006-09-22 Thread Dan Buettner
If I'm understanding right - the view contains an additional column that is an MD5 hash of some or all of the data in the base table, right? Yes, I would expect that to be very very slow. When selecting, your database engine has tro calculate 700K MD5 hashes. Slow. When selecting a subset it h