rubenada commented on code in PR #2786:
URL: https://github.com/apache/calcite/pull/2786#discussion_r863659870
##########
core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableMergeUnionRule.java:
##########
@@ -90,9 +96,42 @@ public EnumerableMergeUnionRule(Config config) {
}
}
+ final RelBuilder builder = call.builder();
final List<RelNode> inputs = new ArrayList<>(unionInputsSize);
for (RelNode input : union.getInputs()) {
- final RelNode newInput = sort.copy(sort.getTraitSet(), input, collation,
null, inputFetch);
+ // Check if type collations match, otherwise store it in this map to
generate a cast later
+ // to guarantee that all inputs will be sorted in the same way
+ final Map<Integer, RelDataType> castMap = new HashMap<>();
Review Comment:
ok, done.
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