pingcap/tidb

Add LOAD_FILE() function

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#8,436 创建于 2018年11月24日

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help wantedpriority/P4type/compatibility

描述

Feature Request

Is your feature request related to a problem? Please describe:

Not a high priority, but apart from SOUNDEX() the LOAD_FILE function is the only string function not supported by TiDB.

In MySQL it is rarely used because of security implications.

Describe the feature you'd like:

LOAD_FILE as in MySQL 5.7: https://dev.mysql.com/doc/refman/5.7/en/string-functions.html#function_load-file

Describe alternatives you've considered:

The alternative is to document as won't support.

Teachability, Documentation, Adoption, Migration Strategy:

贡献者指南

技术栈
gosql
领域
databasebackend
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-2 days
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
blocked
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Knowledge of TiDB expression evaluationFamiliarity with MySQL string functions
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
25
研究方向
Review existing string function implementations in TiDB's expression package (e.g., SOUNDEX). Implement LOAD FILE following MySQL 5.7 documentation, handling file reading and security restrictions. Add tests for various file scenarios.