cloud-fan commented on code in PR #45612:
URL: https://github.com/apache/spark/pull/45612#discussion_r1531859481
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/AnsiTypeCoercion.scala:
##########
@@ -180,37 +180,18 @@ object AnsiTypeCoercion extends TypeCoercionBase {
// cast the input to decimal.
case (n: NumericType, DecimalType) => Some(DecimalType.forType(n))
- // Cast null type (usually from null literals) into target types
- // By default, the result type is `target.defaultConcreteType`. When the
target type is
- // `TypeCollection`, there is another branch to find the "closet
convertible data type" below.
- case (NullType, target) if !target.isInstanceOf[TypeCollection] =>
Review Comment:
This is covered by `Cast.canANSIStoreAssign`
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/AnsiTypeCoercion.scala:
##########
@@ -180,37 +180,18 @@ object AnsiTypeCoercion extends TypeCoercionBase {
// cast the input to decimal.
case (n: NumericType, DecimalType) => Some(DecimalType.forType(n))
- // Cast null type (usually from null literals) into target types
- // By default, the result type is `target.defaultConcreteType`. When the
target type is
- // `TypeCollection`, there is another branch to find the "closet
convertible data type" below.
- case (NullType, target) if !target.isInstanceOf[TypeCollection] =>
- Some(target.defaultConcreteType)
-
- // This type coercion system will allow implicit converting String type
as other
- // primitive types, in case of breaking too many existing Spark SQL
queries.
- case (StringType, a: AtomicType) =>
- Some(a)
-
- // If the target type is any Numeric type, convert the String type as
Double type.
- case (StringType, NumericType) =>
- Some(DoubleType)
-
- // If the target type is any Decimal type, convert the String type as
the default
- // Decimal type.
- case (StringType, DecimalType) =>
- Some(DecimalType.SYSTEM_DEFAULT)
-
- // If the target type is any timestamp type, convert the String type as
the default
- // Timestamp type.
- case (StringType, AnyTimestampType) =>
- Some(AnyTimestampType.defaultConcreteType)
-
- case (DateType, AnyTimestampType) =>
Review Comment:
ditto
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