[SPARK-27560][Java API] Provide an hash partitioning method which supports seeding#25034
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adarmiento wants to merge 1 commit intoapache:masterfrom
Closed
[SPARK-27560][Java API] Provide an hash partitioning method which supports seeding#25034adarmiento wants to merge 1 commit intoapache:masterfrom
adarmiento wants to merge 1 commit intoapache:masterfrom
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Can one of the admins verify this patch? |
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I don't think I understand the purpose of this, from the JIRA. The same values will still hash to the same partition here. If you partition by a column and that column has all the same values, you will always get one partition. |
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What changes were proposed in this pull request?
A SeedHashPartitioner class is provided.
SeedHashPartitioner extends tue existing HashPartitioner class and receives an integer seed.
Instead of using java.Object.HashCode(), SeedHashPartitioner implements a simple seed-based hashing algorithm
How was this patch tested?
Manual testing with all the primitives and their array form.
Manual testing with boxed case classes