blob = mc.openBlobHandle(blob_id);
blob = c.openBlobHandle(blob_id);
        private FBBlobInputStream() throws SQLException {            if (blob_id == 0) {                throw new SQLException("You can't read a new blob");            }            try {                blob = mc.openBlobHandle(blob_id);            }            catch (GDSException ge) {                throw new SQLException("couldn't open blob: " + blob_id + " exception: " + ge.toString());            }        }