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feat: add TimeSeriesRowSelector hint #4327

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merged 3 commits into from
Jul 9, 2024

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evenyag
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@evenyag evenyag commented Jul 9, 2024

I hereby agree to the terms of the GreptimeDB CLA.

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What's changed and what's your intention?

This PR adds a hint to push down LastRow request to the storage engine.

Checklist

  • I have written the necessary rustdoc comments.
  • I have added the necessary unit tests and integration tests.
  • This PR requires documentation updates.

Summary by CodeRabbit

  • New Features

    • Introduced series_row_selector field to enhance data scanning and projection capabilities.
    • Added TimeSeriesRowSelector enum with a LastRow variant for more refined data selection.
  • Bug Fixes

    • Improved initialization of structures with series_row_selector: None to prevent potential errors in data handling.

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coderabbitai bot commented Jul 9, 2024

Walkthrough

The recent code changes introduce a series_row_selector field, consistently set to None, across various places in the metadata_region.rs, projection_test.rs, and scan_region.rs files. Additionally, new methods and an enum TimeSeriesRowSelector are added to support selecting time series rows in the scan process, enhancing the flexibility and functionality of data scanning.

Changes

Files Summary
src/metric-engine/src/metadata_region.rs Added series_row_selector: None in the MetadataRegion and test module struct initializations.
src/mito2/src/engine/projection_test.rs Added series_row_selector: None to a struct in the test_scan_projection function.
src/mito2/src/read/scan_region.rs Added series_row_selector to ScanInput, updated methods to set/get it, modified ScanRegion implementation.
src/store-api/src/storage.rs Exported TimeSeriesRowSelector from the requests module.
src/store-api/src/storage/requests.rs Introduced TimeSeriesRowSelector enum with variant LastRow, added series_row_selector to ScanRequest.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant MetadataRegion
    participant ScanRegion
    participant StoreAPI

    Client->>MetadataRegion: Initialize with series_row_selector: None
    MetadataRegion->>ScanRegion: Create ScanInput with series_row_selector
    ScanRegion->>StoreAPI: Perform scanning with TimeSeriesRowSelector
    StoreAPI-->>ScanRegion: Return selected time series rows
    ScanRegion-->>MetadataRegion: Return scan results
    MetadataRegion-->>Client: Provide final results
Loading

Poem

On a field of code, where data lays,
A selector now, to guide our ways.
Through regions vast, it scans with care,
Finding rows, with more to share.
From tests to stores, its work is neat,
Code and data, now complete. 🐰✨


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@github-actions github-actions bot added the docs-not-required This change does not impact docs. label Jul 9, 2024
@evenyag evenyag marked this pull request as ready for review July 9, 2024 12:14
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Actionable comments posted: 0

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 1ddf19d and 7ca19be.

Files selected for processing (5)
  • src/metric-engine/src/metadata_region.rs (3 hunks)
  • src/mito2/src/engine/projection_test.rs (1 hunks)
  • src/mito2/src/read/scan_region.rs (5 hunks)
  • src/store-api/src/storage.rs (1 hunks)
  • src/store-api/src/storage/requests.rs (2 hunks)
Files skipped from review due to trivial changes (1)
  • src/store-api/src/storage.rs
Additional comments not posted (7)
src/store-api/src/storage/requests.rs (2)

18-23: LGTM!

The TimeSeriesRowSelector enum is well-defined and includes necessary traits for cloning, debugging, and equality checks.


39-40: LGTM!

The addition of the series_row_selector field to the ScanRequest struct is consistent and follows best practices.

src/mito2/src/engine/projection_test.rs (1)

81-81: LGTM!

The addition of the series_row_selector field to the ScanRequest struct initialization in the test_scan_projection function is straightforward and correct.

src/metric-engine/src/metadata_region.rs (2)

351-351: LGTM!

The addition of the series_row_selector field to the ScanRequest struct initialization in the get_all method is straightforward and correct.


409-409: LGTM!

The addition of the series_row_selector field to the ScanRequest struct initialization in the build_read_request method is straightforward and correct.

src/mito2/src/read/scan_region.rs (2)

414-415: LGTM!

The addition of the series_row_selector field to the ScanInput struct is consistent and follows best practices.


524-532: LGTM!

The with_series_row_selector method is well-defined and follows the builder pattern used for other methods in the ScanInput struct.

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LGTM

@v0y4g3r v0y4g3r enabled auto-merge July 9, 2024 12:26
@v0y4g3r v0y4g3r added this pull request to the merge queue Jul 9, 2024
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codecov bot commented Jul 9, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.89%. Comparing base (7fe3f49) to head (7ca19be).
Report is 2 commits behind head on main.

Additional details and impacted files
@@            Coverage Diff             @@
##             main    #4327      +/-   ##
==========================================
- Coverage   85.17%   84.89%   -0.29%     
==========================================
  Files        1061     1060       -1     
  Lines      188392   188656     +264     
==========================================
- Hits       160469   160162     -307     
- Misses      27923    28494     +571     

Merged via the queue into GreptimeTeam:main with commit 458e5d7 Jul 9, 2024
55 checks passed
@v0y4g3r v0y4g3r deleted the feat/last-row-hint branch July 9, 2024 12:44
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3 participants