mihaibudiu commented on code in PR #4495:
URL: https://github.com/apache/calcite/pull/4495#discussion_r2264163028
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core/src/main/java/org/apache/calcite/tools/RelBuilder.java:
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@@ -4446,8 +4531,12 @@ private class AggCallImpl implements AggCallPlus {
// return a call that is "approximately equivalent ... and is good for
// deriving field names", so dummy values are good enough.
final RelCollation collation = RelCollations.EMPTY;
- final RelDataType type =
- getTypeFactory().createSqlType(SqlTypeName.BOOLEAN);
+ final RelDataType type;
+ if (aggFunction.getKind() == SqlKind.GROUP_ID) {
+ type = getTypeFactory().createSqlType(SqlTypeName.BIGINT);
Review Comment:
Then a comment will be appropriate to point this out.
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