环境：

数据库：Sqlserver2014
网站程序：.Net5
Docker版本：Docker version 19.03.13,
.net5环境镜像源：mcr.microsoft.com/dotnet/aspnet:5.0-buster-slim
Centos版本：CentOS Linux release 7.9.2009 (Core)

使用原生方式进行测试

using (SqlConnection connection = new SqlConnection("Data Source=xxxxx;User Id=sa;Password=xxxxxx;Initial Catalog=xxxxxxxx;Pooling=true;Min Pool Size=1;"))
{
connection

seems there is a bug in DB2LUWSchemaProvider class, when loading columns of table, it didn't trim the tailing space of the schema name, causes linq query didn't return any column.

the problem is in the GetColumns method here:

var tableId     = dataConnection.Connection.Database + "." + rd.GetString(0) + "." + rd.GetString(1);

and it should be:

var tableId     = dataConnect