difin commented on code in PR #5792:
URL: https://github.com/apache/hive/pull/5792#discussion_r2083224234
##########
iceberg/iceberg-handler/src/main/java/org/apache/iceberg/mr/hive/compaction/IcebergQueryCompactor.java:
##########
@@ -96,16 +106,46 @@ public boolean run(CompactorContext context) throws
IOException, HiveException,
throw new HiveException(ErrorMsg.COMPACTION_NO_PARTITION);
}
} else {
- long partitionHash = IcebergTableUtil.getPartitionHash(icebergTable,
partSpec);
+ Pair<Integer, StructProjection> partSpecPair =
+ IcebergTableUtil.getPartitionSpecIdAndStruct(icebergTable, partSpec);
Review Comment:
> partition struct in the PARTITIONS table == partition struct in the FILES
table
Correct
> partition struct in the PARTITIONS table == partition struct in the FILES
table, so I still don't understand why we can't directly look up the FILES
table?
We don't have the values readily available that can be used in SQL
conditions on the partition struct.
We do not lookup the `partitions` table using SQL. We lookup using Iceberg
API to get the raw partition values (partition struct) that after
transformations can be used in SQL condition on partition struct.
> From the above example, what do we pass in partitionPath:
event_src_trunc=BBB/event_time_month=2024-08? Based on that can't we construct
a proper named_struct filter?
No, we can't construct based on human readable values.
In this example, `ci.partName` =
`event_src_trunc=BBB/event_time_month=2024-08`
but struct in files metadata table is
`named_struct("event_src_trunc","BBB",event_time_month,655)`
`event_time_month` is `int` with value of 655.
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