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https://issues.apache.org/jira/browse/BEAM-12393?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17448781#comment-17448781
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Brachi Packter commented on BEAM-12393:
---------------------------------------
This is merged and fixed.
> Beam SQL support for HLL count
> ------------------------------
>
> Key: BEAM-12393
> URL: https://issues.apache.org/jira/browse/BEAM-12393
> Project: Beam
> Issue Type: New Feature
> Components: dsl-sql, extensions-java-sketching
> Reporter: Brachi Packter
> Priority: P3
> Time Spent: 1h
> Remaining Estimate: 0h
>
> There is support for HLL sketch in Ptransform:
>
> {code:java}
> p.apply("Int", Create.of(ints)).apply("IntHLL",
> ApproximateCountDistinct.globally()
> .withPercision(PRECISION));{code}
>
> or
>
> {code:java}
> PCollection<KV<Integer, Long>> result =
> p.apply("Long", Create.of(longs)).apply("LongHLL",
> ApproximateCountDistinct.perKey());
>
> {code}
> But, no support for beam sql.
> We can't initiate it to be used in SqlTransform (even the combiner:
> HllCountMergePartialFn exists)
>
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