epdv wrote:
Hello!
I want to read blobs in a loop (more exact: the length of the blobs).
I'm using a connection with autocommit(true) and a prepared statement
with sth. like "select mydata, myblob where mykey=?".
Then I'm using the following loop:
while (rs.next()) {
int m = wantedColumnNames.length;
Blob blob = (Blob)rs.getObject(x);
if (blob == null) {
result = 0L;
} else {
result = blob.length();
blob.free();
}
...
}
I'm always getting an error message saying that the blob cannot be
released after closing, probably the transaction had already been
committed. As connection is in autocommit mode, I assume it has already
been closed after statement execution, but it I try non-autocommit mode,
the resultset is not open after execute (at least derby says that). How
can I get the expected result?
Hello Peter,
Can you post the stack traces from the exceptions you get?
That would be nice, so that we can see where the exception is being thrown.
It shouldn't matter, but have you tried using getBlob() instead of
getObject()?
If possible, posting the runnable code somewhere may also help.
Regards,
--
Kristian
BTW, using derby 10.4.2.0 in client/server mode.
Kind regards
Peter
