snuyanzin commented on code in PR #28162:
URL: https://github.com/apache/flink/pull/28162#discussion_r3304299480
##########
flink-table/flink-table-planner/src/test/java/org/apache/flink/table/planner/plan/rules/logical/MetadataFilterInReadingMetadataTest.java:
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@@ -250,7 +324,7 @@ private static class MetadataFilterSource extends
TableFactoryHarness.ScanSource
@Override
public Map<String, DataType> listReadableMetadata() {
- Map<String, DataType> metadata = new HashMap<>();
+ Map<String, DataType> metadata = new LinkedHashMap<>();
Review Comment:
why do we need it?
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