xy2953396112 commented on a change in pull request #1960:
URL: https://github.com/apache/calcite/pull/1960#discussion_r419509945
##########
File path:
core/src/main/java/org/apache/calcite/rel/metadata/RelMdColumnOrigins.java
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@@ -253,4 +264,24 @@ public Void visitInputRef(RexInputRef inputRef) {
}
return set;
}
+
+ private Set<RelColumnOrigin> getMultipleColumns(RexNode rexNode, RelNode
input,
+ final RelMetadataQuery mq) {
+ // Anything else is a derivation, possibly from multiple
+ // columns.
Review comment:
> This comment should be added in the caller of this method.
Thanks, update it.
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