Return old tuple in case of INSERT unique constraint violation

Registered by Kostja Osipov

When INSERTing, REPLACing or UPDATing data, and there is a unique constraint violation, make it possible to request the tuple which violated the constraint -- add a flag BOX_OLD_TUPLE for that.

Same should work for DELETE.

Blueprint information

Status:
Not started
Approver:
Kostja Osipov
Priority:
Undefined
Drafter:
None
Direction:
Needs approval
Assignee:
Konstantin Shulgin
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

Related branches

Sprints

Whiteboard

(?)

Work Items

This blueprint contains Public information 
Everyone can see this information.