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Posted to reviews@spark.apache.org by "zml1206 (via GitHub)" <gi...@apache.org> on 2024/03/01 02:44:40 UTC
[PR] [SPARK-47239][SQL] Support distinct window function [spark]
zml1206 opened a new pull request, #45349:
URL: https://github.com/apache/spark/pull/45349
### What changes were proposed in this pull request?
Use hashset to support distinct window function when window frame is entire partition frame or
growing frame.
### Why are the changes needed?
Distinct window function is a commonly used function and is supported by many SQL engines, such as hive, impala, clickhouse, and presto.
### Does this PR introduce _any_ user-facing change?
Yes, after this pr, can use dinctinct window function like hive.
### How was this patch tested?
UT.
### Was this patch authored or co-authored using generative AI tooling?
No.
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Re: [PR] [SPARK-47239][SQL] Support distinct window function [spark]
Posted by "zml1206 (via GitHub)" <gi...@apache.org>.
zml1206 commented on PR #45349:
URL: https://github.com/apache/spark/pull/45349#issuecomment-1978489581
cc @cloud-fan What do you think of this feature?
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