airborne12 opened a new pull request, #60635:
URL: https://github.com/apache/doris/pull/60635
## Summary
Refactor SearchDslParser from two-phase parsing to single-phase ANTLR
parsing:
- **Eliminate hand-written preprocessing**: The previous two-phase approach
used string manipulation to preprocess DSL before ANTLR parsing, which was
mangling regex patterns like `/(\\d{1,2}:\\d{2} [AP]M)/`
- **Native bareQuery support**: Added `bareQuery` rule to ANTLR grammar to
handle terms without field prefix directly
- **Implicit conjunction**: Made `AND` optional in grammar to support
space-separated terms using `default_operator` (AND/OR)
- **Lucene mode semantics**: Added `luceneMode` parameter to multi-field
expansion for proper `OCCUR_BOOLEAN` handling
- **Preserve explicit fields**: Multi-field expansion now correctly
preserves fields not in the expansion list
## Test Plan
- [x] All 106 unit tests pass
- [x] All 18 search regression tests pass
- [x] Manual verification of regex pattern handling
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