Comments (15)
hi,这个是不支持的
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还有解决方案吗。。我有看到你的提供的Interceptor接口,,参否能这接口里面加个方法上下文
from mango.
请考虑下面的问题:
order表在db1
sub_order表在db2
他们是不可以进行join查询的
from mango.
嗯。。你说的这个肯定是不可以,但也有这样的规则,就是每个用户一生成的时候,同时也生成对应的分库分表下标,例如分表下标分别是1,则order和sub_order是在同一库上,分表都是1
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设计上已经把order 和 sub_order指定在同一库上,至于在哪个库,是由生成用户的时候一并生成出来的,此时就已经知道该用户是哪个库哪个表下标
from mango.
还有个问题就是,能否参考一下spring的扩展性,XxxFactory一般都是可以让开发人员设置进来的,没有设置才会使用默认XxxFactory
from mango.
最好的办法就是分两次读出表数据,然后在应用服务器中进行内存中计算,高并发的服务理应是杜绝join语句的。
from mango.
请问一下XxxFactory是什么?
from mango.
高并发的服务理应是杜绝join语句的???求大师分析,这个还不太明白
from mango.
哦,参考shiro框架,扩展性很好
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join会过多的占用数据库的cpu和内存资源
from mango.
不Join的话。就会多执行几次sql,这样不会更容易造成数据的问题吗
from mango.
还是有区别的,具体可以询问一下你们公司的DBA
from mango.
好的,你能开源一下词法jj文件吗
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请看这里 https://github.com/jfaster/mango/blob/master/src/main/jjtree/parser.jjt
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Related Issues (20)
- can mango support spring boot? HOT 1
- batch insert问题 HOT 3
- order by 传递动态参数问题 HOT 2
- 2 HOT 1
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- 调用错误 HOT 1
- CrudDao存在隐藏bug HOT 1
- 主库从库配置中多个库的情况如何配置 HOT 3
- 请问一下,如何根据参数进行排序 HOT 2
- DAO在springboot中Autowired问题 HOT 3
- mysql分页拦截器 多线程查询会不出现数据不一致的情况 HOT 1
- why not support custom JdbcTemplate ?
- springboot 中@Transactional 注解不生效 HOT 2
- SQL中有中文导致报TokenMgrError: Lexical error HOT 5
- TransactionTemplate支持不同的datasource的DAO吗 HOT 3
- mysql d递归查询语法解析存在问题 HOT 1
- 关于主从读写分离的疑问 HOT 2
- 读操作从主库读取,usemaster注解没有起作用
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