HyukjinKwon commented on code in PR #44507:
URL: https://github.com/apache/spark/pull/44507#discussion_r1436983679
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sql/core/src/main/scala/org/apache/spark/sql/DataSourceRegistration.scala:
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@@ -43,6 +46,33 @@ private[sql] class DataSourceRegistration private[sql]
(dataSourceManager: DataS
| pythonExec: ${dataSource.dataSourceCls.pythonExec}
""".stripMargin)
+ checkDataSourceExists(name)
+
dataSourceManager.registerDataSource(name, dataSource)
}
+
+ /**
+ * Checks if the specified data source exists.
+ *
+ * This method allows for user-defined data sources to be registered even if
they
+ * have the same name as an existing data source in the registry. However,
if the
+ * data source can be successfully loaded and is not a user-defined one, an
error
+ * is thrown to prevent lookup errors with built-in or Scala/Java data
sources.
+ */
+ private def checkDataSourceExists(name: String): Unit = {
+ // Allow re-registration of user-defined data sources.
+ if (dataSourceManager.dataSourceExists(name)) return
+
+ try {
+ DataSource.lookupDataSource(name, conf)
Review Comment:
I feel like we should probably scope this into runtime datasources (can be
overwritten), and static datasources (cannot be overwritten). This change
should probably be fine for now though.
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