[GitHub] [iceberg] shardulm94 commented on issue #7775: The Orc file (via iceberg)because large than Orc file(only via spark) ?

["shardulm94 (via GitHub)" <gi...@apache.org>]

shardulm94 commented on issue #7775:
URL: https://github.com/apache/iceberg/issues/7775#issuecomment-1612440097

   @ZhendongBai Since the issue is specific to string columns, I am guessing Iceberg and Spark might different setting for ORC's dictionary encoding for string columns. See https://orc.apache.org/specification/ORCv1/#string-char-and-varchar-columns
   
   One way to verify this would be to run `orc-tools` command on the generated ORC files. See https://orc.apache.org/docs/java-tools.html. Take a look at the [encoding for the columns](https://orc.apache.org/docs/java-tools.html#:~:text=Encoding%20column%2014%3A-,DICTIONARY_V2,-%5B2%5D%0A%20%20%20%20Encoding%20column), if dictionary encoding is used it would be DICTIONARY or DICTIONARY_V2, if not it would be DIRECT or DIRECT_V2.
   


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