cloud-fan commented on a change in pull request #24721: [SPARK-27856][SQL] do
not forcibly add cast when inserting table
URL: https://github.com/apache/spark/pull/24721#discussion_r288421910
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
##########
@@ -1777,6 +1777,12 @@ object SQLConf {
.doc("When true, the upcast will be loose and allows string to atomic
types.")
.booleanConf
.createWithDefault(false)
+
+ val LEGACY_INSERT_TABLE_FORCIBLE_CAST =
buildConf("spark.sql.legacy.insertTable.forcibleCast")
+ .doc("When inserting data to a table, Spark will cast the data type of
input query to " +
Review comment:
CTAS does not have this problem because the table is not created yet, so
there is no type mismatch issue.
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