finchxxia opened a new pull request, #2380:
URL: https://github.com/apache/datafusion-sqlparser-rs/pull/2380
## Summary
Adds Doris SQL dialect support to close #2379
This PR introduces `DorisDialect` and parser/AST support for common Doris
SQL syntax, especially Doris `CREATE TABLE` clauses, partition/distribution
definitions, table properties, Doris column options, and Doris load statements.
## Changes
- Add `DorisDialect`
- backtick-delimited identifiers
- Doris-style identifiers
- backslash string escapes
- Doris-specific parser capability gates
- Add Doris `CREATE TABLE` support
- `ENGINE = OLAP`
- `DUPLICATE KEY`, `UNIQUE KEY`, `AGGREGATE KEY`
- table-level `COMMENT`
- `PARTITION BY RANGE/LIST`
- `AUTO PARTITION`
- partition values including `MAXVALUE` / `MAX_VALUE`
- fixed and batch range partitions
- `DISTRIBUTED BY HASH/RANDOM`
- `BUCKETS <n>` and `BUCKETS AUTO`
- `PROPERTIES (...)`
- Add Doris AST structures
- key model
- partition model
- distribution model
- bucket declarations
- Doris load statements
- Add Doris-specific statement parsing
- `LOAD DATA INFILE`
- `CREATE ROUTINE LOAD`
- Extend tests
- Doris round-trip parser tests
- structured AST assertions
- generic/ANSI rejection cases for Doris-only syntax
- table comment escaping
- compatibility checks for surrounding dialect behavior
## Testing
```bash
cargo fmt --check
cargo test --test sqlparser_doris
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