Converting Graph (old) to Time series does not handle series overrides using regex

[Darth-Bobo]

What happened: Changing a graph of type "Graph (old)" to the new "Time series" converts a "series override" using a regex into a field "field with name" override instead of a "field with name matching regex" override.

What you expected to happen: The series override should convert to a field with name matching regex override where appropriate.

How to reproduce it (as minimally and precisely as possible):
Take any panel of type "Graph (old)", add a series override using a regex in the "Alias or regex" box.
Change the visualisation to "Time series". The override is converted to the wrong type with an error saying "(not found)".

Anything else we need to know?:

Environment:

• Grafana version: 8.0.1
• Data source type & version: AWS Timestream
• OS Grafana is installed on: Amazon Linux 2
• User OS & Browser: macOS Big Sur, Firefox 89.0.1
• Grafana plugins:
• Others:

[zuchka]

Hi @Darth-Bobo,

Thanks for reporting this. I reproduced your error on our public sandbox. Let me know if I missed anything 👍

Confirming the "not found" text in the new override settings, inside the Time Series panel, as well:

[torkelo]

We need to detect if alias here contains a regex and use a regex matcher instead: https://github.com/grafana/grafana/blob/main/public/app/plugins/panel/timeseries/migrations.ts#L115