[jira] [Assigned] (HIVE-24886) Support simple equality operations between MAP data types

["Stamatis Zampetakis (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-24886?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stamatis Zampetakis reassigned HIVE-24886:
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> Support simple equality operations between MAP data types
> ---------------------------------------------------------
>
>                 Key: HIVE-24886
>                 URL: https://issues.apache.org/jira/browse/HIVE-24886
>             Project: Hive
>          Issue Type: New Feature
>          Components: Query Planning, Query Processor
>            Reporter: Stamatis Zampetakis
>            Assignee: Stamatis Zampetakis
>            Priority: Major
>
> Currently equality operations between MAP data types work in some very limited cases e.g:
> {code:sql}
> create table table_map_types (id int, c1 map<int,int>, c2 map<int,int>);
> select id from table_map_types where map(1,1) IN (map(1,1), map(1,2), map(1,3)); 
> {code}
> but this feature was never introduced explicitly (zero tests & JIRAs around the subject) and the vast majority of queries involving comparisons between MAP types now fail at compile time.
> The goal of this issue is to support simple equality operations:
> * EQUALS(=)
> * NOT_EQUALS(<>),
> * IN,
> * IS DISTINCT FROM,
> * IS NOT DISTINCT FROM
> between MAP data types when the compared (MAP) types are identical.



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