When I have columns with numeric content that has 19 digits then the CSV reader tries to convert it to double and the content is incorrect. Example where the last 2 digits of the second row are read incorrectly (…770):
How can I avoid / fix that?
You can double click on the column header in the node configuration and specify a different type.
Use File Reader instead. It has a column type configuration on preview. Then you click on a header menu with types popups.
Whoups. @izaychik63 is entirely right, my answer was targeted to File Reader instead of CSV Reader.