Support default expression value of another field in a table

I want to match exposed schema declaration to the following sql:

alter table entry
add column entry_id uuid not null default (id); 
-- entry has a field named id

(this won’t work with raw sql but is this possible with exposed?)

But how can I do this using exposed syntax, except for defining my own custom expression? I couldn’t find ways to convert column to Expression, couldn’t do it using CustomFunction, haven’t found any other ways

[Nek-12]

Okay, I just settled on treating this functionality as impossible to implement using neither sql or orms of any kind. We can close this if we mention that this is not supported somewhere in the docs

[AlexeySoshin]

There’s clientDefault in Exposed that could work theoretically, but I don’t think would work practically.

To reference ID of a newly created row, you need to somehow obtain it first. Currently the default values are set independently from one another: https://github.com/JetBrains/Exposed/blob/9c0d2955424e3521abe025dcbdb932544aa8f3f1/exposed-core/src/main/kotlin/org/jetbrains/exposed/sql/statements/InsertStatement.kt#L95

And I don’t see any guarantees that your EntityID default value will be initialized first.