#18 not null constraint for jaws tablecreate

[David Jencks]

This patch to CMPFieldMetaData and JDBCInitCommand
allows the developer to specify a not null contraint in
jaws.xml, which is used in table creation by JAWS.

Points in favor of this:

1. It is a simple and important table constraint, that
can be added to jaws.xml very simply.

2. Some otherwise useful open source databases
(firebird/interbase) have a slightly archaic table
creation syntax in which a primary key field must also
be declared not null. This patch makes use of these
databases much more plausible.

Thanks
david jencks
davidjencks@earthlink.net.

The attached file has two diffs concatenated by hand,
since it appears to be possible to submit only one file
below and I haven't figured out how to get cvs to
generate only one diff file.

I submitted this patch to the mailing list shortly
before the move to sourceforge, and after a bit of
discussion nothing happened. Now that there is a more
official patch process I am resubmitting it.

[David Jencks]

Patch to add not null constraint to jaws.xml