fix(sqlparser): array of struct of struct

[xiangjinwu]

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What's changed and what's your intention?

When parsing >>[], whose token stream contains [ShiftRight, LBracket, RBracket], the parser first consumes ShiftRight and sets internal state remaining_close = true. At this stage, it shall consider the next token as effectively Gt rather than peeking at LBracket from the stream. In the latter case it would be wrongly parsed as >[]>

dot

Limitations:

• Ideally all places peeking from stream need to check remaining_close first as if it was the next token. But I cannot find a good way to ensure such a virtual stream is followed (mutating input stream is not an option as it breaks backtrack and location reporting). The current fix only applies to array syntax [] as suffix. Hopefully no future syntax extensions hit the same problem.

Checklist

• [ ] I have written necessary rustdoc comments
• [x] I have added necessary unit tests and integration tests
• [ ] I have added test labels as necessary. See details.
• [ ] I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features #7934).
• [x] My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• [x] All checks passed in ./risedev check (or alias, ./risedev c)
• [ ] My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)
• [x] My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

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Release note

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[xxchan]

dot

Curious how did you generated this graph and what did you use it for? :eyes:

[xiangjinwu]

dot

Curious how did you generated this graph and what did you use it for? 👀

• Generated manually ...
• Used it to understand the indirect recursion, specially how parsing of >>[] became >[]>.