fix: prevent empty like clause for search parameters (#1353)

Reference: #1344
Do not send empty search parameters, rather only send them when non empty values are present

Author: jaywalker21

projects/observability/src/shared/dashboard/widgets/table/table-widget-renderer.component.ts

@@ -470,12 +470,18 @@ export class TableWidgetRendererComponent
   }
 
   public onSearchChange(text: string): void {
-    const searchFilter: TableFilter = {
-      field: this.api.model.getSearchAttribute()!,
-      operator: FilterOperator.Like,
-      value: text
-    };
-    this.searchFilterSubject.next([searchFilter]);
+    let searchFilters: TableFilter[] = [];
+    // In case of empty string, avoid sending LIKE operator with empty value
+    if (isNonEmptyString(text)) {
+      searchFilters = [
+        {
+          field: this.api.model.getSearchAttribute()!,
+          operator: FilterOperator.Like,
+          value: text
+        }
+      ];
+    }
+    this.searchFilterSubject.next(searchFilters);
   }
 
   public onViewChange(view: string): void {