mihailom-db commented on code in PR #45422:
URL: https://github.com/apache/spark/pull/45422#discussion_r1530992551
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/AnsiTypeCoercion.scala:
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@@ -215,6 +220,10 @@ object AnsiTypeCoercion extends TypeCoercionBase {
None
}
+ // "canANSIStoreAssign" doesn't account for targets extending
StringTypeCollated, but
+ // ANSIStoreAssign is generally expected to return "true" for
(AtomicType, StringType)
+ case (_: AtomicType, _: StringTypeCollated) => Some(StringType)
Review Comment:
Yes it is. canANSIStoreAssign has a rule for casting AtomicType to
StringType, but since StringTypeCollated does not extend StringType, but only
AbstractDataType, this cast rule will not be picked up. But I would say this
rule has to be improved to check for all canANsiStoreAssign rules.
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