DB Looping node with empty input

I’ve got unexpected message from DB Looping node in case I have an empty input:

ERROR DB Looping 4:137 Execute failed: count is negative: -1

KNIME v.4.7.8.
Is this expected result? Could node produce just empty output as Parameterized DB Query Reader?

Hi @izaychik63, I get the same result in KNIME 5.2.2

If you untick the “Read All” box, does this resolve it - and cause the node to return an Empty Table

(and importantly, does it still then work ok, when the input table has rows?)

1 Like