EralpB opened a new issue, #5764:
URL: https://github.com/apache/iceberg/issues/5764

   ### Query engine
   
   trino (maybe spark)
   
   ### Question
   
   Hello pardon my ignorance, I wasn't sure if this is trino or iceberg 
question.
   
   I'm trying to insert 200 million rows which have random uuids to a target 
table which bucket partitions this into 4 buckets.
   
   my insert performance is 2 minutes with NO bucketing, and up to 2 hours with 
4 buckets.
   
   I assume it's because of the hashing function jumps back and forth between 
the partitions so what I want to do is something like:
   
   INSERT INTO target_table
   SELECT id FROM source_table ORDER BY bucket(id,4)
   
   I can't seem to access `bucket` or the murmur3 hash function from the SQL, 
what can you suggest?
   
   as a fallback I could use truncate function to partition uuids then I can 
just string order ids and it'll be predictable..
   
   thanks.
   


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