[CASSANDRA-16936] Support atomic addition and append for LWTs

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 4.1-alpha1, 4.1
• Component/s: Feature/Lightweight Transactions
• Change Category: Semantic
• Complexity: Normal
• Platform: All

Source Control Link

951d72cd929d1f6c9329becbdd7604a9e709587b

Test and Documentation Plan

Upcoming in simulator

• Assignee: Benedict Elliott Smith
• Reporter: Benedict Elliott Smith

Authors

Benedict Elliott Smith, Caleb Rackliffe, Sam Tunnicliffe

Reviewers

Sam Tunnicliffe

• Created: 08/Sep/21 17:56
• Updated: 27/May/22 19:25
• Resolved: 22/Nov/21 11:52

Description

To support CEP-10 we require some atomic functionality that modifies the state of a register as part of the transaction. Specifically, we require at least the ability to append a string to another string. Since this is more widely useful, at the same time we also support addition on numeric fields so that users may maintain precise counters using Paxos, should they wish.

Issue Links

• is a child of: CASSANDRA-17008 CEP-10: Simulator