MagnetoDB/specs/all old for put item

"ALL_OLD" return value for "put_item" method
Launchpad:

While using "put_item" request we do not have any information about presence of item with same key as we put. According to DynamoDB API we must have an ability to pass "ReturnValue": "ALL_OLD" in put_item request, so replaced item will be returned in response.

Specification status
Approved by dukhlov, isviridov

Problem Description
Feature is absent in MagnetoDB

Proposed Change
None

Alternatives
None

Security Impact
None

Notifications Impact
None

Other End User Impact
None

Performance Impact
Feature will not make performance impact to ordinary put_item request

Other Deployer Impact
None

Developer Impact
None

Implementation
None

Assignee(s)
Primary assignee: aostapenko

Other contributors: None

Work Items
None

Dependencies
None

Documentation Impact
No documentation impact