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https://issues.apache.org/jira/browse/IMPALA-14566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18041927#comment-18041927
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Michael Smith commented on IMPALA-14566:
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Please review
https://cwiki.apache.org/confluence/display/IMPALA/Contributing+to+Impala. It
discusses submitting to https://gerrit.cloudera.org/, where we review new
patches.
> Add support for cosine similarity function
> ------------------------------------------
>
> Key: IMPALA-14566
> URL: https://issues.apache.org/jira/browse/IMPALA-14566
> Project: IMPALA
> Issue Type: Task
> Reporter: Abhishek Rawat
> Assignee: Raghav Jindal
> Priority: Major
>
> The cosine similarity function measures the angle between two vectors,
> regardless of their length (magnitude). The use cases include measuring text
> similarity and is ideal when the direction (semantic meaning/concept) is more
> important than the magnitude.
> Impala doesn't support a native vector data type yet, so we could possibly
> use an ARRAY<FLOAT> data type for representing vectors.
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