asolimando commented on code in PR #3264:
URL: https://github.com/apache/calcite/pull/3264#discussion_r1229986845
##########
core/src/main/java/org/apache/calcite/rel/rules/ProjectJoinRemoveRule.java:
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@@ -127,6 +151,49 @@ public ProjectJoinRemoveRule(
call.transformTo(node);
}
+ /**
+ * Check as following:
+ * 1. Make sure that every foreign column always be foreign key.
+ * 2. The target of foreign key is the correct unique key correspondingly.
Review Comment:
Same as per the other "linguistic" comments:
```suggestion
* 2. The target of foreign key is the correct corresponding unique key.
```
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