[v9.5.x] Prometheus: Fix Query Inspector expression range value (#68019)

* Prometheus: Fix Query Inspector expression range value (#67919)

* Use metadata from respective query

* Unit test to cover having proper metadata for each query we run

(cherry picked from commit 69a38def63)

* Fix test

public/app/plugins/datasource/prometheus/result_transformer.test.ts

@@ -762,6 +762,60 @@ describe('Prometheus Result Transformer', () => {
       expect(transformedTableDataFrames[1].fields[1].values.toArray()).toEqual([]);
       expect(transformedTableDataFrames[1].fields[0].values.toArray()).toEqual([]);
     });
+
+    it('transforms dataframes with metadata resolving from their refIds', () => {
+      const value1 = 'value1';
+      const value2 = 'value2';
+      const executedQueryForRefA = 'Expr: avg_over_time(access_evaluation_duration_bucket[15s])\nStep: 15s';
+      const executedQueryForRefB = 'Expr: avg_over_time(access_evaluation_duration_bucket[5m])\nStep: 15s';
+
+      const dataframes = [
+        new MutableDataFrame({
+          refId: 'A',
+          meta: {
+            typeVersion: [0, 1],
+            custom: {
+              resultType: 'vector',
+            },
+            executedQueryString: executedQueryForRefA,
+          },
+          fields: [
+            { name: 'time', type: FieldType.time, values: [6, 5, 4] },
+            {
+              name: 'value',
+              type: FieldType.number,
+              values: [6, 5, 4],
+              labels: { label1: value1, label2: value2 },
+            },
+          ],
+        }),
+        new MutableDataFrame({
+          refId: 'B',
+          meta: {
+            typeVersion: [0, 1],
+            custom: {
+              resultType: 'vector',
+            },
+            executedQueryString: executedQueryForRefB,
+          },
+          fields: [
+            { name: 'time', type: FieldType.time, values: [6, 5, 4] },
+            {
+              name: 'value',
+              type: FieldType.number,
+              values: [6, 5, 4],
+              labels: { label1: value1, label2: value2 },
+            },
+          ],
+        }),
+      ];
+
+      const transformedTableDataFrames = transformDFToTable(dataframes);
+      expect(transformedTableDataFrames[0].meta).toBeTruthy();
+      expect(transformedTableDataFrames[1].meta).toBeTruthy();
+      expect(transformedTableDataFrames[0].meta?.executedQueryString).toEqual(executedQueryForRefA);
+      expect(transformedTableDataFrames[1].meta?.executedQueryString).toEqual(executedQueryForRefB);
+    });
   });
 
   describe('transform', () => {

public/app/plugins/datasource/prometheus/result_transformer.ts

@@ -231,7 +231,10 @@ export function transformDFToTable(dfs: DataFrame[]): DataFrame[] {
       refId,
       fields,
       // Prometheus specific UI for instant queries
-      meta: { ...dfs[0].meta, preferredVisualisationType: 'rawPrometheus' as PreferredVisualisationType },
+      meta: {
+        ...dataFramesByRefId[refId][0].meta,
+        preferredVisualisationType: 'rawPrometheus' as PreferredVisualisationType,
+      },
       length: timeField.values.length,
     };
   });