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mysql: pass timerange for template variable queries #10071

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merged 4 commits into from Dec 7, 2017
Merged

mysql: pass timerange for template variable queries #10071

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4c0a14a
mysql: pass timerange for template variable queries
svenklemm Dec 4, 2017
794c4b5
mysql: document time range macro usage in template variables
svenklemm Dec 7, 2017
5325972
mysql: docs for on time range change refresh mode for template queries
daniellee Dec 7, 2017
3160398
Revert "mysql: docs for on time range change refresh mode for templat…
daniellee Dec 7, 2017
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6 changes: 6 additions & 0 deletions docs/sources/features/datasources/mysql.md
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Expand Up @@ -127,6 +127,12 @@ A query can returns multiple columns and Grafana will automatically create a lis
SELECT my_host.hostname, my_other_host.hostname2 FROM my_host JOIN my_other_host ON my_host.city = my_other_host.city
```

To use time range dependent macros like `$__timeFilter(column)` in your query the refresh mode of the template variable needs to be set to *On Time Range Change*.

```sql
SELECT event_name FROM event_log WHERE $__timeFilter(time_column)
```

Another option is a query that can create a key/value variable. The query should return two columns that are named `__text` and `__value`. The `__text` column value should be unique (if it is not unique then the first value is used). The options in the dropdown will have a text and value that allows you to have a friendly name as text and an id as the value. An example query with `hostname` as the text and `id` as the value:

```sql
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15 changes: 12 additions & 3 deletions public/app/plugins/datasource/mysql/datasource.ts
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Expand Up @@ -103,12 +103,21 @@ export class MysqlDatasource {
format: 'table',
};

var data = {
queries: [interpolatedQuery],
};

if (optionalOptions && optionalOptions.range && optionalOptions.range.from) {
data['from'] = optionalOptions.range.from.valueOf().toString();
}
if (optionalOptions && optionalOptions.range && optionalOptions.range.to) {
data['to'] = optionalOptions.range.to.valueOf().toString();
}

return this.backendSrv.datasourceRequest({
url: '/api/tsdb/query',
method: 'POST',
data: {
queries: [interpolatedQuery],
}
data: data
})
.then(data => this.responseParser.parseMetricFindQueryResult(refId, data));
}
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