[HIVE-20842] Fix logic introduced in HIVE-20660 to estimate statistics for group by - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: 4.0.0
Fix Version/s: 4.0.0-alpha-1
Component/s: Statistics
Labels:
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Description

~~HIVE-20660~~ introduced better estimation for group by operator. But the logic did not account for Partial and Full group by separately.
For partial group by parallelism (i.e. number of tasks) should be taken into account.

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HIVE-20842.1.patch
30/Oct/18 21:33
2 kB
Vineet Garg
HIVE-20842.10.patch
13/Nov/18 00:50
42 kB
Vineet Garg
HIVE-20842.11.patch
13/Nov/18 22:45
28 kB
Vineet Garg
HIVE-20842.12.patch
15/Nov/18 20:29
28 kB
Vineet Garg
HIVE-20842.2.patch
31/Oct/18 04:06
2 kB
Vineet Garg
HIVE-20842.3.patch
03/Nov/18 00:22
708 kB
Vineet Garg
HIVE-20842.4.patch
05/Nov/18 17:56
710 kB
Vineet Garg
HIVE-20842.5.patch
06/Nov/18 03:51
747 kB
Vineet Garg
HIVE-20842.6.patch
07/Nov/18 00:46
746 kB
Vineet Garg
HIVE-20842.7.patch
07/Nov/18 21:26
734 kB
Vineet Garg
HIVE-20842.8.patch
09/Nov/18 22:15
608 kB
Vineet Garg
HIVE-20842.9.patch
12/Nov/18 22:45
556 kB
Vineet Garg

Issue Links

is caused by

HIVE-20660 Group by statistics estimation could be improved by bounding the total number of rows to source table

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Assignee:: Vineet Garg

Reporter:: Vineet Garg

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Dates

Created:: 30/Oct/18 21:29

Updated:: 17/Nov/22 08:54

Resolved:: 16/Nov/18 01:42