A Pull Request should be associated with an Issue.

We wish to have discussions in Issues. A single issue may be targeted by multiple PRs.
If you're offering a new feature or fixing anything, we'd like to know beforehand in Issues,
and potentially we'll be able to point development in a particular direction.

Related issue: #1488
#1488

Further notes in https://github.com/github/gh-ost/blob/master/.github/CONTRIBUTING.md
Thank you! We are open to PRs, but please understand if for technical reasons we are unable to accept each and any PR

Description

This PR addresses the issue encountered with MariaDB 10.3 when running gh-ost version 1.1.7. The error occurs due to the use of the transaction_isolation system variable, which is not present in MariaDB 10.3. Instead, MariaDB 10.3 uses tx_isolation to configure the transaction isolation level.

In case this PR introduced Go code changes:

• contributed code is using same conventions as original code
• script/cibuild returns with no formatting errors, build errors or unit test errors.

attaching the images