Query with dynamic prefix computed fields on external dataset returns empty for avro file format

Steps to reproduce -

1. Create an external dataset with AVRO file format

   CREATE EXTERNAL DATASET Default.Default.gXeAxG4EMBnpeGWiO5XZi7uix1LMbC ON `columnar-functional-sanity-test-data` AT Default.Default.lnytUuF2No1gl USING "level_{level_no:int}_folder_{folder_no:int}" WITH {"include": "*.avro", "format": "avro"};

2. Run following query

   select count(*) from Default.Default.gXeAxG4EMBnpeGWiO5XZi7uix1LMbC where level_no=1 and folder_no=1

3. Above query returns empty result.
4. But if we run below query, it returns correct result

   select count(*) from Default.Default.ECPRgWAcj

   This issue is not seen for external datasets created for other file formats.