support using the old schema version to get the MVCC record
Open
type/enhancement
- Dominant language
- Go
- Stars
- 40.5k
- Forks
- 6.2k
- PR merge metrics
- PR metrics pending
Description
## Enhancement
Currently, tidb only supports using the latest schema version to get the MVCC record, but the latest schema may not the desired schema, we better to support using the old schema version
Contributor guide
Research direction
Start by tracing TiDB's MVCC record retrieval and how the latest schema version is selected. Clarify how callers should provide an older schema version and define done as successfully retrieving the record using that version, with regression coverage for both old and latest schemas.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- go
- Domain
- databases, distributed-systems
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100