Adds support of quotedNulls in CSV handling

[ctabin]

Adds support for quotedNulls option in CSVREAD and CSVWRITE functions (see here) and reestablish previous behavior of CSV handling prior to 2.2.220.

This should fix the breaking change introduced by #3786 and extends its feature since with this PR the handling of the nullString in CSV can be more finely adjusted.

[sonatype-lift]

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📖 Read about the impacts and timeline

[sonatype-lift]

🛠 Lift Auto-fix

Some of the Lift findings in this PR can be automatically fixed. You can download and apply these changes in your local project directory of your branch to review the suggestions before committing.¹

# Download the patch
curl https://lift.sonatype.com/api/patch/github.com/h2database/h2database/3842.diff -o lift-autofixes.diff

# Apply the patch with git
git apply lift-autofixes.diff

# Review the changes
git diff

Want it all in a single command? Open a terminal in your project's directory and copy and paste the following command:

curl https://lift.sonatype.com/api/patch/github.com/h2database/h2database/3842.diff | git apply

Once you're satisfied, commit and push your changes in your project.

Footnotes

1. You can preview the patch by opening the patch URL in the browser. ↩

[katzyn]

Thank you for your contribution!

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[ctabin]

Hi @katzyn,

Thanks for the review, I think I handled all your feedbacks. Tell me if I need to change anything else.
Since I already contributed (see #2225), you should already have the license agreement.

[katzyn]

Hi @katzyn,

Thanks for the review, I think I handled all your feedbacks. Tell me if I need to change anything else. Since I already contributed (see #2225), you should already have the license agreement.

I see. I was confused by First-time contributor label.

[ctabin]

Hi @katzyn,
Since this PR fixes a breaking change in 2.2.220, would it be possible to have a minor release soon ?
Thanks for the merge.

[katzyn]

I think we need to wait a few weeks more, maybe there are other not yet reported regressions.