public Row next() {
while(it.hasNext()) {
Sequence sequence = it.next();
if(isAccessible(session, sequence.getSequenceName()) &&
!sequence.isInternalSequence()) {
return new ValuesRow(rowType,
null, //sequence catalog
sequence.getSequenceName().getSchemaName(),
sequence.getSequenceName().getTableName(),
datatype,
sequence.getStartsWith(),