[Feature] MergeIntoAction supports using fields that are the same as SQL keywords.

[liming30]

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• I searched in the issues and found nothing similar.

Motivation

Some tables may use SQL keywords as table fields. When executing MergeInto, we need to automatically add ` for these fields.

Solution

No response

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!