vvysotskyi commented on a change in pull request #1614: DRILL-6962: Function
coalesce returns an Error when none of the columns in coalesce exist in a
parquet file
URL: https://github.com/apache/drill/pull/1614#discussion_r249408443
##########
File path:
exec/vector/src/main/java/org/apache/drill/exec/vector/UntypedNullVector.java
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@@ -125,7 +124,9 @@ public TransferPair makeTransferPair(ValueVector to) {
return new TransferImpl((UntypedNullVector) to);
}
- public void transferTo(UntypedNullVector target) { }
+ public void transferTo(UntypedNullVector target) {
+ target.valueCount = valueCount;
Review comment:
Please also set `this.valueCount = 0;` here or add it to `reset()` method
and call it from this one.
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