Fixed value of columns not updating in ui_bookmark table

[gelanivishal]

Description (*)

There was data type issue in ui_bookmark table.

Fixed Issues (if relevant)

1. Value of created_at and updated_at columns not updating in ui_bookmark table #18557: Value of created_at and updated_at columns not updating in ui_bookmark table

Manual testing scenarios (*)

1. Check phpmyadmin and go to ui_bookmark table

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @gelanivishal. Thank you for your contribution
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[slavvka]

hey @gelanivishal Thank you for the contribution but such a change is backward incompatible (look https://devdocs.magento.com/guides/v2.2/contributor-guide/backward-compatible-development/#db-schema). Also this solution doesn't work for existing installations. Please consider creating you PR to 2.3 where Declarative Scheme was introduced (https://devdocs.magento.com/guides/v2.3/extension-dev-guide/declarative-schema/)

[gelanivishal]

@slavvka Check new PR #18699 for this issue.