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Loki: Update Query Variable docs (#54909)

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* feat(loki-query-variable-editor): update docs

* Chore: fix typo in updated docs

* Chore: improve redaction

Co-authored-by: Kim Nylander <104772500+knylander-grafana@users.noreply.github.com>

Co-authored-by: Kim Nylander <104772500+knylander-grafana@users.noreply.github.com>
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Matias Chomicki
2022-09-13 10:04:33 +02:00
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docs/sources/datasources/loki.md
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@@ -213,13 +213,14 @@ Check out the [Templating]({{< relref "../dashboards/variables" >}}) documentati
## Query variable
Variable of the type _Query_ allows you to query Loki for a list labels or label values. The Loki data source plugin
provides the following functions you can use in the `Query` input field.
provides a form to select the type of values that can be expected for a given variable.
The form has these options:
| Name | Description |
| ------------------------------------------ | -------------------------------------------------------------------------------------- |
| `label_names()` | Returns a list of label names. |
| `label_values(label)` | Returns a list of label values for the `label`. |
| `label_values(log stream selector, label)` | Returns a list of label values for the `label` in the specified `log stream selector`. |
| Query Type | Label | Stream Selector | Description |
| ------------ | ------------ | --------------------- | -------------------------------------------------------------------------------------- |
| Label names | Not required | Not required | Returns a list of label names. |
| Label values | `label` | | Returns a list of label values for the `label`. |
| Label values | `label` | `log stream selector` | Returns a list of label values for the `label` in the specified `log stream selector`. |
### Ad hoc filters variable