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Correlations: Add documentation around variable exceptions (#71511) (#76510)

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Piotr Jamróz 2023-10-13 15:32:38 +02:00 committed by GitHub
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docs/sources/administration/correlations/correlation-configuration/index.md
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@ -55,6 +55,8 @@ In addition to mapping field values to shorter variable names, more correlation
For more details, please see the example in [Use variables and transformations in a correlation]({{< relref "./use-variables-and-transformations" >}}).
Correlation creates a data link only if all variables have values in the selected data row. [Global variables]({{< relref "/docs/grafana/latest/dashboards/variables/add-template-variables#global-variables" >}}) are exception to this rule and are not required to be filled in from the returned data. These variables are interpolated automatically by data sources.
### Correlation Transformations
Correlations provide a way to extract more variables out of field values. The output of transformations is a set of new variables that can be accessed as any other variable.