feat: query to get all schema of the space · vesoft-inc/nebula

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help wantedtype/feature req

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描述

This is needed in some cases i.e. support nebulagraph query in Langchain.

From the application layer, sometimes we could leverage meta-client to do so but it's not applicable for all cases.

Possible options:

introduce a query to show all schemas in one go
support variable/pipeline on desc query like:

(root@nebula) [basketballplayer]> show edges AS e| desc edge $-.e
[ERROR (-1004)]: SyntaxError: syntax error near `AS'

Wed, 31 May 2023 15:27:30 CST

貢獻者指南

研究方向: 研究如何透過查詢語言公開結構描述資訊。查看解析器和執行器中現有的 'SHOW' 和 'DESC' 查詢實作。考慮新增類似 'SHOW SCHEMA' 的查詢或增強管道支援。檢查 src/parser/、src/executor/ 和元服務層中的相關檔案。同時查閱社群討論或相關議題以確定首選方案。
技術棧: cpp
領域: database
議題類型: 功能
難度: 3
預計時間: 半天
活動狀態: 較久未更新
清晰度: 大致清晰
前置要求: Graph database conceptsQuery language design
新手友善度: 40