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_r292077331
##########
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(
- insert.query, expectedColumns, conf)
+ val newQuery = if
(conf.getConf(SQLConf.LEGACY_INSERT_TABLE_TYPE_COERCION)) {
+ DDLPreprocessingUtils.castAndRenameQueryOutput(insert.query,
expectedColumns, conf)
+ } else {
+ val errors = new mutable.ArrayBuffer[String]()
Review comment:
I check and I think it is workable. I will try moving it into the
`ResolveOutputRelation` rule.
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