changsun20 commented on PR #15696:
URL: https://github.com/apache/datafusion/pull/15696#issuecomment-2799781696
Hi @eliaperantoni,
Thank you for your patience and guidance throughout this issue. I've
implemented the core functionality per our discussions, but would like to
confirm a few implementation details:
1. **Predicate Context Validation**
The warning detection is integrated during `BinaryExpr` processing,
which should naturally limit it to predicate contexts. Statements like `UPDATE
users SET password = NULL` won't trigger false warnings by default. Could you
confirm this approach is acceptable?
2. **Span Handling Strategy**
In usual cases, the left operand is an `Identifier`. The current
implementation combines the identifier's left span with NULL's right span for
precise highlighting. For rare non-identifier cases (e.g., some complex
expressions that I can't immediately come up with one right now), we fall back
to using just the NULL span. This balances precision with robustness.
3. **Test Coverage Request**
While I've added tests for basic and multiple `= NULL` cases, could you
suggest any edge cases or additional scenarios that should be validated?
I appreciate your expertise in reviewing these implementation choices.
Please let me know if any adjustments are needed.
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