Hi, Richard Guo <[email protected]> 于2026年11月7日周六 10:21写道： > > To fix, I think we can build the fields with expandNSItemVars() > instead. It yields the same Vars, but also marks them with > markNullableIfNeeded(), as scanNSItemForColumn() does for a plain > reference such as x.a.
Using expandNSItemVars() looks right to me: it adds the required nullingrels and expands only the USING alias's columns, so the truncation is no longer needed. The patch looks good to me. -- Thanks, Tender Wang
