sunchao commented on a change in pull request #35483:
URL: https://github.com/apache/spark/pull/35483#discussion_r804271643
##########
File path:
sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/WritableColumnVector.java
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@@ -661,21 +671,22 @@ public final int appendArray(int length) {
* common non-struct case.
*/
public final int appendStruct(boolean isNull) {
+ reserve(elementsAppended + 1);
if (isNull) {
// This is the same as appendNull but without the assertion for struct
types
- reserve(elementsAppended + 1);
putNull(elementsAppended);
- elementsAppended++;
for (WritableColumnVector c: childColumns) {
- if (c.type instanceof StructType) {
+ if (c.isStruct()) {
c.appendStruct(true);
} else {
c.appendNull();
Review comment:
`reserve` doesn't affect child columns though, it only affects `null`
and `offset` array.
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