Hive boolean converts to 'nan' in dataframe while BigQuery converts to 'None'

[nehanene15]

When comparing Hive to BigQuery, if a boolean value is NULL, the value is expressed as 'nan' in Hive and 'None' in BigQuery, making the comparison a mismatch.

This occurs when grouping by a boolean value.

Command to reproduce:
data-validation -v validate column -sc hive_conn2 -tc bq_conn -tbls source=target --grouped-columns boolean_col