update SQL connector to support Grafana 9

src/connectors/sql.ts

@@ -6,11 +6,13 @@ import * as _ from 'lodash';
 // as of 26.09.2020, it works for all SQL datasources
 export class SqlConnector extends DatasourceConnector {
   private _targetName: string; //save first target name, while multi metric not implemented
-  private url: string = 'api/tsdb/query';
+  private url: string;
 
   constructor(datasource: Datasource, targets: any[]) {
     super(datasource, targets);
 
+    this.url = datasource.url;
+
     if(targets.length === 0) {
       throw Error('got empty targets list');
     }
@@ -34,7 +36,7 @@ export class SqlConnector extends DatasourceConnector {
         data: {
           from: String(from),
           to: String(to),
-          queries: queries
+          queries: queries,
         }
       }
     };
@@ -53,16 +55,15 @@ export class SqlConnector extends DatasourceConnector {
 
     // TODO: support more than 1 metric (each res.data.results item is a metric)
     let results = res.data.results[this._targetName];
-    if (!results.series) {
+    if (_.isEmpty(results.frames)) {
       return emptyResult;
     }
 
-    let points = results.series[0].points;
+    const frame = results.frames[0];
-    points.forEach(p => p.reverse());
-
     return {
-      columns: ['timestamp', results.series[0].name],
+      columns: frame.schema.fields.map(field => field.name),
-      values: points
+      // @ts-ignore
+      values:  _.zip(...frame.data.values),
     };
   }
 }

src/connectors/utils.ts

@@ -32,7 +32,7 @@ export function processSQLLimitOffset(sql: string, limit: number, offset: number
 }
 
 function ensureParentheses(regex: RegExp, str: string): { index: number, length: number } {
-  let occurence: RegExpExecArray;
+  let occurence: RegExpExecArray | null;
   while((occurence = regex.exec(str)) !== null) {
     let leftPart = str.slice(0, occurence.index)
     let rightPart = str.slice(occurence.index + occurence[0].length);

src/services/query_service/grafana.ts

@@ -16,9 +16,6 @@ export class GrafanaQueryService extends QueryService {
   async query(query: DatasourceQuery, apiKey: string): Promise<AxiosResponse<any>> {
     let headers = { Authorization: `Bearer ${apiKey}` };
 
-    const grafanaUrl = getGrafanaUrl(query.url);
-    query.url = `${grafanaUrl}/${query.url}`;
-
     if(query.headers !== undefined) {
       _.merge(headers, query.headers);
     }
@@ -64,20 +61,3 @@ export class GrafanaQueryService extends QueryService {
     }
   }
 }
-
-export function getGrafanaUrl(url: string): string {
-  const parsedUrl = new URL(url);
-  const path = parsedUrl.pathname;
-  const panelUrl = path.match(/^\/*([^\/]*)\/d\//);
-  if(panelUrl === null) {
-    return url;
-  }
-
-  const origin = parsedUrl.origin;
-  const grafanaSubPath = panelUrl[1];
-  if(grafanaSubPath.length > 0) {
-    return `${origin}/${grafanaSubPath}`;
-  }
-
-  return origin;
-}