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Transformations: Use fieldMatchers for convertFieldType and add doc (#38769)

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nikki-kiga
2021-09-02 19:18:06 -07:00
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docs/sources/panels/transformations/types-options.md
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@@ -10,6 +10,7 @@ Grafana comes with the following transformations:
- [Add field from calculation]({{< relref "./types-options.md#add-field-from-calculation" >}})
- [Concatenate fields]({{< relref "./types-options.md#concatenate-fields" >}})
- [Config from query results]({{< relref "./config-from-query.md" >}})
- [Convert field type]({{< relref "./types-options.md#convert-field-type" >}})
- [Filter data by name]({{< relref "./types-options.md#filter-data-by-name" >}})
- [Filter data by query]({{< relref "./types-options.md#filter-data-by-query" >}})
- [Filter data by value]({{< relref "./types-options.md#filter-data-by-value" >}})
@@ -324,6 +325,36 @@ After you concatenate the fields, the data frame would be:
| ---- | ------- | --- | ------ |
| 15.4 | 1230233 | 3.2 | 5 |
## Convert field type
This transformation changes the field type of the specified field.
- **Field -** Select from available fields
- **as -** Select the FieldType to convert to
- **Numeric -** attempts to make the values numbers
- **String -** will make the values strings
- **Time -** attempts to parse the values as time
- Will show an option to specify a DateFormat as input by a string like yyyy-mm-dd or DD MM YYYY hh:mm:ss
- **Boolean -** will make the values booleans
For example the following query could be modified by selecting the time field, as Time, and Date Format as YYYY.
| Time | Mark | Value |
| ---------- | ----- | ----- |
| 2017-07-01 | above | 25 |
| 2018-08-02 | below | 22 |
| 2019-09-02 | below | 29 |
| 2020-10-04 | above | 22 |
The result:
| Time | Mark | Value |
| ------------------- | ----- | ----- |
| 2017-01-01 00:00:00 | above | 25 |
| 2018-01-01 00:00:00 | below | 22 |
| 2019-01-01 00:00:00 | below | 29 |
| 2020-01-01 00:00:00 | above | 22 |
## Series to rows
> **Note:** This transformation is available in Grafana 7.1+.