Fix addColumn on mysql when including a "value" attribute

[nvoxland]

Impact

• Bug fix (non-breaking change which fixes expected existing functionality)
• Enhancement/New feature (adds functionality without impacting existing logic)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Mysql's "alter column" syntax we use to assign the final "not null" constraint to an added column will lose the defaultValue that was set earlier.

Make sure the default value gets re-applied if needed.

Issue introduced in #928
Fixes #2657

Things to be aware of

• Only impacts mysql/mariadb when one of the defaultValue is set

Things to worry about

• Do all the variations of defaultValue* work?

[github-actions]

Unit Test Results

  4 620 files  ±0    4 620 suites  ±0   39m 41s ⏱️ + 3m 21s
  4 611 tests ±0    4 396 ✔️ +4     215 💤  - 4  0 ❌ ±0 
54 504 runs  ±0  49 484 ✔️ +4  5 020 💤  - 4  0 ❌ ±0 

Results for commit d05fdfd. ± Comparison against base commit 4215cf6.

♻️ This comment has been updated with latest results.

[kataggart]

@nvoxland apologies if I moved this one around incorrectly; I saw for some reason the linked issue was in Code review, but pretty sure this PR is still in development. I put them both in development. Thanks

[FBurguer]

For this PR I did the next tests:
defaultValue tests:

1. Add column with value, defaultValue and not NULL: PASS
2. Add column without value, defaultValue and not NULL: PASS
3. Add column with value, defaultValue and nullable: PASS
4. Add column without value, defaultValue and nullable: PASS
5. Add column with value, without defaultValue and not NULL: PASS
6. Add column without value or defaultValue, with not NULL: PASS
7. Add column with value, without defaultValue and not NULL: PASS
8. Add column without value or defaultValue, and nullable: PASS

defaultValueBoolean tests

1. Add column with valueBoolean, defaultValueBoolean and not NULL: PASS
2. Add column without valueBoolean, defaultValueBoolean and not NULL: PASS
3. Add column with valueBoolean, defaultValueBoolean and nullable: PASS
4. Add column without valueBoolean, defaultValueBoolean and nullable: PASS

defaultValueComputed tests

1. Add column with valueComputed, defaultComputed and not NULL: PASS
2. Add column without valueComputed, defaultValueComputed and not NULL: PASS
3. Add column with valueComputed, defaultValueComputed and nullable: PASS
4. Add column without valueComputed, defaultValueComputed and nullable: PASS
   (Something I noticed: functionas must be used inside () when using them as a parameter for defaultValueComputed and valuecomputed)

defaultValueDate tests

1. Add column with valueDate, defaultDate and not NULL: PASS
2. Add column without valueDate, defaultValueDate and not NULL: PASS
3. Add column with valueDate, defaultValueDate and nullable: PASS
4. Add column without valueDate, defaultValueDate and nullable: PASS

defaultValueNumeric tests

1. Add column with valueDate, defaultNumeric and not NULL: PASS
2. Add column without valueDate, defaultValueNumeric and not NULL: PASS
3. Add column with valueDate, defaultValueNumeric and nullable: PASS
4. Add column without valueDate, defaultValueNumeric and nullable: PASS

Test environment:
Windows 10
Java 8
MySQL container v8.0.27