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https://issues.apache.org/jira/browse/SPARK-32510?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-32510:
-----------------------------------
Assignee: Maxim Gekk
> JDBC doesn't check duplicate column names in nested structures
> ---------------------------------------------------------------
>
> Key: SPARK-32510
> URL: https://issues.apache.org/jira/browse/SPARK-32510
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Maxim Gekk
> Assignee: Maxim Gekk
> Priority: Major
>
> JdbcUtils.getCustomSchema calls checkColumnNameDuplication() which checks
> duplicates on top-level but not in nested structures as other built-in
> datasources do, see
> [https://github.com/apache/spark/blob/8bc799f92005c903868ef209f5aec8deb6ccce5a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala#L822-L823]
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