libenchao commented on code in PR #2889:
URL: https://github.com/apache/calcite/pull/2889#discussion_r984672791
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core/src/main/java/org/apache/calcite/rel/type/RelCrossType.java:
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@@ -58,6 +58,15 @@ public RelCrossType(
return false;
}
+ /**
+ * Returns the contained types.
+ *
+ * @return Data types.
+ */
+ public ImmutableList<RelDataType> getTypes() {
Review Comment:
Is `ImmutableList<RelDataType>` too specific? How about `List<RelDataType>`?
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