hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Krisztian Kasa (Jira)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-23089) Add constraint checks to CBO plan
Date Wed, 29 Apr 2020 04:19:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Krisztian Kasa updated HIVE-23089:
----------------------------------
    Status: Open  (was: Patch Available)

> Add constraint checks to CBO plan
> ---------------------------------
>
>                 Key: HIVE-23089
>                 URL: https://issues.apache.org/jira/browse/HIVE-23089
>             Project: Hive
>          Issue Type: Improvement
>          Components: CBO
>            Reporter: Krisztian Kasa
>            Assignee: Krisztian Kasa
>            Priority: Major
>         Attachments: HIVE-23089.1.patch, HIVE-23089.2.patch, HIVE-23089.3.patch, HIVE-23089.4.patch,
HIVE-23089.5.patch, HIVE-23089.6.patch, HIVE-23089.6.patch
>
>
> {code}
> create table acid_uami(i int,
>                  de decimal(5,2) constraint nn1 not null enforced,
>                  vc varchar(128) constraint nn2 not null enforced) clustered by (i) into
2 buckets stored as orc TBLPROPERTIES ('transactional'='true');
> explain
> update acid_uami set de=null where i=1;
> {code}
> Non-CBO path:
> {code:java}
> Map Operator Tree:
> TableScan
>             alias: acid_uami
>             filterExpr: ((i = 1) and enforce_constraint(vc is not null)) (type: boolean)
>             Statistics: Num rows: 1 Data size: 216 Basic stats: COMPLETE Column stats:
NONE
>             Filter Operator
>               predicate: ((i = 1) and enforce_constraint(vc is not null)) (type: boolean)
> {code}
> CBO path:
> {code:java}
>     Map Reduce
>       Map Operator Tree:
>           TableScan
>             alias: acid_uami
>             filterExpr: (i = 1) (type: boolean)
>             Statistics: Num rows: 1 Data size: 216 Basic stats: COMPLETE Column stats:
NONE
>             Filter Operator
>               predicate: (i = 1) (type: boolean)
> ...
>       Reduce Operator Tree:
> ...
>          Filter Operator
>             predicate: enforce_constraint((null is not null and _col3 is not null)) (type:
boolean)
> {code}
> In CBO path the enforce_constraint function is added to the plan when CBO plan is already
generated and optimized.
> {code}
> HiveSortExchange(distribution=[any], collation=[[0]])
>   HiveProject(row__id=[$5], i=[CAST(1):INTEGER], _o__c2=[null:NULL], vc=[$2])
>     HiveFilter(condition=[=($0, 1)])
>       HiveTableScan(table=[[default, acid_uami]], table:alias=[acid_uami])
> {code} 



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

Mime
View raw message