Re: ADO Server Cursors and OID

Greg Campbell wrote:
> I have created a table with a serial ID (sequenced) key_id field which
> is also the PRIMARY KEY using pgAdmin. I've looked at the create table
> statement. It has a WITHOUT OIDS clause. Table works fine, but I seem to
> be unable to make ADO server side cursors. (VB).
>
> Is there a key to enabling server side cursors.
> I can link the table in Access and browse it and change field values. It
> gives the impression of server side cursor, although I do not know if
> that is what it is really doing. The DAO engine->pgODBC may be (must be)
> behaving differently than my ADO code->pgODBC.
>
> I know I can work around with client side cursors for selects, and use
> INSERT,UPDATE executable queries. But with inserts/updates that have
> many fields or  needing to escape (/') text fields that  might contain
> quotes, the coding can get a little hairy compared to updating a cursor
> field.

I can't tell you what the problem is you are running into. I have never
used the "WITHOUT OIDS" clause, as a PG user, I am very newbie to all of
it, there is a lot about PG I still need to learn.

As far as DAO vs. ADO - yes, they operate *very* differently in regards
to pgODBC - one thing I found that forced me to go to ADO was that in
DAO you couldn't "double update" a TEXT field type (analogous to Memo
fields), like you can in DAO:

.AddNew
![field1] = "this"
![field1] = "that"
.update

The second setting of the field would cause the program to fall over.
ADO didn't have this problem.

If I could do it all over again (I couldn't modify my app to be this way
when I was converting it from Access to PG - when I mean doing it over,
I mean from the very beginnning), I would have the backend do all the
work, and only "interface" via SQL, and completely avoid "cursor
fields", as you put them.

While the coding would be difficult, I think I could probably come up
with a reusable function library to make things fairly easy, so that
something similar to the cursor fields could be done, but the function
library (or class set, or whatever) would do the translation from what I
want to the SQL to perform the actions.

I hope someone else is able to diagnose your issue, and that they post
here so I can learn something as well.

Andrew Ayers
Phoenix, Arizona

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