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Posted to issues@spark.apache.org by "Bruce Wong (Jira)" <ji...@apache.org> on 2021/07/19 03:30:00 UTC
[jira] [Commented] (SPARK-36203) Spark SQL can't use "group by" on
the column of map type.
[ https://issues.apache.org/jira/browse/SPARK-36203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17382971#comment-17382971 ]
Bruce Wong commented on SPARK-36203:
------------------------------------
sql:
select distinct idselect distinct id , cols , extend_value from test.test_table
-- extend_value's type is map<String, String>.
error:
Sql执行错误:org.apache.spark.sql.AnalysisException: Cannot have map type columns in DataFrame which calls set operations(intersect, except, etc.), but the type of column extend_value is map<string,string>;
> Spark SQL can't use "group by" on the column of map type.
> ---------------------------------------------------------
>
> Key: SPARK-36203
> URL: https://issues.apache.org/jira/browse/SPARK-36203
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.5
> Reporter: Bruce Wong
> Priority: Major
>
> I want to know why the 'group by' can't use in column of map tyep.
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