pravindra commented on a change in pull request #7106:
URL: https://github.com/apache/arrow/pull/7106#discussion_r420070789
##########
File path: java/vector/src/main/codegen/templates/UnionListWriter.java
##########
@@ -180,7 +180,7 @@ public void write(DecimalHolder holder) {
@Override
public void writeNull() {
- writer.setPosition(writer.idx()+1);
Review comment:
can you please add a check here
if (writer.idx() >= (idx() + 1) * listSize) {
throw new IllegalStateException(String.format("values at index %s is
greater than listSize %s", idx(), listSize));
}
##########
File path: java/vector/src/main/codegen/templates/StructWriters.java
##########
@@ -196,6 +196,15 @@ public void setPosition(int index) {
}
}
+ <#if mode="Nullable">
+ @Override
+ public void writeNull() {
+ container.setNull(idx());
+ setValueCount(idx()+1);
Review comment:
is the setValueCount required ? it should be done after all mutations
to the vector are done.
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