Hi Team, We've recently started testing the behaviour of required vs optional fields, by creating a table with a required column and trying to insert a NULL value into it. We've found differing behaviour for each file format:
- ORC: it allows inserting NULLs into required fields and allows to read it back as well - AVRO: it fails at write-time, with a seemingly correct error message: "java.lang.IllegalArgumentException: Cannot write null to required string column" - PARQUET: it fails at write-time too, but with an NPE: java.lang.NullPointerException at org.apache.iceberg.parquet.ParquetValueWriters$StringWriter.write(ParquetValueWriters.java:326) Is this a known issue or did we perhaps do something incorrectly in our tests? Thanks a lot for any guidance. Best, Marton
