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+title = "为什么无法切换到目标数据库" 
+
+date = "2022-07-14" 
+
+tags = ["为什么无法切换到目标数据库"] 
+
+archives = "2022-07" 
+
+author = "张翠娉" 
+
+summary = "为什么无法切换到目标数据库"
+
+img = "/zh/post/zhangcuiping/title/img.png" 
+
+times = "14:20"
+
++++
+
+# 为什么无法切换到目标数据库？
+
+**背景介绍**：
+
+在执行数据库相关操作时，发现无法切换到目标数据库。
+
+**报错内容**：
+
+```bash
+[ommdoc@hostname]$ gsql -d postgres -p 28000
+gsql ((MogDB 3.0.0 build 62408a0f) compiled at 2022-06-30 15:06:56 commit 0 last mr  )
+Non-SSL connection (SSL connection is recommended when requiring high-security)
+Type "help" for help.
+
+MogDB=# \c mogdb
+Non-SSL connection (SSL connection is recommended when requiring high-security)
+You are now connected to database "mogdb" as user "ommdoc".
+mogdb=# \c MogDB
+Non-SSL connection (SSL connection is recommended when requiring high-security)
+You are now connected to database "mogdb" as user "ommdoc".
+mogdb=#
+```
+
+**报错原因**：
+
+初始化库名时，只是把原来初始化的postgres库名，在客户端gsql上替换成了MogDB而已。实际上在数据库系统表和内部，其实是postgres库。
+
+**解决办法**：
+
+执行以下命令进行切换：
+
+```bash
+mogdb=# \c postgres
+Non-SSL connection (SSL connection is recommended when requiring high-security)
+You are now connected to database "postgres" as user "ommdoc".
+MogDB=# 
+```
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