[jira] [Updated] (HIVE-26371) Constant propagation does not evaluate constraint expressions at merge when CBO is enabled

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-26371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HIVE-26371:
----------------------------------
    Labels: pull-request-available  (was: )

> 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: 10m
>  Remaining Estimate: 0h
>
> {code}
> 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)