fix: escape single quote with backslash

[evtilley]

Currently, this extension uses the Liquibase default behavior of escaping single quotes with ''. This change overrides that behavior to use \' instead.

Fixes #94.

[mescanne]

Evtilley - thanks for this. It looks like the right thing to do, replacing the default JDBC escape method which works differently.

It would be good to add a test for it. I was working with it and our loadData changeset uses usePreparedStatements: true and it handles ' characters just fine. Could you try your test with usePreparedStatements: true?

We should still fix this, but I'd like a test that shows it working. We can duplicate the existing loadData test or create a simpler one based on your test case.

[evtilley]

Thanks @mescanne . Using prepared statements will avoid this issue.

I took a shot at writing a unit test, and it turns out that this behavior can't be reproduced using liquibase-core 4.3.1, which this project currently uses. It can be reproduced in 4.3.2, which changes the logic that decides when to use prepared statements (see this commit).

Should I take on the dependency upgrade in this PR?

[mescanne]

Go for it. It isn't clear to me the intent behind that commit -- regardless, this is focused on the string escape logic, so if we can get a minimal test for the escape string we'll be good. We can upgrade to 4.3.2 if it helps reproduce it.

[mescanne]

Great job! Do you need a release for this? Or just use prepared statements for now, and this will roll into the next release.

[evtilley]

Thanks @mescanne! Yes, please create a release.