Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16417#discussion_r94721694
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
---
@@ -92,46 +89,53 @@ object GenerateUnsafeProjection extends
CodeGenerator[Seq[Expression], UnsafePro
s"$rowWriter.reset();"
}
- val writeFields = inputs.zip(inputTypes).zipWithIndex.map {
- case ((input, dataType), index) =>
+ val writeFields = inputs.zip(inputsTypeAndNullable).zipWithIndex.map {
+ case ((input, (dataType, nullable)), index) =>
val dt = dataType match {
case udt: UserDefinedType[_] => udt.sqlType
case other => other
}
val tmpCursor = ctx.freshName("tmpCursor")
val setNull = dt match {
- case t: DecimalType if t.precision > Decimal.MAX_LONG_DIGITS =>
- // Can't call setNullAt() for DecimalType with precision
larger than 18.
- s"$rowWriter.write($index, (Decimal) null, ${t.precision},
${t.scale});"
+ case dt if UnsafeRow.isMutable(dt) &&
!UnsafeRow.isFixedLength(dt) =>
+ def varLenDataSize(s: DataType): Int = s match {
--- End diff --
Is it good to put this `varLenDataSize` into `UnsafeRow`? Writing a
constant like 16 here makes the code untraceable for new comers.
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