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https://issues.apache.org/jira/browse/HIVE-23462?focusedWorklogId=438608&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-438608
]
ASF GitHub Bot logged work on HIVE-23462:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 29/May/20 08:08
Start Date: 29/May/20 08:08
Worklog Time Spent: 10m
Work Description: kgyrtkirk commented on a change in pull request #1031:
URL: https://github.com/apache/hive/pull/1031#discussion_r432323344
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/HiveRelBuilder.java
##########
@@ -157,6 +159,12 @@ public static SqlAggFunction getRollup(SqlAggFunction
aggregation) {
return null;
}
+ @Override
+ public AggCall aggregateCall(SqlAggFunction aggFunction, boolean distinct,
boolean approximate, boolean ignoreNulls,
+ RexNode filter, ImmutableList<RexNode> orderKeys, String alias,
ImmutableList<RexNode> operands) {
+ return super.aggregateCall(aggFunction, distinct, approximate,
ignoreNulls, filter, orderKeys, alias, operands);
Review comment:
actually
[AggregateCall#isApproximate](https://github.com/apache/calcite/blob/abe772018a6adb5007429e0c1c83b6e7d83a1c71/core/src/main/java/org/apache/calcite/rel/core/AggregateCall.java#L218)
is only used at one place - to decide to merge or not aggregates (in
[AggregateMergeRule](https://github.com/apache/calcite/blob/abe772018a6adb5007429e0c1c83b6e7d83a1c71/core/src/main/java/org/apache/calcite/rel/rules/AggregateMergeRule.java#L70));
I now think that I've incorrectly set it to true - although the sketch will
collect some features of the dataset; the approximation will be done by the
`sketch_estimate` function
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Issue Time Tracking
-------------------
Worklog Id: (was: 438608)
Time Spent: 1h (was: 50m)
> Add option to rewrite NTILE to sketch functions
> -----------------------------------------------
>
> Key: HIVE-23462
> URL: https://issues.apache.org/jira/browse/HIVE-23462
> Project: Hive
> Issue Type: Sub-task
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-23462.01.patch, HIVE-23462.02.patch,
> HIVE-23462.03.patch, HIVE-23462.04.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
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