stephencelis/SQLite.swift

Add column weights to FTS order by Rank

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#1,016 建立於 2020年7月30日

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 (6 留言) (1 反應) (0 負責人)Swift (10,145 star) (1,618 fork)batch import
enhancementhelp wanted

描述

As far as I can tell, you can't currently run a Full-text search and order by rank in SQLite.swift.

SELECT * FROM fts WHERE fts MATCH ? ORDER BY bm25(fts);
SELECT * FROM fts WHERE fts MATCH ? ORDER BY rank;

Is this feature currently available? If not, how do we order the results of a Full-text search by relevance? Is there currently a workaround?

貢獻者指南

技術棧
swiftsql
領域
database
議題類型
feature
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
SwiftSQLite FTS
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
35
研究方向
Review the existing FTS support in SQLite.swift, particularly in the FTS extension files. Check if ordering by rank is already possible via the query builder. If not, explore adding a method like `orderByRank()` that takes optional column weights. Look at SQLite documentation for the `bm25` and `rank` functions. The issue comments may contain further discussion or workarounds.