Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/11636#discussion_r56567171
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
---
@@ -199,7 +210,8 @@ class CodegenContext {
case StringType => s"$input.getUTF8String($ordinal)"
case BinaryType => s"$input.getBinary($ordinal)"
case CalendarIntervalType => s"$input.getInterval($ordinal)"
- case t: StructType => s"$input.getStruct($ordinal, ${t.size})"
+ case t: StructType => if (!isColumnarType(input)) {
s"$input.getStruct($ordinal, ${t.size})" }
--- End diff --
While this ```getStruct()``` for ```ColumnVector``` may not be called at
rutnime now, a code generator always produces two version for ```InternalRow```
and ```ColumnVector```.
Thus, this code is necessary to avoid compilation error for now. In the
future, this code is necessary to correctly handle nested types.
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