[
https://issues.apache.org/jira/browse/HIVE-26524?focusedWorklogId=814068&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-814068
]
ASF GitHub Bot logged work on HIVE-26524:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 05/Oct/22 20:05
Start Date: 05/Oct/22 20:05
Worklog Time Spent: 10m
Work Description: kasakrisz commented on code in PR #3588:
URL: https://github.com/apache/hive/pull/3588#discussion_r985791359
##########
ql/src/test/results/clientpositive/llap/auto_join21.q.out:
##########
@@ -43,37 +45,38 @@ STAGE PLANS:
outputColumnNames: _col0, _col1, _col2, _col3
input vertices:
1 Map 2
- Statistics: Num rows: 1 Data size: 356 Basic stats:
COMPLETE Column stats: COMPLETE
+ Statistics: Num rows: 55 Data size: 19580 Basic stats:
COMPLETE Column stats: COMPLETE
Reduce Output Operator
key expressions: _col2 (type: string)
null sort order: z
sort order: +
Map-reduce partition columns: _col2 (type: string)
- Statistics: Num rows: 1 Data size: 356 Basic stats:
COMPLETE Column stats: COMPLETE
+ Statistics: Num rows: 55 Data size: 19580 Basic
stats: COMPLETE Column stats: COMPLETE
value expressions: _col0 (type: string), _col1
(type: string), _col3 (type: string)
Execution mode: vectorized, llap
LLAP IO: all inputs
Map 2
Map Operator Tree:
TableScan
alias: src2
+ filterExpr: ((UDFToDouble(key) > 9.0D) and (UDFToDouble(key)
< 11.0D)) (type: boolean)
Statistics: Num rows: 500 Data size: 89000 Basic stats:
COMPLETE Column stats: COMPLETE
- Limit
- Number of rows: 0
- Statistics: Num rows: 1 Data size: 178 Basic stats:
COMPLETE Column stats: COMPLETE
+ Filter Operator
+ predicate: ((UDFToDouble(key) > 9.0D) and
(UDFToDouble(key) < 11.0D)) (type: boolean)
+ Statistics: Num rows: 55 Data size: 9790 Basic stats:
COMPLETE Column stats: COMPLETE
Review Comment:
Added comments to the jira.
##########
ql/src/test/queries/clientpositive/antijoin.q:
##########
@@ -44,7 +44,7 @@ explain cbo select a.key, a.value from t1_n55 a left join
t2_n33 b on a.key=b.ke
select a.key, a.value from t1_n55 a left join t2_n33 b on a.key=b.key join
t3_n12 c on a.key=c.key where b.key is null sort by a.key, a.value;
Issue Time Tracking
-------------------
Worklog Id: (was: 814068)
Time Spent: 6h 20m (was: 6h 10m)
> Use Calcite to remove sections of a query plan known never produces rows
> ------------------------------------------------------------------------
>
> Key: HIVE-26524
> URL: https://issues.apache.org/jira/browse/HIVE-26524
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Reporter: Krisztian Kasa
> Assignee: Krisztian Kasa
> Priority: Major
> Labels: pull-request-available
> Time Spent: 6h 20m
> Remaining Estimate: 0h
>
> Calcite has a set of rules to remove sections of a query plan known never
> produces any rows. In some cases the whole plan can be removed. Such plans
> are represented with a single {{Values}} operators with no tuples. ex.:
> {code:java}
> select y + 1 from (select a1 y, b1 z from t1 where b1 > 10) q WHERE 1=0
> {code}
> {code:java}
> HiveValues(tuples=[[]])
> {code}
> Other cases when plan has outer join or set operators some branches can be
> replaced with empty values moving forward in some cases the join/set operator
> can be removed
> {code:java}
> select a2, b2 from t2 where 1=0
> union
> select a1, b1 from t1
> {code}
> {code:java}
> HiveAggregate(group=[{0, 1}])
> HiveTableScan(table=[[default, t1]], table:alias=[t1])
> {code}
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
