HIVE-27938: Iceberg: Fix java.lang.ClassCastException during vectoriz… #5048
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…ed reads on partition columns
What changes were proposed in this pull request?
Add HiveIdentityPartitionConverters.java for converting partitions datatypes .
Why are the changes needed?
In this pull request apache/iceberg#1130 - Identity Partitioning: Introduced a iceberg specific constants map to convert data from java internal representations (e.g., long for timestamps) to Iceberg generics (LocalDateTime or OffsetDateTime for timestamps) .
A similar constants map is required for Hive as quoted in the following discussion.
Without this change, vectorised read queries on partition columns fail with java.lang.ClassCastException for DATE, TIMESTAMP and DECIMAL datatypes as described in the jira https://issues.apache.org/jira/browse/HIVE-27938 .
Does this PR introduce any user-facing change?
Is the change a dependency upgrade?
How was this patch tested?
Qfile :
iceberg_partition_vectorized_read.q