morrySnow opened a new pull request, #66951:
URL: https://github.com/apache/doris/pull/66951
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: The `primaryExpression` rule encoded CASE and CONVERT
branches with repeated prefixes, split query and expression parentheses into
competing alternatives, and represented array access, dereference, and COLLATE
through direct left recursion. This change factors the rule into a primary base
plus ordered postfix suffixes, consolidates the shared prefixes, and folds
suffixes left-to-right in the FE visitor. It preserves SQL AST semantics,
invalid-input positions, and Create View source intervals while allowing the
independent parser CST to change.
### Release note
None
### Check List (For Author)
- Test
- [ ] Regression test
- [x] Unit Test
- [ ] Manual test
- [ ] No need to test or manual test
- `./run-fe-ut.sh --run
org.apache.doris.sqlparser.DorisSqlParserTest,org.apache.doris.sqlparser.PrimaryExpressionTest,org.apache.doris.nereids.parser.PrimaryExpressionAstTest,org.apache.doris.nereids.parser.NereidsParserTest,org.apache.doris.nereids.trees.expressions.ExpressionParserTest,org.apache.doris.nereids.parser.LimitClauseTest`
- `mvn checkstyle:check -pl fe-core,fe-sql-parser`
- `DISABLE_BUILD_UI=ON MVN_OPT=-Dmaven.build.cache.enabled=false
./build.sh --fe --output <fresh-output-dir>`
- Behavior changed:
- [x] No.
- [ ] Yes.
- Does this need documentation?
- [x] No.
- [ ] Yes.
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