Adding tests for previously fixed issues

[maumar]

Resolves #12274
Resolves #11835
Resolves #12597
Resolves #12379
Resolves #12717
Resolves #17775
Resolves #18962

[smitpatel]

#17775 was flaky and underlying issue may not be gone. Make sure to run all the tests in SqlServer functional tests multiple times to verify that it is not flaky.

[ghost]

Hello @maumar!

Because this pull request has the auto-merge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

p.s. you can customize the way I help with merging this pull request, such as holding this pull request until a specific person approves. Simply @mention me (@msftbot) and give me an instruction to get started! Learn more here.

[maumar]

@msftbot require 1 approval

[ghost]

Hello @maumar!

Because you've given me some instructions on how to help merge this pull request, I'll be modifying my merge approach. Here's how I understand your requirements for merging this pull request:

• I'll only merge this pull request if it has at least 1 approval

If this doesn't seem right to you, you can tell me to cancel these instructions and use the auto-merge policy that has been configured for this repository. Try telling me "forget everything I just told you".