Hi, During insertion when passing value as null it is taking as default string value "null" but while updating its not reflecting@Mayank Eg: Insert: "xyz": null -------------> "xyz" : "null" Update: "xyz": "abc" to "xyz": null -------------------> No change (Expected: "xyz" : "null")

Are you upserting

xyz

from

null

to

abc

? Your description states it is being updated to null, so it is confusing.

When I'm trying to update "xyz": "abc" to null it is not updating as "xyz": "null"

With partial upsert, nulls are not updated. You will need full upsert for this

Can't we make to default value if the updated value is null?

That is how partial upsert works. It ignores the nulls. If you want to overwrite nulls, then you are looking for full upsert.