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https://issues.apache.org/jira/browse/SPARK-34379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17279892#comment-17279892
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Apache Spark commented on SPARK-34379:
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User 'sarutak' has created a pull request for this issue:
https://github.com/apache/spark/pull/31491
> Map JDBC RowID to StringType rather than LongType
> -------------------------------------------------
>
> Key: SPARK-34379
> URL: https://issues.apache.org/jira/browse/SPARK-34379
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Kousuke Saruta
> Assignee: Kousuke Saruta
> Priority: Minor
>
> In the current implementation, JDBC RowID type is mapped to LongType except
> for OracleDialect, but there is no guarantee to be able to convert RowID to
> long.
> java.sql.RowId declares toString and the specification of java.sql.RowId says
> _all methods on the RowId interface must be fully implemented if the JDBC
> driver supports the data type_
> (https://docs.oracle.com/javase/8/docs/api/java/sql/RowId.html)
> So, we should prefer StringType to LongType.
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