[Vega] Add Filter custom label for opensearchDashboardsAddFilter (ope…

…nsearch-project#3640)

* [Vega] Add Filter custom label for opensearchDashboardsAddFilter

Signed-off-by: Aswath <it.aswath@gmail.com>

Co-authored-by: Josh Romero <rmerqg@amazon.com>

---------

Signed-off-by: Aswath <it.aswath@gmail.com>
Co-authored-by: Josh Romero <rmerqg@amazon.com>
Signed-off-by: David Sinclair <david@sinclair.tech>

CHANGELOG.md

@@ -109,6 +109,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [Region Maps] Add ui setting to configure custom vector map's size parameter([#3399](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3399))
 - [Search Telemetry] Fixes search telemetry's observable object that won't be GC-ed([#3390](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3390))
 - Clean up and rebuild `@osd/pm` ([#3570](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3570))
+- [Vega] Add Filter custom label for opensearchDashboardsAddFilter ([#3640](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3640))
 
 ### 🚞 Infrastructure
 

src/plugins/vis_type_vega/public/vega_view/vega_base_view.js

@@ -315,10 +315,15 @@ export class VegaBaseView {
   /**
    * @param {object} query Query DSL snippet, as used in the query DSL editor
    * @param {string} [index] as defined in OpenSearch Dashboards, or default if missing
+   * @param {string} alias OpenSearch Query DSL's custom label for `opensearchDashboardsAddFilter`, as used in '+ Add Filter'
    */
-  async addFilterHandler(query, index) {
+  async addFilterHandler(query, index, alias) {
     const indexId = await this.findIndex(Utils.handleNonStringIndex(index));
-    const filter = opensearchFilters.buildQueryFilter(Utils.handleInvalidQuery(query), indexId);
+    const filter = opensearchFilters.buildQueryFilter(
+      Utils.handleInvalidQuery(query),
+      indexId,
+      alias
+    );
     this._applyFilter({ filters: [filter] });
   }