szehon-ho commented on code in PR #52866:
URL: https://github.com/apache/spark/pull/52866#discussion_r2501117999
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sql/core/src/test/scala/org/apache/spark/sql/connector/MergeIntoTableSuiteBase.scala:
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@@ -3510,6 +3510,527 @@ abstract class MergeIntoTableSuiteBase extends
RowLevelOperationSuiteBase
}
}
+ test("Merge schema evolution should not evolve if not directly referencing
new column: update") {
+ Seq(true, false).foreach { withSchemaEvolution =>
+ withTempView("source") {
+ createAndInitTable("pk INT NOT NULL, salary INT, dep STRING",
+ """{ "pk": 1, "salary": 100, "dep": "hr" }
+ |{ "pk": 2, "salary": 200, "dep": "software" }
+ |""".stripMargin)
+
+ val sourceDF = Seq((2, 150, "dummy", "blah"),
+ (3, 250, "dummy", "blah")).toDF("pk", "salary", "dep", "extra")
+ sourceDF.createOrReplaceTempView("source")
+
+ val schemaEvolutionClause = if (withSchemaEvolution) "WITH SCHEMA
EVOLUTION" else ""
+ val mergeStmt =
+ s"""MERGE $schemaEvolutionClause
+ |INTO $tableNameAsString t
+ |USING source s
+ |ON t.pk = s.pk
+ |WHEN MATCHED THEN
+ | UPDATE SET dep='software'
Review Comment:
discussed offline, update this case to not do schema evolution (new
restriction that it has to be a direct assignment to source column)
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