[IGNITE-17720] Extend MvPartitionStorage scan API with write intent resolution capabilities

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-beta1
• Labels: ignite-3
• Epic Link: MV Store
• Ignite Flags: Docs Required, Release Notes Required
• Assignee: Semyon Danilov
• Reporter: Semyon Danilov
• Reviewer: Aleksandr Polovtsev
• Created: 19/Sep/22 11:49
• Updated: 13/Oct/22 12:01
• Resolved: 30/Sep/22 10:55

Description

Commit of RW transaction is not instantaneous. RO transaction might require reads of data that's in the process of being committed. Current API doesn't support such scenario.

RO API in partition storage has only two methods: read and scan.

For read see https://issues.apache.org/jira/browse/IGNITE-17627

Scan

This one is tricky, we can't just return a cursor. Special type of cursor is required, and it must allow same read capabilities on each individual element.

API is to be defined.

Issue Links

• links to: GitHub Pull Request #1124