Yaohua628 commented on code in PR #37905:
URL: https://github.com/apache/spark/pull/37905#discussion_r973821514
##########
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/FileMetadataStructSuite.scala:
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@@ -565,6 +569,34 @@ class FileMetadataStructSuite extends QueryTest with
SharedSparkSession {
sourceFileMetadata(METADATA_FILE_MODIFICATION_TIME))
)
)
+
+ // Verify self-union
+ val streamQuery1 = streamDf.union(streamDf)
+ .writeStream.format("json")
+ .option("checkpointLocation", dir.getCanonicalPath +
"/target/checkpoint_union")
+ .trigger(Trigger.AvailableNow())
+ .start(dir.getCanonicalPath + "/target/new-streaming-data-union")
+ streamQuery1.awaitTermination()
+ val df1 = spark.read.format("json")
+ .load(dir.getCanonicalPath + "/target/new-streaming-data-union")
+ // Verify self-union results
+ assert(streamQuery0.lastProgress.numInputRows == 2L)
Review Comment:
oops
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