rubenada commented on a change in pull request #2194:
URL: https://github.com/apache/calcite/pull/2194#discussion_r501518483
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File path: core/src/main/java/org/apache/calcite/rel/metadata/RelMdUtil.java
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@@ -872,23 +872,36 @@ public static boolean
checkInputForCollationAndLimit(RelMetadataQuery mq,
RelNode input, RelCollation collation, RexNode offset, RexNode fetch) {
// Check if the input is already sorted
boolean alreadySorted = collation.getFieldCollations().isEmpty();
- for (RelCollation inputCollation : mq.collations(input)) {
- if (inputCollation.satisfies(collation)) {
- alreadySorted = true;
- break;
+ if (!alreadySorted) {
+ final ImmutableList<RelCollation> collations = mq.collations(input);
+ if (collations != null) {
Review comment:
Changed
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