private ParameterContext GetParameterContext(ParameterContext parameterContext, List <string> parameterNames)
{
if (0 == _parametersCount)
{
return(new ParameterContext(0));
}
var result = new ParameterContext(_parametersCount);
foreach (var parameterName in parameterNames)
{
if (!parameterContext.TryGetDbParameter(parameterName, out var dbParameter))
{
throw new ShardingException($"parameter name:[{parameterName}] not found in parameters");
}
result.AddParameter(dbParameter);
}
return(result);
}