Fix MySQL 8.0.40+ query evaluation and test baseline updates

[Copilot]

MySQL 8.0.40+ now evaluates certain queries server-side that were previously client-evaluated or failed, causing test failures. This PR fixes two types of issues:

1. Tests expecting empty SQL logs now fail with "Assert.Empty() Failure: Collection was not empty"
2. Tests expecting query failures now pass successfully, requiring updated baselines

Changes

Updated 6 test methods across 2 test files:

In NorthwindMiscellaneousQueryMySqlTest.cs (5 tests):

• SelectMany_correlated_subquery_hard - LATERAL joins with nested subqueries and DISTINCT
• Select_subquery_recursive_trivial - Recursive LATERAL join across employees table
• Select_correlated_subquery_ordered - Paginated LATERAL join with ORDER BY
• DefaultIfEmpty_in_subquery_nested_filter_order_comparison - Complex CROSS JOIN with nested LEFT JOIN and LATERAL
• SelectMany_correlated_with_Select_value_type_and_DefaultIfEmpty_in_selector - COALESCE with LATERAL join

In ComplexNavigationsQueryMySqlTest.cs (1 test):

• Nested_SelectMany_correlated_with_join_table_correctly_translated_to_apply - Query now works correctly (no exception thrown). Updated SQL baseline to reflect new query structure with JOIN LATERAL and additional nested subqueries for DefaultIfEmpty handling.

Example SQL

Example of generated SQL now being validated:

SELECT `c1`.`City` AS `c1`, `e0`.`City`, `e0`.`c1`
FROM (
    SELECT DISTINCT `c0`.`City`
    FROM (
        SELECT `c`.`City`
        FROM `Customers` AS `c`
        LIMIT @p
    ) AS `c0`
) AS `c1`
JOIN LATERAL (
    SELECT `e`.`City`, `c1`.`City` AS `c1`
    FROM `Employees` AS `e`
    WHERE (`c1`.`City` = `e`.`City`) OR (`c1`.`City` IS NULL AND (`e`.`City` IS NULL))
    LIMIT 9
) AS `e0` ON TRUE

Compatibility

MariaDB continues to work as these queries remain client-evaluated there.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Assert.Empty() Failure: Collection was not empty</issue_title>
<issue_description>MySQL 8.0.40+ fails with this error, but works in all mariadb verisons

 Failed Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.SelectMany_correlated_subquery_hard(async: False) [562 ms]
  Error Message:
   Assert.Empty() Failure: Collection was not empty
Collection: ["@p='91'\n\nSELECT `c1`.`City` AS `c1`, `e0`.`City`"···]
  Stack Trace:
     at Microsoft.EntityFrameworkCore.TestUtilities.TestSqlLoggerFactory.AssertBaseline(String[] expected, Boolean assertOrder, Boolean forUpdate)
   at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.AssertSql(String[] expected) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/NorthwindMiscellaneousQueryMySqlTest.cs:line 7310
   at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.SelectMany_correlated_subquery_hard(Boolean async) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/NorthwindMiscellaneousQueryMySqlTest.cs:line 2777
--- End of stack trace from previous location ---

Error: Assert.Empty() Failure: Collection was not empty
Collection: ["@p='91'\n\nSELECT `c1`.`City` AS `c1`, `e0`.`City`"···]

 Failed Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.SelectMany_correlated_subquery_hard(async: True) [527 ms]
 Error Message:
  Assert.Empty() Failure: Collection was not empty
Collection: ["@p='91'\n\nSELECT `c1`.`City` AS `c1`, `e0`.`City`"···]
 Stack Trace:
    at Microsoft.EntityFrameworkCore.TestUtilities.TestSqlLoggerFactory.AssertBaseline(String[] expected, Boolean assertOrder, Boolean forUpdate)
  at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.AssertSql(String[] expected) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/NorthwindMiscellaneousQueryMySqlTest.cs:line 7310
  at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.SelectMany_correlated_subquery_hard(Boolean async) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/NorthwindMiscellaneousQueryMySqlTest.cs:line 2777
--- End of stack trace from previous location ---

Failed Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.Select_subquery_recursive_trivial(async: False) [1 s]
 Error Message:
  Assert.Empty() Failure: Collection was not empty
Collection: ["SELECT `e`.`EmployeeID`, `s`.`EmployeeID`, `s`.`Em"···]
 Stack Trace:
    at Microsoft.EntityFrameworkCore.TestUtilities.TestSqlLoggerFactory.AssertBaseline(String[] expected, Boolean assertOrder, Boolean forUpdate)
  at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.AssertSql(String[] expected) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/NorthwindMiscellaneousQueryMySqlTest.cs:line 7310
  at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.Select_subquery_recursive_trivial(Boolean async) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/NorthwindMiscellaneousQueryMySqlTest.cs:line 2207
--- End of stack trace from previous location ---

  Failed Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.Select_correlated_subquery_ordered(async: True) [213 ms]
  Error Message:
   Assert.Empty() Failure: Collection was not empty
Collection: ["@p='3'\n\nSELECT `c0`.`CustomerID`, `o0`.`OrderID`"···]
  Stack Trace:
     at Microsoft.EntityFrameworkCore.TestUtilities.TestSqlLoggerFactory.AssertBaseline(String[] expected, Boolean assertOrder, Boolean forUpdate)
   at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.AssertSql(String[] expected) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/NorthwindMiscellaneousQueryMySqlTest.cs:line 7310
   at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.NorthwindMiscellaneousQueryMySqlTest.Select_correlated_subquery_ordered(Boolean async) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/NorthwindMiscellaneousQueryMySqlTest.cs:line 2168
--- End of stack trace from previous location ---
```</issue_description>

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</details>



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- Fixes microting/Pomelo.EntityFrameworkCore.MySql#231

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[renemadsen]

@copilot We have this error for mysql version >= 8.0.40:
Failed Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.ComplexNavigationsQueryMySqlTest.Nested_SelectMany_correlated_with_join_table_correctly_translated_to_apply(async: True) [198 ms]
Error Message:
Assert.Throws() Failure: No exception was thrown
Expected: typeof(Xunit.Sdk.EqualException)
Stack Trace:
at Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.ComplexNavigationsQueryMySqlTest.Nested_SelectMany_correlated_with_join_table_correctly_translated_to_apply(Boolean async) in /home/runner/work/Pomelo.EntityFrameworkCore.MySql/Pomelo.EntityFrameworkCore.MySql/test/EFCore.MySql.FunctionalTests/Query/ComplexNavigationsQueryMySqlTest.cs:line 79
--- End of stack trace from previous location ---

[Copilot]

@copilot We have this error for mysql version >= 8.0.40:
Failed Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query.ComplexNavigationsQueryMySqlTest.Nested_SelectMany_correlated_with_join_table_co...

Fixed in commit 3108617. The query now works correctly in MySQL 8.0.40+ (no exception thrown) and the SQL baseline has been updated to match the new query structure that uses JOIN LATERAL with additional nested subqueries for DefaultIfEmpty handling.