xiedeyantu commented on code in PR #4759:
URL: https://github.com/apache/calcite/pull/4759#discussion_r2714614358
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core/src/test/resources/sql/new-decorr.iq:
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@@ -169,4 +169,40 @@ EnumerableCalc(expr#0..7=[{inputs}],
expr#8=[CAST($t7):INTEGER], expr#9=[10], ex
!plan
!}
+# # This case comes from scalar.iq [CALCITE-709]
+# Aggregate functions do not support type promotion, so a cast is added to
pass the test.
Review Comment:
Type promotion is intended to express that when column 'a' is 'int', the
sum(a) type will be inferred as bigint in other databases, thus promoting the
type and avoiding out-of-bounds errors.
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