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https://issues.apache.org/jira/browse/SPARK-33137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17216385#comment-17216385
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Apache Spark commented on SPARK-33137:
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User 'huaxingao' has created a pull request for this issue:
https://github.com/apache/spark/pull/30089
> Support ALTER TABLE in JDBC v2 Table Catalog: update type and nullability of
> columns (PostgreSQL dialect)
> ---------------------------------------------------------------------------------------------------------
>
> Key: SPARK-33137
> URL: https://issues.apache.org/jira/browse/SPARK-33137
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Huaxin Gao
> Priority: Major
>
> Override the default SQL strings for:
> ALTER TABLE UPDATE COLUMN TYPE
> ALTER TABLE UPDATE COLUMN NULLABILITY
> in the following PostgreSQL JDBC dialect according to official documentation.
> Write PostgreSQL integration tests for JDBC.
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