要解决MySql中的问题,即某些语句仅在我试图创建,运行然后在JdbcTemplate提交的sql中删除存储过程的存储过程中允许。一个简化的示例是(这恰好在春季启动中):
@Service
public class StartupDatabaseCheck {
private JdbcTemplate template;
@Autowired
public StartupDatabaseCheck(JdbcTemplate template){
this.template = template;
}
@PostConstruct
public void init() {
log.info("Running custom fields table creation (if required)");
try {
String migrateSql = Resources.toString(Resources.getResource("migrateScript.sql"), Charsets.UTF_8);
template.execute(migrateSql);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
migrateScript.sql在哪里
DELIMITER //
CREATE PROCEDURE migrate()
BEGIN
IF ((SELECT count(1)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'custom_field_instance_data'
and column_name='entity_id' and is_nullable = false) > 0)
THEN
alter table custom_field_instance_data MODIFY COLUMN entity_id char(32) null;
END IF;
END //
DELIMITER ;
call migrate;
drop procedure migrate;
在mySql工作台中运行此程序可以正常工作,但由JdbcTemplate提交时出现错误
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 'CREATE PROCEDURE migrate_custom_fields()
据我所知,这是因为这些DELIMITER
语句are not permitted by JdbcTemplate但只是按照该链接中的建议将其删除会导致其他语法错误
JdbcTemplate如何创建mySQL存储过程(或执行通常只允许存储过程使用的语句)
没有deliminator语句的错误是
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 'CREATE PROCEDURE migrate_custom_fields()
答案 0 :(得分:1)
驱动程序似乎没有将定界查询带入帐户。如果要使用jdbc动态创建存储过程。 使用以下属性,并将其作为URL中的连接参数传递。
jdbc:mysql://localhost:3306/test?allowMultiQueries=true
以上属性将允许“;”分隔查询。 你可以在这里找到更多 Create MySQL stored procedure using JPA Hibernate
在这种情况下,更新后的migrateScript.sql将是
drop procedure IF EXISTS migrate_custom_fields;
CREATE PROCEDURE migrate_custom_fields()
BEGIN
IF ((SELECT count(1)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'custom_field_instance_data'
and column_name='entity_id' and is_nullable = false) > 0)
THEN
alter table custom_field_instance_data MODIFY COLUMN entity_id char(32) null;
END IF;
END ;
call migrate_custom_fields;
drop procedure migrate_custom_fields;