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