4paradigm / 4paradigm/OpenMLDB
Support rows_range Window to slide with determined order
- 主要言語
- C++
- スター
- 1.7k
- フォーク
- 331
- 平均マージ
- 12日 12時間
- マージ済み PR(30日)
- 1
説明
**Is your feature request related to a problem? Please describe.**
OpenMLDB supports `ROWS_RANGE` syntax to define a window sliding by rows. However, when the dataset contains multiple rows sharing the same order value, the corresponding window rows will be variant since the random order of these rows.
In this issue, we are going to perform a window slide in a determined order so that the window and window aggregation results will be identical no matter how many times we perform window computation.
**Describe the solution you'd like**
- Assigned a determined row_id to the data rows
- Window slide based on the order column and the row_id automatically.
- ordered id should be associated with the online data coming order.
**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.
**Additional context**
Add any other context or screenshots about the feature request here.
コントリビューションガイド
調査の方向性
The issue is about the ROWS_RANGE window function in OpenMLDB. Look at the SQL parser and window execution logic, likely in src/parser or src/engine. Understand how rows are ordered and assigned row_ids. The goal is to make window results deterministic when rows share the same order value. Check existing tests for window functions to see the expected behavior.
索引モデルが issue の本文から書いたものです。
評価
- 技術スタック
- sql
- 領域
- databases, machine-learning
- issue の種類
- 機能追加
- 難易度
- 4/5
- 見積もり時間
- 3〜5日
- 活発さ
- 停滞
- 明瞭さ
- おおむね明確
- 初心者へのやさしさ
- 35/100