clintropolis commented on code in PR #15434:
URL: https://github.com/apache/druid/pull/15434#discussion_r1407001862
##########
processing/src/main/java/org/apache/druid/query/aggregation/any/StringAnyVectorAggregator.java:
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@@ -78,7 +84,23 @@ public void aggregate(ByteBuffer buf, int position, int
startRow, int endRow)
if (startRow < rows.length) {
IndexedInts row = rows[startRow];
@Nullable
- String foundValue = row.size() == 0 ? null :
multiValueSelector.lookupName(row.get(0));
+ String foundValue;
+ if (row.size() == 0) {
+ foundValue = null;
+ } else if (aggregateMultipleValues) {
+ if (row.size() > 1) {
+ List<String> arrayList = new ArrayList<>();
+ row.forEach(rowIndex -> {
+ String chopped =
StringUtils.fastLooseChop(multiValueSelector.lookupName(rowIndex),
maxStringBytes);
Review Comment:
that's fine i think, i don't really like the silent truncation at all
personally; i think we should probably change first/last/any to all optionally
fail instead of silently truncating results, but that doesn't need to changed
now.
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