snuyanzin commented on code in PR #5081:
URL: https://github.com/apache/calcite/pull/5081#discussion_r3524886894
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core/src/main/java/org/apache/calcite/rel/rel2sql/SqlImplementor.java:
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@@ -1061,7 +1061,8 @@ public List<SqlNode> toSql(Window.Group group,
ImmutableList<RexLiteral> constan
partitionKeys.add(this.field(partition));
}
for (RelFieldCollation collation : group.orderKeys.getFieldCollations())
{
- this.addOrderItem(orderByKeys, collation);
+ // A window ORDER BY has no ordinal notion; resolve via field().
+ this.addOrderItem(orderByKeys, collation, false);
Review Comment:
didn't get what you mean by that, can you elaborate please?
This is exactly the case covered by `testWindowOrderByExpression` in this PR
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