[GitHub] [iceberg] shangxinli edited a comment on issue #193: Support Page Skipping in Iceberg Parquet Reader

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

shangxinli edited a comment on issue #193:
URL: https://github.com/apache/iceberg/issues/193#issuecomment-690760494


   It shows null to me when I do a simple writing/reading as below. 
   Dataset<Row> df = ....
   df.write().format("iceberg").mode("overwrite").save(path_name);
   spark.read().format("iceberg").load(path_name);  <<<----- This will trigger the issue that idToAlias is null. 
   
   It is null because the 2nd constructor public Schema(List<NestedField> columns) () is called from https://github.com/apache/iceberg/blob/master/core/src/main/java/org/apache/iceberg/SchemaParser.java#L240


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