From #2276, when running the test suite against mysql 8.4, saw the following test errors:
1) Test\Phinx\Db\Adapter\MysqlAdapterTest::testDropForeignKeyByNonExistentKeyColumns with data set #0 (array('ref_table_id'))
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 'table_ibfk_1' in the referenced table 'ref_table'
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:202
/home/runner/work/phinx/phinx/src/Phinx/Db/Util/AlterInstructions.php:109
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:692
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:10[67](https://github.com/cakephp/phinx/actions/runs/9161376419/job/25186080392?pr=2276#step:14:68)
/home/runner/work/phinx/phinx/src/Phinx/Db/Plan/Plan.php:152
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:722
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:618
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:[69](https://github.com/cakephp/phinx/actions/runs/9161376419/job/25186080392?pr=2276#step:14:70)1
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1810
2) Test\Phinx\Db\Adapter\MysqlAdapterTest::testDropForeignKeyByNonExistentKeyColumns with data set #1 (array('ref_table_field1'))
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 'table_ibfk_1' in the referenced table 'ref_table'
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:202
/home/runner/work/phinx/phinx/src/Phinx/Db/Util/AlterInstructions.php:109
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:692
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:1067
/home/runner/work/phinx/phinx/src/Phinx/Db/Plan/Plan.php:152
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:[72](https://github.com/cakephp/phinx/actions/runs/9161376419/job/25186080392?pr=2276#step:14:73)2
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:618
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:691
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1810
3) Test\Phinx\Db\Adapter\MysqlAdapterTest::testDropForeignKeyByNonExistentKeyColumns with data set #2 (array('ref_table_field1', 'ref_table_id'))
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 'table_ibfk_1' in the referenced table 'ref_table'
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:202
/home/runner/work/phinx/phinx/src/Phinx/Db/Util/AlterInstructions.php:109
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:692
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:1067
/home/runner/work/phinx/phinx/src/Phinx/Db/Plan/Plan.php:152
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:722
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:618
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:691
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1[81](https://github.com/cakephp/phinx/actions/runs/9161376419/job/25186080392?pr=2276#step:14:82)0
4) Test\Phinx\Db\Adapter\MysqlAdapterTest::testDropForeignKeyByNonExistentKeyColumns with data set #3 (array('non_existent_column'))
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 'table_ibfk_1' in the referenced table 'ref_table'
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:202
/home/runner/work/phinx/phinx/src/Phinx/Db/Util/AlterInstructions.php:109
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:692
/home/runner/work/phinx/phinx/src/Phinx/Db/Adapter/PdoAdapter.php:1067
/home/runner/work/phinx/phinx/src/Phinx/Db/Plan/Plan.php:152
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:722
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:618
/home/runner/work/phinx/phinx/src/Phinx/Db/Table.php:691
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1810
5) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #3 ('create table t(a int, foreign...er(a))', 'a', true)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1[88](https://github.com/cakephp/phinx/actions/runs/9161376419/job/25186080392?pr=2276#step:14:89)8
6) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #4 ('create table t(a int, foreign...er(b))', 'a', true)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
7) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #5 ('create table t(a int, foreign...er(b))', array('a'), true)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
8) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #6 ('create table t(a int, foreign...er(b))', array('a', 'a'), false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
9) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #7 ('create table t(a int, foreign...er(a))', 'a', true)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
10) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #8 ('create table t(a int, b int, ...(a,b))', 'a', false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
11) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #9 ('create table t(a int, b int, ...(a,b))', array('a', 'b'), true)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
12) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #10 ('create table t(a int, b int, ...(a,b))', array('b', 'a'), false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
13) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #11 ('create table t(a int, `B` int...(a,b))', array('a', 'b'), true)
PDOException: SQLSTATE[HY000]: General error: 6[125](https://github.com/cakephp/phinx/actions/runs/9161376419/job/25186080392?pr=2276#step:14:126) Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
14) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #12 ('create table t(a int, b int, ...(a,b))', array('a', 'B'), true)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
15) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #13 ('create table t(a int, b int, ...,b,c))', array('a', 'b'), false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
16) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #14 ('create table t(a int, foreign...er(a))', array('a', 'b'), false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
17) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #15 ('create table t(a int, b int, ...er(b))', array('a', 'b'), false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
18) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #16 ('create table t(a int, b int, ...er(b))', array('a', 'b'), false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
19) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #17 ('create table t(`0` int, forei...er(a))', '0', true)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
20) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #18 ('create table t(`0` int, forei...er(a))', '0e0', false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
21) Test\Phinx\Db\Adapter\MysqlAdapterTest::testHasForeignKey with data set #19 ('create table t(`0e0` int, for...er(a))', '0', false)
PDOException: SQLSTATE[HY000]: General error: 6125 Failed to add the foreign key constraint. Missing unique key for constraint 't_ibfk_1' in the referenced table 'other'
/home/runner/work/phinx/phinx/tests/Phinx/Db/Adapter/MysqlAdapterTest.php:1888
Need to investigate and potentially have a fix for whatever changed in mysql.
From #2276, when running the test suite against mysql 8.4, saw the following test errors:
Need to investigate and potentially have a fix for whatever changed in mysql.