<db:listener>
This operation selects from a table at a regular interval and generates one message per obtained row. Optionally, you can provide watermark and ID columns. If a watermark column is provided, the values taken from that column are used to filter the contents of the next poll, so that only rows with a greater watermark value are returned. If an ID column is provided, this component automatically verifies that the same row is not picked twice by concurrent polls.
This operation does not support streaming, meaning that there is no need to perform additional transformations to the payload in order to access the operation results. This behavior is identical to the Query Single operation released in version 1.9.