This node reads a spread sheet and provides it at its output port.
It reads only data from one sheet, but it is possible to read multiple files that contain the same sheet name at once.
It can read only numeric, date, boolean and string data but, of course, no diagrams, pictures, or other items.
Currently supported KNIME types are String, TimeAndDate, Double, Boolean, and Int.
It reads in the data from the sheet and sets a type for all columns that is compatible with the data in that column (in the worst case "String" covers all).
The performance of the reader node is limited (due to the underlying library of the Apache POI project). Reading large files takes a very long time and uses a lot of memory (especially files in xlsx format when formula reevaluation is selected).