We are currently using Grafana v9.x and Grafana v12.x.
In some of our panels, we use the Transformation → Reduce row option to calculate values. In Grafana v9.x, the panel displays the correct values as expected.
However, when we open the same panel in Grafana v12.x, the Reduce row transformation returns incorrect values, even though the query and panel configuration remain the same.
Summary:
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Grafana versions: v9.x and v12.x
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Transformation used: Reduce row
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Same query and panel configuration
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v9.x → Correct value
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v12.x → Incorrect value
We would like to know:
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If there have been any changes to the Reduce row transformation behavior in Grafana v12
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Whether any additional configuration or migration steps are required
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Or if this might be a known issue
For reference, we have attached screenshots from both versions:
**v9.x: **
v12.x:
