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https://issues.apache.org/jira/browse/DRILL-7117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16805478#comment-16805478
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ASF GitHub Bot commented on DRILL-7117:
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amansinha100 commented on pull request #1715: DRILL-7117: Support creation of
equi-depth histogram for selected dat…
URL: https://github.com/apache/drill/pull/1715#discussion_r270585222
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File path: exec/java-exec/src/main/resources/drill-module.conf
##########
@@ -685,5 +685,6 @@ drill.exec.options: {
exec.query.return_result_set_for_ddl: true,
# ========= rm related options ===========
exec.rm.queryTags: "",
- exec.rm.queues.wait_for_preferred_nodes: true
+ exec.rm.queues.wait_for_preferred_nodes: true,
+ exec.statistics.tdigest_compression: 100
Review comment:
The 'compression' is the name that t-digest uses for determining the number
of centroids. I cannot think of something more generic for this since if we
change the underlying algorithm it may not use centroids at all. I am thinking
of keeping this as-is. Let me know if you can think of a generic
representation. We could revisit the HLL names if we want to be consistent.
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> Support creation of histograms for numeric data types (except Decimal) and
> date/time/timestamp
> ----------------------------------------------------------------------------------------------
>
> Key: DRILL-7117
> URL: https://issues.apache.org/jira/browse/DRILL-7117
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Query Planning & Optimization
> Reporter: Aman Sinha
> Assignee: Aman Sinha
> Priority: Major
> Fix For: 1.16.0
>
>
> This JIRA is specific to creating histograms for numeric data types: INT,
> BIGINT, FLOAT4, FLOAT8 and their corresponding nullable/non-nullable
> versions. Additionally, since DATE/TIME/TIMESTAMP are internally stored as
> longs, we should allow the same numeric type histogram creation for these
> data types as well.
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