zstan commented on a change in pull request #9143:
URL: https://github.com/apache/ignite/pull/9143#discussion_r659914520
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File path:
modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/rel/IgniteMergeJoin.java
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@@ -173,24 +184,34 @@ else if (isPrefix(rightCollation.getKeys(),
joinInfo.rightKeys))// preserve righ
Map<Integer, Integer> rightToLeft = joinInfo.pairs().stream()
.collect(Collectors.toMap(p -> p.target, p -> p.source));
- List<Integer> collationLeftPrj = new ArrayList<>();
+ List<Integer> collationLeftPrj = new
ArrayList<>(collation.getKeys().size());
for (Integer c : collation.getKeys()) {
collationLeftPrj.add(
c >= rightOff ? rightToLeft.get(c - rightOff) : c
Review comment:
i extend tests but have no reproducer for this assumption ...
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