FlyingZC opened a new pull request, #39776:
URL: https://github.com/apache/shardingsphere/pull/39776
Changes proposed in this pull request:
- Add `LiteralExpressionSegment#isNullLiteral()` while preserving the
existing semantic value and text contracts.
- Handle SQL NULL literals in projection labels, ORDER BY/GROUP BY items,
pagination contexts, and SQL Federation conversion without changing numeric
ordinal handling.
- Add focused unit tests and parser integration cases for MySQL,
PostgreSQL, openGauss, Oracle, SQLServer, and ClickHouse.
---
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- [x] My code follows the [code of
conduct](https://shardingsphere.apache.org/community/en/involved/conduct/code/)
of this project.
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- [ ] I have (or in comment I request) added corresponding labels for the
pull request.
- [ ] I have passed the full maven check locally: `./mvnw clean install -B
-T1C -Dmaven.javadoc.skip -Dmaven.jacoco.skip -e`.
- [ ] I have made corresponding changes to the documentation. No user-facing
documentation change is required for this parser bug fix.
- [x] I have added corresponding unit tests for my changes.
- [ ] I have updated the Release Notes of the current development version.
- [x] I have disclosed the tool and affected files or scope for material AI
assistance.
AI assistance disclosure: OpenAI Codex materially assisted with adapting and
testing the SQL NULL literal handling changes across the 22 production,
unit-test, and parser-test files in this pull request. I reviewed the resulting
code, scope, and verification results.
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