gengliangwang commented on a change in pull request #24806: [SPARK-27856][SQL]
Only allow type upcasting when inserting table
URL: https://github.com/apache/spark/pull/24806#discussion_r292044044
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
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@@ -356,8 +358,28 @@ case class PreprocessTableInsertion(conf: SQLConf)
extends Rule[LogicalPlan] {
s"including ${staticPartCols.size} partition column(s) having
constant value(s).")
}
- val newQuery = DDLPreprocessingUtils.castAndRenameQueryOutput(
Review comment:
In `CreateTable`, it should be CTAS and the schema should be the same as the
input query. But I can't explain why the CAST is needed. I will do more
investigation.
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