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https://issues.apache.org/jira/browse/DRILL-7117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16803338#comment-16803338
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ASF GitHub Bot commented on DRILL-7117:
---------------------------------------
gparai 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_r269752646
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/planner/common/DrillStatsTable.java
##########
@@ -62,10 +62,15 @@
public enum STATS_VERSION {V0, V1};
// The current version
public static final STATS_VERSION CURRENT_VERSION = STATS_VERSION.V1;
+ // 10 histogram buckets (TODO: can make this configurable later)
+ public static final int NUM_HISTOGRAM_BUCKETS = 10;
Review comment:
Maybe we can look at other implementations to figure out a good default
value for histogram buckets.
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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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