[Feature Request][Spark] Add clause/function to exclude columns during whenMatchedUpdate

[g-kannan]

Feature request

Overview

In a table with 100+ columns during update we've to manually specify in update condition to input all required columns rather excluding one or two. Eg: CREATE_TS need not be updated during update.

Motivation

It will be used in all merge scripts where specific columns to be excluded

Further details

This feature is now available in delta-rs(delta-io/delta-rs#3098). Can this be added to deltalake as well so that it can be used in Databricks too.

Willingness to contribute

The Delta Lake Community encourages new feature contributions. Would you or another member of your organization be willing to contribute an implementation of this feature?

• Yes. I can contribute this feature independently.
• [*] Yes. I would be willing to contribute this feature with guidance from the Delta Lake community.
• No. I cannot contribute this feature at this time.