rusackas opened a new pull request, #42733:
URL: https://github.com/apache/superset/pull/42733

   ### SUMMARY
   Regression test for #38189, which reported that Superset's SQL parser 
injects a repositioned `--` comment inside a `/*+ SET_VAR(...) */` optimizer 
hint block, producing invalid SQL for StarRocks/MySQL-style engines that use 
the `/*+ ... */` hint convention.
   
   This doesn't reproduce against the actual execution-time code path: 
`SQLStatement.format()`, the same method `superset/sql/execution/executor.py` 
and `superset/sql/execution/celery_task.py` call to build the SQL that's 
actually sent to the engine. With the currently pinned `sqlglot` 30.12.0, the 
trailing `--` comment is repositioned safely after the statement, not injected 
inside the hint block.
   
   Passes on current `master` — closes #38189 as already fixed (likely by a 
`sqlglot` version bump since the report; exact version isn't pinned down here 
since it's not needed to confirm the current state).
   
   ### TESTING INSTRUCTIONS
   ```
   pytest tests/unit_tests/sql/parse_tests.py -k 
test_sqlscript_format_preserves_optimizer_hint_block
   ```
   
   ### ADDITIONAL INFORMATION
   - [x] Has associated issue: #38189
   - [ ] Required feature flags:
   - [ ] Changes UI
   - [ ] Includes DB Migration
   - [ ] Introduces new feature or API
   - [ ] Removes existing feature or API


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