Breaking change in 1.4: TableNameMapping doesn't allow table name to start with lowercase character

[dpk83]

Issue with OpenTelemetry.Exporter.Geneva

OpenTelemetry.Exporter.Geneva 1.4.0

Is this a feature request or a bug?

• Feature Request
• [x ] Bug

What is the expected behavior?
Geneva supports table names that starts with lowercase characters, so a table name that starts with lowercase character should work.

What do you expect to see?
When I pass a table name that starts with lowercase characters in TableNameMapping i.e. myTable, then it should work.

What is the actual behavior?
Exporter throws when table name provided in TableNameMapping starts with lowercase character.

This is a breaking change because the logs can not be sent to existing tables which were being used prior to 1.4 release. Moving logs to new table breaks the user experience

options.TableNameMapping = new Dictionary<string, string>
{
     ["Example.DefaultService"] = "myTableName"
};

This doesn't work and throws. Was working with 1.3 release.

Additional Context

Add any other context about the feature request here.

[cijothomas]

@utpilla Please take a look. Thanks.

[CodeBlanch]

@dpk83 FYI GenevaExporter v1.4.1 available on NuGet now with a fix for this.

[dpk83]

Great. Thanks!