add back frame.fields for no-rows table-queries

grafana / sqlds

A package that assists writing SQL-driven datasources

Apache License 2.0

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Closed gabor closed 3 months ago

gabor commented 3 months ago

if you have a format=table query that returns no rows:
- previously we made a dataframe with all the fields, except their length was zero
- after the PR we return a frame with no fields

we should restore the previous functionality.