Chore: fixes throwing errors on 200 response with influxdb datasource (#24848)

* Chore: fixes throwing errors on 200 response with influxdb datasource

* Chore: changes influxdb error prefix from error to influxdb error

public/app/plugins/datasource/influxdb/datasource.ts

@@ -322,6 +322,15 @@ export default class InfluxDatasource extends DataSourceApi<InfluxQuery, InfluxO
       .datasourceRequest(req)
       .then(
         (result: any) => {
+          if (result.data && result.data.results) {
+            const errors = result.data.results.filter((elem: any) => elem.error);
+            if (errors.length > 0) {
+              throw {
+                message: 'InfluxDB Error: ' + errors[0].error,
+                data: result.data,
+              };
+            }
+          }
           return result.data;
         },
         (err: any) => {

public/app/plugins/datasource/influxdb/specs/datasource.test.ts

@@ -75,6 +75,46 @@ describe('InfluxDataSource', () => {
     });
   });
 
+  describe('When getting error on 200 after issuing a query', () => {
+    const queryOptions: any = {
+      range: {
+        from: '2018-01-01T00:00:00Z',
+        to: '2018-01-02T00:00:00Z',
+      },
+      rangeRaw: {
+        from: '2018-01-01T00:00:00Z',
+        to: '2018-01-02T00:00:00Z',
+      },
+      targets: [{}],
+      timezone: 'UTC',
+      scopedVars: {
+        interval: { text: '1m', value: '1m' },
+        __interval: { text: '1m', value: '1m' },
+        __interval_ms: { text: 60000, value: 60000 },
+      },
+    };
+
+    it('throws an error', async () => {
+      datasourceRequestMock.mockImplementation((req: any) => {
+        return Promise.resolve({
+          data: {
+            results: [
+              {
+                error: 'Query timeout',
+              },
+            ],
+          },
+        });
+      });
+
+      try {
+        await ctx.ds.query(queryOptions);
+      } catch (err) {
+        expect(err.message).toBe('InfluxDB Error: Query timeout');
+      }
+    });
+  });
+
   describe('InfluxDataSource in POST query mode', () => {
     const ctx: any = {
       //@ts-ignore