Subject RE: [firebird-support] unknown cursor error
Author Helen Borrie
At 07:53 AM 5/12/2005 +1100, Alan McDonald wrote:

>without seeing how you've declared your cursor how would anyone know?
>I'd say it's a bug in your code. Let's see more about cT1.

One doesn't declare the cursor for this syntax. The instantiation of the
read cursor was correct in the supplied source code, i.e. "
cursor cT1".

Cursor operations can read non-updatable sets but write operations are
impossible on such sets because WHERE CURRENT OF uses the rdb$db_key to
match the current output row to a row in the supplying table. As you
probably know, the rdb$db_key of a joined output row doesn't have an
underlying table to match up to...