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Alexander Akhmetov c54da8f955 Alerting: Make $value return the query value in case when a single datasource is used (#102301) ... What is this feature? This PR changes the behavior of the $value and .Value variables in alerting templating to be more compatible with Prometheus templating. When a single datasource is used in the alerting rule, these variables will now return the numeric value from the query instead of the evaluation string. Why do we need this feature? It makes Grafana templating more compatible with Prometheus templates. In Prometheus, $value returns the numeric value of the query, but in Grafana it's the evaluation string: [ var='A' labels={instance=instance1} value=81.234 ]. This is because in Grafana multiple datasources can be used in the alert rule, and it's not always possible to get a single value. This change makes Grafana's behavior consistent with Prometheus when a single datasource is used, and in case when multiple datasources are used in the query, it keeps the old behaviour. Both $value and .Value are not recommended to use (documentation), and it's better to use .Values instead.		3 months ago
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create-recording-rules	Alerting docs: `reorder rules` action in DS rules (#97974)	6 months ago
templates	Alerting: Make $value return the query value in case when a single datasource is used (#102301)	3 months ago
_index.md	Alerting docs: fix template example link (#98715)	6 months ago
create-data-source-managed-rule.md	Alerting docs: clarify data source-managed rules for Prometheus (#98378)	5 months ago
create-grafana-managed-rule.md	Lint only Markdown files (#101533)	4 months ago
link-alert-rules-to-panels.md	docs(alerting): add notification screenshots details in `Create and link alert rules to panels` (#102103)	4 months ago