Here is a potential hole. By default (unless ExtendedType is explicitly defined for a given Java class), Cayenne does the following JDBC calls:

PreparedStatement st = ..
if (scale != -1) {
   st.setObject(pos, val, type, scale);
}
else {
   st.setObject(pos, val, type);
}

Looks correct from the JDBC standpoint, but from my experience some drivers may have it all wrong, and inconsistent with a corresponding 'setSpecificType(..)' method for a given object class. So what is the class of the object parameter? BigDecimal? Something else?

Andrus


On Aug 8, 2008, at 2:16 PM, Øyvind Harboe wrote:

On Fri, Aug 8, 2008 at 7:53 PM, Andrus Adamchik <[EMAIL PROTECTED] > wrote:
Cayenne doesn't do anything special on Derby vs. SQLServer in this respect.

My thinking was that databases behaved differently here and that
Cayenne then either defines that the default behaviour is undefined
when scale is not specified or that Cayenne defines it to be the
same as whatever the database does.

Is this behavior happening for selected objects or when binding a query
parameter?

First I run an update w/a prepared statement(or rather Cayenne uses prepared
statements for updates) and afterwards the queries return e.g. "1"
instead of "1.5".

If I run a select statement from *outside* Cayenne, it reveals that the data in
the database are actually truncated.

Is there a testcase for this in Cayenne?

--
Øyvind Harboe
http://www.zylin.com/zy1000.html
ARM7 ARM9 XScale Cortex
JTAG debugger and flash programmer


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