[GitHub] [iceberg] samarthjain opened a new issue #1315: [python-iceberg] Scan plan files not working correctly when filters are present

[GitBox <gi...@apache.org>]

samarthjain opened a new issue #1315:
URL: https://github.com/apache/iceberg/issues/1315


   For example - for an iceberg table partitioned by dateint, the following call returns all the files in the current snapshot as opposed to returning only those files that have `dateint=20200805` 
   
   ```
   Scan scan = scan.filter("dateint=20200805");
   for task in scan.plan_files():
     print(task.file.path()) // This prints paths for all the files
   ```
   
   To workaround this, I had to directly create the `DataTableScan` object passing in the filter. 
   ```
   scan = DataTableScan(
                           ops=tbl.ops,
                           table=tbl,
                           schema=None,
                           snapshot_id=tbl.current_snapshot(),
                           row_filter=Expressions.convert_string_to_expr("dateint=20200805"),
                       )
   
   for task in scan.plan_files(tbl.ops, tbl.current_snapshot()):
     print (task.file.path()) // this prints only the files that belong to partition `dateint=20200805`
   ```
   


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