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https://issues.apache.org/jira/browse/FLINK-24802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17442839#comment-17442839
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Francesco Guardiani commented on FLINK-24802:
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Hi [~shenzhu0127], timo is referring to this class:
https://github.com/apache/flink/blob/da24fbf23c244771084bf0a31cdbb9749d72e80a/flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/functions/casting/RowToStringCastRule.java
similar issue applies to ARRAY and MAP types
> Improve cast ROW to STRING
> --------------------------
>
> Key: FLINK-24802
> URL: https://issues.apache.org/jira/browse/FLINK-24802
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Timo Walther
> Priority: Major
>
> When casting ROW to string, we should have a space after the comma to be
> consistent with ARRAY, MAP, etc.
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