Closed evenyag closed 3 weeks ago
@coderabbitai review
The recent changes in the codebase focus on improving the deduplication process for sorted data batches. New strategies and structures were introduced to handle duplicate rows more efficiently, including mechanisms for filtering deleted rows and updating various metrics. Enhancements also include updating essential components to ensure seamless data operations within the deduplication logic.
File/Path | Change Summary |
---|---|
.../dedup.rs |
Introduced changes for deduplication strategies, added structs like LastFieldsBuilder , functions for filtering deleted rows, and test cases. |
.../merge.rs |
Added comments to clarify the behavior of the MergeReader with respect to duplicate rows between batches. |
sequenceDiagram
participant Client
participant DedupService
participant MergeReader
participant BatchProcessor
Client ->> DedupService: Request deduplication
DedupService ->> BatchProcessor: Process batch
BatchProcessor ->> DedupService: Filter deleted rows, merge fields
DedupService -->> Client: Provide deduplicated data
MergeReader ->> DedupService: Access next batch
MergeReader -->> DedupService: Ensure no duplicate rows within batch
In the land of code, where bytes do race,
Deduplication takes its place with grace.
Filtering and merging, rows set free,
A tidy batch for you and me.
With metrics sharp and strategies wise,
The data flows, a streamlined prize.
🐇✨
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https://github.com/GreptimeTeam/greptimedb/pull/4184/commits/211a37138f629915a63083c7084b47013eaedc29 fixes an issue that the builder may not reset itself. It also adds more tests.
All modified and coverable lines are covered by tests :white_check_mark:
Project coverage is 84.80%. Comparing base (
b739c9f
) to head (f95fc79
). Report is 15 commits behind head on main.
I hereby agree to the terms of the GreptimeDB CLA.
Refer to a related PR or issue link (optional)
What's changed and what's your intention?
This PR implements a new dedup strategy
LastNotNull
. This strategy merges the rows with the same key together and uses the latest not null value as the final value for each field.Checklist
Summary by CodeRabbit
New Features
Bug Fixes
Documentation