Обсуждение: How to discern a reference column from within java??

I am trying to figure out how to discern a reference column (as shown
below) inside a java object containing the various columns in a specific
row of a table.

The table looks like:

CREATE TABLE TempTbl AS
(
    id    serial,
    type    int references TypesTbl
);

But I cannot find a way inside the jdbc API to figure out if a
particular column is a reference to another table's row. Such as:

// These are examples of possible code
TempTbl tmptbl = new TempTbl();
tmptbl.connect();
tmptbl.readRow();

...
if (tmptbl.getColumn("type").isReference())
{
    TypesTbl typestbl = new TypesTbl();
    tmptbl.setColumn("type",
        typestbl.getRowRef(tmptbl.getColumn("type"));
}

Am I missing something in the API?

Thanks for any help!
--
David A. Bartmess
Software Configuration Manager / Sr. Software Developer
eDingo Enterprises
http://edingo.net

David,

Have a look at the getImported, getExported in the databasemetadata
class

Dave
On Sun, 2002-06-09 at 13:51, David A. Bartmess wrote:
>
> I am trying to figure out how to discern a reference column (as shown
> below) inside a java object containing the various columns in a specific
> row of a table.
>
> The table looks like:
>
> CREATE TABLE TempTbl AS
> (
>     id    serial,
>     type    int references TypesTbl
> );
>
> But I cannot find a way inside the jdbc API to figure out if a
> particular column is a reference to another table's row. Such as:
>
> // These are examples of possible code
> TempTbl tmptbl = new TempTbl();
> tmptbl.connect();
> tmptbl.readRow();
>
> ...
> if (tmptbl.getColumn("type").isReference())
> {
>     TypesTbl typestbl = new TypesTbl();
>     tmptbl.setColumn("type",
>         typestbl.getRowRef(tmptbl.getColumn("type"));
> }
>
> Am I missing something in the API?
>
> Thanks for any help!
> --
> David A. Bartmess
> Software Configuration Manager / Sr. Software Developer
> eDingo Enterprises
> http://edingo.net
>
>
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> message can get through to the mailing list cleanly
>
>

Thanks, I'll check it out!

On Sun, 2002-06-09 at 21:18, Dave Cramer wrote:
> David,
>
> Have a look at the getImported, getExported in the databasemetadata
> class
>
> Dave
> On Sun, 2002-06-09 at 13:51, David A. Bartmess wrote:
> >
> > I am trying to figure out how to discern a reference column (as shown
> > below) inside a java object containing the various columns in a specific
> > row of a table.
> >
> > The table looks like:
> >
> > CREATE TABLE TempTbl AS
> > (
> >     id    serial,
> >     type    int references TypesTbl
> > );
> >
> > But I cannot find a way inside the jdbc API to figure out if a
> > particular column is a reference to another table's row. Such as:
> >
> > // These are examples of possible code
> > TempTbl tmptbl = new TempTbl();
> > tmptbl.connect();
> > tmptbl.readRow();
> >
> > ...
> > if (tmptbl.getColumn("type").isReference())
> > {
> >     TypesTbl typestbl = new TypesTbl();
> >     tmptbl.setColumn("type",
> >         typestbl.getRowRef(tmptbl.getColumn("type"));
> > }
> >
> > Am I missing something in the API?
> >
> > Thanks for any help!
> > --
> > David A. Bartmess
> > Software Configuration Manager / Sr. Software Developer
> > eDingo Enterprises
> > http://edingo.net
> >
> >
> > ---------------------------(end of broadcast)---------------------------
> > TIP 3: if posting/reading through Usenet, please send an appropriate
> > subscribe-nomail command to majordomo@postgresql.org so that your
> > message can get through to the mailing list cleanly
> >
> >
>
>
>
>
--
David A. Bartmess
Software Configuration Manager / Sr. Software Developer
eDingo Enterprises
http://edingo.net