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Version

master

What's Wrong?

see issue #17587, it's caused by coalesce function. e.g. app_id = coalesce(appid, "")
coalesce returned an new result column, which holds a reference to another original column in schema. The new result column is inserted into a dest column, and src block cleared the original column's data, the result column's data is cleared as well.

What You Expected?

coalesce should return a copied column

How to Reproduce?

No response

Anything Else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

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