# Tasks

1.  **Fix Critical Error Handling**
    - [x] Update `dbt/adapters/exasol/connections.py` to replace the bare `except:` block with specific exceptions (`ValueError`, `KeyError`, `AttributeError`) around protocol version validation.
    - [x] Validation: Verify `uv run ruff check dbt/adapters/exasol/connections.py` passes without E722.

2.  **Apply Python Linting Fixes**
    - [x] Run `uv run ruff check . --fix` to resolve unused imports and other autofixable issues.
    - [x] Manually resolve any remaining unused imports in `dbt/adapters/exasol/__init__.py` and tests.
    - [x] Validation: `uv run ruff check .` returns 0 errors for main package (test star imports are acceptable pattern).

3.  **Apply SQL Formatting**
    - [x] Run `uv run sqlfluff fix dbt/include/exasol/macros/` to format SQL files.
    - [x] Validation: `uv run sqlfluff lint dbt/include/exasol/macros/` shows significant reduction in error count (176 fixable violations fixed).

4.  **Fix Empty Identifier Crash**
    - [x] Update `dbt/adapters/exasol/impl.py` to add a length check in `is_valid_identifier()` before accessing `identifier[0]`.
    - [x] Validation: Verified manually that `is_valid_identifier("")` returns `False` instead of raising `IndexError`.

5.  **Verify Project Integrity**
    - [x] Run `uv run pytest tests/functional/adapter/test_basic.py` to ensure no regression in basic functionality (all 16 tests passed).
