fix(sql-parsing): split MSSQL statements when previous expression ends with parentheses

[alfiyas-datahub]

Summary

• Fixed SQL statement splitter incorrectly treating closing parentheses from function calls (e.g., GETDATE()) as CTE indicators.
• The _has_preceding_cte() method now checks that the statement actually starts with WITH before assuming a CTE context.
• Added regression test for this scenario.

[github-actions]

Linear: ING-1302

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
12173	1	12172	82

View the top 1 failed test(s) by shortest run time

tests.unit.sql_parsing.test_split_statements::test_cte_with_select_not_split

Stack Traces | 0.007s run time

def test_cte_with_select_not_split():
        """
        Verify CTEs (WITH ... AS) followed by SELECT are kept together as one statement.
        This ensures the fix for parenthesis splitting doesn't break CTE handling.
        """
        test_sql = """\
        WITH temp_cte AS (
            SELECT * FROM source WHERE date > GETDATE()
        )
        SELECT * FROM temp_cte"""
    
        statements = [s.strip() for s in split_statements(test_sql)]
    
        assert len(statements) == 1
>       assert statements[0] == test_sql
E       AssertionError: assert 'WITH temp_cte AS (\n        SELECT * FROM source WHERE date > GETDATE()\n    )\n    SELECT * FROM temp_cte' == '    WITH temp_cte AS (\n        SELECT * FROM source WHERE date > GETDATE()\n    )\n    SELECT * FROM temp_cte'
E         
E         -     WITH temp_cte AS (
E         ? ----
E         + WITH temp_cte AS (
E                   SELECT * FROM source WHERE date > GETDATE()
E               )
E               SELECT * FROM temp_cte

.../unit/sql_parsing/test_split_statements.py:286: AssertionError

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[codecov]

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