[
https://issues.apache.org/jira/browse/HIVE-26371?focusedWorklogId=788938&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-788938
]
ASF GitHub Bot logged work on HIVE-26371:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 08/Jul/22 11:08
Start Date: 08/Jul/22 11:08
Worklog Time Spent: 10m
Work Description: kasakrisz merged PR #3415:
URL: https://github.com/apache/hive/pull/3415
Issue Time Tracking
-------------------
Worklog Id: (was: 788938)
Time Spent: 20m (was: 10m)
> Constant propagation does not evaluate constraint expressions at merge when
> CBO is enabled
> ------------------------------------------------------------------------------------------
>
> Key: HIVE-26371
> URL: https://issues.apache.org/jira/browse/HIVE-26371
> Project: Hive
> Issue Type: Bug
> Components: CBO, Logical Optimizer
> Reporter: Krisztian Kasa
> Assignee: Krisztian Kasa
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Prior HIVE-23089 check and not null constraint violations may detected faster
> when merging.
> {code:java}
> CREATE TABLE t_target(
> name string CHECK (length(name)<=20),
> age int,
> gpa double CHECK (gpa BETWEEN 0.0 AND 4.0))
> stored as orc TBLPROPERTIES ('transactional'='true');
> CREATE TABLE t_source(
> name string,
> age int,
> gpa double);
> insert into t_source(name, age, gpa) values ('student1', 16, null);
> insert into t_target(name, age, gpa) values ('student1', 16, 2.0);
> merge into t_target using t_source source on source.age=t_target.age when
> matched then update set gpa=6;
> {code}
> Currently CBO can not handle constraint checks when merging so the filter
> operator with the {{enforce_constraint}} call is added to the Hive operator
> plan after CBO is succeeded and {{ConstantPropagate}} optimization is called
> only from TezCompiler with {{{}ConstantPropagateOption.SHORTCUT{}}}.
> With this option {{ConstantPropagate}} does not evaluate deterministic
> functions.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
