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https://issues.apache.org/jira/browse/HIVE-22239?focusedWorklogId=324944&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-324944
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ASF GitHub Bot logged work on HIVE-22239:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 08/Oct/19 08:47
Start Date: 08/Oct/19 08:47
Worklog Time Spent: 10m
Work Description: kgyrtkirk commented on pull request #787: HIVE-22239
URL: https://github.com/apache/hive/pull/787#discussion_r332382671
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File path: ql/src/test/results/clientpositive/llap/bucket_map_join_tez2.q.out
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@@ -759,50 +759,56 @@ STAGE PLANS:
Statistics: Num rows: 500 Data size: 2000 Basic stats:
COMPLETE Column stats: COMPLETE
Filter Operator
predicate: (key > 2) (type: boolean)
- Statistics: Num rows: 166 Data size: 664 Basic stats:
COMPLETE Column stats: COMPLETE
+ Statistics: Num rows: 498 Data size: 1992 Basic stats:
COMPLETE Column stats: COMPLETE
Select Operator
expressions: key (type: int)
outputColumnNames: _col0
- Statistics: Num rows: 166 Data size: 664 Basic stats:
COMPLETE Column stats: COMPLETE
- Map Join Operator
- condition map:
- Inner Join 0 to 1
- keys:
- 0 _col0 (type: int)
- 1 _col0 (type: int)
- outputColumnNames: _col0, _col1
- input vertices:
- 1 Map 2
- Statistics: Num rows: 272 Data size: 2176 Basic stats:
COMPLETE Column stats: COMPLETE
- File Output Operator
- compressed: false
- Statistics: Num rows: 272 Data size: 2176 Basic
stats: COMPLETE Column stats: COMPLETE
- table:
- input format:
org.apache.hadoop.mapred.SequenceFileInputFormat
- output format:
org.apache.hadoop.hive.ql.io.HiveSequenceFileOutputFormat
- serde:
org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
+ Statistics: Num rows: 498 Data size: 1992 Basic stats:
COMPLETE Column stats: COMPLETE
+ Reduce Output Operator
+ key expressions: _col0 (type: int)
+ sort order: +
+ Map-reduce partition columns: _col0 (type: int)
+ Statistics: Num rows: 498 Data size: 1992 Basic stats:
COMPLETE Column stats: COMPLETE
Review comment:
disable enhancement; seems to be interfering with the test
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Issue Time Tracking
-------------------
Worklog Id: (was: 324944)
Time Spent: 1h (was: 50m)
> Scale data size using column value ranges
> -----------------------------------------
>
> Key: HIVE-22239
> URL: https://issues.apache.org/jira/browse/HIVE-22239
> Project: Hive
> Issue Type: Improvement
> Components: Physical Optimizer
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-22239.01.patch, HIVE-22239.02.patch,
> HIVE-22239.patch
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> Currently, min/max values for columns are only used to determine whether a
> certain range filter falls out of range and thus filters all rows or none at
> all. If it does not, we just use a heuristic that the condition will filter
> 1/3 of the input rows. Instead of using that heuristic, we can use another
> one that assumes that data will be uniformly distributed across that range,
> and calculate the selectivity for the condition accordingly.
> This patch also includes the propagation of min/max column values from
> statistics to the optimizer for timestamp type.
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