Github user windpiger commented on the issue:
https://github.com/apache/spark/pull/16545
thanks!
val df = spark.read.json("/path/jsonfile")
val df1 = spark.read.json("/path/jsonfile_1")
df.createOrReplaceTempView("t")
df1.createOrReplaceTempView("t1")
spark.sql("insert overwrite table t select * from t1")
this sql executed will hit the function `deleteMatchingPartitions` here
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/InsertIntoHadoopFsRelationCommand.scala#L104
while `/path/jsonfile` is `not` a partition path file,
`deleteMatchingPartitions` is not properly here?
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