[DataView] show empty matching sources when no matched index pattern

src/plugins/data_view_editor/public/components/preview_panel/preview_panel.tsx

@@ -64,11 +64,11 @@ export const PreviewPanel = ({ type, allowHidden, title = '', matchedIndices$ }:
     currentViewMode = ViewMode.allIndices;
   }
 
-  const indicesListContent = currentlyVisibleIndices.length ? (
+  const indicesListContent = matched.allIndices ? (
     <IndicesList
       data-test-subj="createIndexPatternStep1IndicesList"
       query={title}
-      indices={currentlyVisibleIndices}
+      indices={currentlyVisibleIndices.length ? currentlyVisibleIndices : matched.allIndices}
       isExactMatch={(indexName) =>
         title.length > 0 && matched.exactMatchedIndices.some((index) => index.name === indexName)
       }

src/plugins/data_view_editor/public/lib/get_matched_indices.test.ts

@@ -99,9 +99,9 @@ describe('getMatchedIndices', () => {
     ]);
   });
 
-  it('should return all indices as visible if there are no exact or partial', () => {
+  it('should return empty array if there are no exact or partial', () => {
     const { visibleIndices } = getMatchedIndices(indices, [], [], true);
 
-    expect(visibleIndices).toEqual(indices);
+    expect(visibleIndices).toEqual([]);
   });
 });

src/plugins/data_view_editor/public/lib/get_matched_indices.ts

@@ -74,14 +74,14 @@ export function getMatchedIndices(
   // 1) If there are exact matches, show those as the query is good to go
   // 2) If there are no exact matches, but there are partial matches,
   // show the partial matches
-  // 3) If there are no exact or partial matches, just show all indices
-  let visibleIndices;
+  // 3) If there are no exact or partial matches, show empty indices
+  let visibleIndices: MatchedItem[];
   if (exactMatchedIndices.length) {
     visibleIndices = exactMatchedIndices;
   } else if (partialMatchedIndices.length) {
     visibleIndices = partialMatchedIndices;
   } else {
-    visibleIndices = allIndices;
+    visibleIndices = [];
   }
 
   return {