fixed a bug where multiple SLA queries not handled correctly (#1910)

* fixed a bug where multiple SLA queries not handled correctly

* added test

src/datasource/responseHandler.spec.ts

@@ -0,0 +1,28 @@
+import { FieldType, MutableDataFrame, TIME_SERIES_TIME_FIELD_NAME } from '@grafana/data';
+import { convertToWide } from './responseHandler';
+
+describe('convertToWide', () => {
+  it('merge multiple SLI frames correctly', () => {
+    let frames = convertToWide([
+      new MutableDataFrame({
+        name: 'SLI',
+        fields: [
+          { name: TIME_SERIES_TIME_FIELD_NAME, values: [1], type: FieldType.time },
+          { name: TIME_SERIES_TIME_FIELD_NAME, values: [1.1], type: FieldType.number },
+        ],
+      }),
+      new MutableDataFrame({
+        name: 'SLI',
+        fields: [
+          { name: TIME_SERIES_TIME_FIELD_NAME, values: [1], type: FieldType.time },
+          { name: TIME_SERIES_TIME_FIELD_NAME, values: [1.2], type: FieldType.number },
+        ],
+      }),
+    ]);
+    expect(frames.length).toStrictEqual(1);
+    expect(frames[0].fields.length).toStrictEqual(3);
+    expect(frames[0].fields[0].values.at(0)).toStrictEqual(1);
+    expect(frames[0].fields[1].values.at(0)).toStrictEqual(1.1);
+    expect(frames[0].fields[2].values.at(0)).toStrictEqual(1.2);
+  });
+});

src/datasource/responseHandler.ts

@@ -377,7 +377,10 @@ export function convertToWide(data: MutableDataFrame[]): DataFrame[] {
   const fields: MutableField[] = [timeField];
 
   for (let i = 0; i < data.length; i++) {
-    const valueField = data[i].fields.find((f) => f.name === TIME_SERIES_VALUE_FIELD_NAME);
+    let valueField = data[i].fields.find((f) => f.name === TIME_SERIES_VALUE_FIELD_NAME);
+    if (data[i].name === 'SLI') {
+      valueField = data[i].fields.find((f) => f.type === FieldType.number);
+    }
     if (!valueField) {
       continue;
     }