Question

我尝试解决Flyway issue 156（see here）的方法之一就是依赖Java迁移。为此，我已经基于the sample编写了一个，以便建立数据库的初始状态。

首先，我获取数据库的初始状态（mysql 5.5）并将其放入一个文本文件中以便进行迁移：

mysqldump -u root -p myProject > db/migration/_V1__baseline.sql

然后，我编写了一个Java Migration，在第一次创建时将该状态加载到新数据库中：

package com.myCompany.myProject.migration;
import com.googlecode.flyway.core.migration.java.JavaMigration;
import org.springframework.jdbc.core.JdbcTemplate;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import org.springframework.dao.DataAccessException;

public class V1__baseline implements JavaMigration {
    @Override
    public void migrate(JdbcTemplate jdbcTemplate) throws Exception {
        BufferedReader stream = null;
        String sqlCode = "";
        String line;
        try {
            stream = new BufferedReader(new FileReader("db/migration/_V1__baseline.sql"));
            while ((line = stream.readLine()) != null) {
                sqlCode += line + '\n';
            }
            jdbcTemplate.execute(sqlCode);
        }catch(IOException e){
            System.out.println("File error: "+ e.getMessage());
        }catch(DataAccessException e){
            System.out.println("Data access exception: "+ e.getMessage());
        }catch(Exception e){
            System.out.println("Generic Exception: "+ e.getMessage());
        } finally {
            if (stream != null) {
                stream.close();
            }
        }
    }
}

然后，尝试一下：

mvn compile flyway:clean flyway:init flyway:migrate

结果：

[INFO] --- flyway-maven-plugin:1.5:migrate (default-cli) @ elysium-unity-server ---
[WARNING] Unable to find path for sql migrations: db/migration
[WARNING] Unable to find path for sql migrations: db/migration
[WARNING] Unable to find path for sql migrations: db/migration
[INFO] Validated 0 migrations (mode: ALL) (execution time 00:00.002s)
[INFO] Current schema version: 0
[INFO] Migrating to version 1
Data access exception: StatementCallback; bad SQL grammar [-- MySQL dump 10.13  Distrib 5.5.19, for Win64 (x86)
--
-- Host: localhost    Database: myProject
-- ------------------------------------------------------
-- Server version       5.5.19

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
... lots more lines ...
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

-- Dump completed on 2012-02-03 12:51:33
]; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COL' at line 8

所以它看起来像mysql语法错误。但是语法是由我试图将其提供给的同一个数据库生成的。所以我猜测中间肯定会有一些东西妨碍我。有什么建议？我想了解为什么这种确切的方法不起作用，但我也非常感谢接受其他方法的建议my ultimate goal。

Answer 1

看看你的另一个问题的答案。

Flyway SQL解析器应该能够毫无问题地处理这种类型的输入。

如何仅仅为了执行sql脚本而获得Flyway Java Migration？

1 个答案: