liurenjie1024 commented on issue #1604:
URL: https://github.com/apache/iceberg-rust/issues/1604#issuecomment-3200072313

   Thanks @ZENOTME for raising this, but I have concern to do the filter in 
task planning phase, as opening data files is typically slow. There are two 
places to improve:
   1. Size base planning, see https://github.com/apache/iceberg-rust/issues/128
   2. Current data fusion table scan has only one partition: 
https://github.com/apache/iceberg-rust/blob/6e21b7fcfff2819e7d764b17eff066ed3424ccd5/crates/integrations/datafusion/src/physical_plan/scan.rs#L105
   3. Filter push down not working: 
https://github.com/apache/iceberg-rust/blob/36cc12087bc118f1fe10efa6b30db98bd9655ba7/crates/integrations/datafusion/src/table/mod.rs#L152
   
   As with row group pruning, it should be pushed to parquet reader.


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