cloud-fan commented on code in PR #51373:
URL: https://github.com/apache/spark/pull/51373#discussion_r2184533766
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/InMemoryCatalog.scala:
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@@ -331,6 +331,21 @@ class InMemoryCatalog(
catalog(db).tables(table).table = origTable.copy(schema = newSchema)
}
+ override def alterTableSchema(
+ db: String,
+ table: String,
+ newSchema: StructType): Unit = synchronized {
+ requireTableExists(db, table)
+ val origTable = catalog(db).tables(table).table
+
+ val partCols = origTable.partitionColumnNames
+ assert(newSchema.map(_.name).takeRight(partCols.length) == partCols,
+ s"Partition columns ${partCols.mkString("[", ", ", "]")} are only
supported at the end of " +
Review Comment:
why do we need to have this limitation?
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