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https://issues.apache.org/jira/browse/HIVE-30162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopinath reassigned HIVE-30162:
-------------------------------
Assignee: Gopinath
> PTF: Vectorize ntile with a non-constant number of buckets
> ----------------------------------------------------------
>
> Key: HIVE-30162
> URL: https://issues.apache.org/jira/browse/HIVE-30162
> Project: Hive
> Issue Type: Sub-task
> Reporter: Gopinath
> Assignee: Gopinath
> Priority: Major
>
> Row mode (GenericUDAFNTile) accepts a non-constant int argument, e.g.
> ntile(col), and reads the bucket count from the first row of each partition.
> HIVE-30018 vectorizes ntile only for a positive int constant; other forms
> fall back to row mode with notVectorizedReason: PTF operator: ntile only
> supports a positive integer constant number of buckets. For parity,
> VectorPTFEvaluatorNTile could read the bucket count from the first buffered
> row of each partition. Row mode doesn't validate the value (0, negative or
> NULL), so vectorized behaviour for those cases has to match it.
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