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HansF wrote:
> On Sat, 25 Feb 2006 22:25:02 +0000, Tony Rogerson wrote:
>
>
>>What you mean - they use portable SQL as definied by the ANSI SQL standard, >>something Oracle doesn't do very well! Come on guys, catch up!! Talk about >>MS locking people in - LOL!
Hang on..., have you seen many shops that actually switch an app after
those three years (from or to Oracle, doesn't matter)? The moment the
application logic (which includes procedures) has committed to the misc.
features of a given product migration costs skyrocket.
Typically this leads to an interesting rift between those in control of
the money and the DBAs.
The DBAs want to stay with their product (which they know) and the CFO
wants to move but can't afford it.
In short applications are only migrated (or ported) when the executives
get seriously pissed at the vendor or the customer hits a technological
brick wall.
ISVs are in a slightly different set of troubles. They have an interest
to support multiple DBMS vendors since there are sufficient numbers of
customers who make app decisions based on the underlying DBMS.
So ISVs are either more keen on not exploiting extensions to the
standard (which is different from proprietary features) or they are
willing to pit down the porting cost (and subsequent dual maintenance).
It's actually quite a game between customers and vendors to negotiate around that bluff (it often is nothing more but) to switch platforms if the licensing isn't renewed in a favorable way to the customer.
Those apps which are being migrated exploit few app level features. At teh same time we "SQL professionals" bicker about the Java hordes we have to ask ourselves if we aren't contributing to the problem....
Cheers
Serge
-- Serge Rielau DB2 Solutions Development IBM Toronto LabReceived on Sun Feb 26 2006 - 06:12:50 CST