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https://issues.apache.org/jira/browse/HIVE-25953?focusedWorklogId=732450&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-732450
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ASF GitHub Bot logged work on HIVE-25953:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Feb/22 16:15
Start Date: 24/Feb/22 16:15
Worklog Time Spent: 10m
Work Description: asolimando commented on a change in pull request #3033:
URL: https://github.com/apache/hive/pull/3033#discussion_r814042293
##########
File path: ql/src/test/results/clientpositive/llap/subquery_scalar.q.out
##########
@@ -491,25 +484,25 @@ STAGE PLANS:
aggregations: count(VALUE._col0)
mode: mergepartial
outputColumnNames: _col0
- Statistics: Num rows: 1 Data size: 196 Basic stats: COMPLETE
Column stats: NONE
- Limit
- Number of rows: 0
- Statistics: Num rows: 0 Data size: 0 Basic stats: COMPLETE
Column stats: NONE
+ Statistics: Num rows: 1 Data size: 192 Basic stats: COMPLETE
Column stats: NONE
+ Filter Operator
+ predicate: sq_count_check(_col0) (type: boolean)
+ Statistics: Num rows: 1 Data size: 192 Basic stats: COMPLETE
Column stats: NONE
Review comment:
I agree that we must be conservative with this.
I managed to create a filter in line with what you suggested, it makes less
sense but it's enough to showcase the improvement (explaining that in
downstream projects we can have `false` too) and write a unit-test.
I will open a Calcite ticket and link the current one as "blocked by".
I will probably use the `Bug` class to keep track of this dependency and/or
write a comment in `HiveRelMdPredicates` to describe the situation.
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Issue Time Tracking
-------------------
Worklog Id: (was: 732450)
Time Spent: 1h 40m (was: 1.5h)
> Drop HiveRelMdPredicates::getPredicates(Join...) to use that of
> RelMdPredicates
> -------------------------------------------------------------------------------
>
> Key: HIVE-25953
> URL: https://issues.apache.org/jira/browse/HIVE-25953
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Affects Versions: 4.0.0
> Reporter: Alessandro Solimando
> Assignee: Alessandro Solimando
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> The goal of the ticket is to unify the two implementations and remove the
> override in HiveRelMdPredicates.
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