I'm looking to use the Java JDBC adapter for loading tables from SQL Server into Arrow record batches.
At first glance the Arrow JDBC adapter seems to work well but, unless I'm mistaken, it simply makes every vector nullable, irrespective of whether the corresponding SQL column is nullable or not. I think the line final FieldType fieldType = new FieldType(true, arrowType, /* dictionary encoding */ null, metadata); in https://github.com/apache/arrow/blob/master/java/adapter/jdbc/src/main/java/org/apache/arrow/adapter/jdbc/JdbcToArrowUtils.java#L158 might be the cause here. Is my interpretation correct, or am I missing a setting of sorts? If indeed correct, is there a fundamental reason the NULL-ness is not transferred, or is this something I could contribute in a PR? (which I'd be happy to) I guess it's just a matter of inspecting the result metadata. Cheers, -J
