Azure MS SQL Server - USE statement is not supported to switch between databases

Hi,
I'm trying to use fluent-plugin-sql with Azure MS SQL Server DB and getting error.

Dockerfile partial config:

```
&& gem install fluent-plugin-sql --no-document \
&& gem install tiny_tds \
&& gem install activerecord-sqlserver-adapter \
```

fluent.conf

```

@type sql
host ...
port 1433
database ...
adapter sqlserver
username ...
password ...

table ...

```

Error in fluentd logs:

```
2023-05-12 19:59:57 +0000 [warn]: #0 failed to flush the buffer. retry_times=0 next_retry_time=2023-05-12 19:59:58 +0000 chunk="5fb8489140af6d7034566d69be465982" error_class=TinyTds::Error error="USE statement is not supported to switch between databases. Use a new connection to connect to a different database."
2023-05-12 19:59:57 +0000 [warn]: #0 /usr/local/rvm/rubies/ruby-3.1.4/lib/ruby/gems/3.1.0/gems/tiny_tds-2.1.5/lib/tiny_tds/client.rb:60:in `connect'
2023-05-12 19:59:57 +0000 [warn]: #0 /usr/local/rvm/rubies/ruby-3.1.4/lib/ruby/gems/3.1.0/gems/tiny_tds-2.1.5/lib/tiny_tds/client.rb:60:in `initialize'
2023-05-12 19:59:57 +0000 [warn]: #0 /usr/local/rvm/rubies/ruby-3.1.4/lib/ruby/gems/3.1.0/gems/activerecord-sqlserver-adapter-7.0.2.0/lib/active_record/connection_adapters/sqlserver_adapter.rb:90:in `new'
2023-05-12 19:59:57 +0000 [warn]: #0 /usr/local/rvm/rubies/ruby-3.1.4/lib/ruby/gems/3.1.0/gems/activerecord-sqlserver-adapter-7.0.2.0/lib/active_record/connection_adapters/sqlserver_adapter.rb:90:in `dblib_connect'
2023-05-12 19:59:57 +0000 [warn]: #0 /usr/local/rvm/rubies/ruby-3.1.4/lib/ruby/gems/3.1.0/gems/activerecord-sqlserver-adapter-7.0.2.0/lib/active_record/connection_adapters/sqlserver_adapter.rb:83:in `new_client'
2023-05-12 19:59:57 +0000 [warn]: #0 /usr/local/rvm/rubies/ruby-3.1.4/lib/ruby/gems/3.1.0/gems/activerecord-sqlserver-adapter-7.0.2.0/lib/active_record/sqlserver_base.rb:15:in `sqlserver_connection'
```

Looks like Azure SQL Server doesn't support USE command to switch database. Anyone faced and resolved this?
Thanks in advance.

使用 Dockerfile 的依赖设置和 fluent.conf 作为复现上下文，然后跟踪报告中的 ActiveRecord SQL Server 和 TinyTDS 连接堆栈。确定 sql plugin 如何将数据库设置传递给该连接，并针对 Azure MS SQL Server 确认其行为。当配置的数据库连接能够在不使用不受支持的 USE 开关的情况下成功建立时，即表示完成。

由索引模型根据 Issue 内容生成。