MyCATApache/Mycat-Server

更新版本后无法正常 prepare

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#2892 opened on Jan 6, 2022

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 (3 comments) (0 reactions) (0 assignees)Java (9,451 stars) (3,886 forks)batch import
help wanted

Description

错误讯息

1、bug描述 更新版本后 prepare 报错 更新前 image 更新后 image

2、版本号(非常重要) 原版本 Mycat-server-1.6.7.6-release-20210303094759 新版本 Mycat-server-1.6.7.6-release-20211221142218

3、相关表的配置信息 schema.xml (需包含表的配置信息，mysql的连接驱动是JDBC还是native方式) jdbc方式 rule.xml (涉及到的路由函数) 默认 server.xml(可选)

4、操作步骤

5、期望结果 A clear and concise description of what you expected to happen.

6、实际结果 A clear and concise description of what actually happened.

7、额外信息 Add any other context about the problem here.

Contributor guide

Tech stack
java
Domain
backenddatabase
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Java basicsMycat configurationJDBC concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
Investigate the regression between versions 20210303094759 and 20211221142218. The prepare functionality likely involves classes like `ServerPrepare` or `PreparedStatement`. Compare the code changes in the release tags to identify what broke the prepare command. The error logs in the screenshots should be examined to pinpoint the failure. Comments in the issue may provide additional context.