diff --git a/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.searchsource.md b/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.searchsource.md
index b2382d35f7d76..1cee2e888fd40 100644
--- a/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.searchsource.md
+++ b/docs/development/plugins/data/public/kibana-plugin-plugins-data-public.searchsource.md
@@ -34,6 +34,7 @@ export declare class SearchSource
 |  [destroy()](./kibana-plugin-plugins-data-public.searchsource.destroy.md) |  | Completely destroy the SearchSource.  {<!-- -->undefined<!-- -->} |
 |  [fetch(options)](./kibana-plugin-plugins-data-public.searchsource.fetch.md) |  | Fetch this source and reject the returned Promise on error |
 |  [fetch$(options)](./kibana-plugin-plugins-data-public.searchsource.fetch_.md) |  | Fetch this source from Elasticsearch, returning an observable over the response(s) |
+|  [flatten()](./kibana-plugin-plugins-data-public.searchsource.flatten.md) |  |  |
 |  [getField(field, recurse)](./kibana-plugin-plugins-data-public.searchsource.getfield.md) |  | Gets a single field from the fields |
 |  [getFields()](./kibana-plugin-plugins-data-public.searchsource.getfields.md) |  | returns all search source fields |
 |  [getId()](./kibana-plugin-plugins-data-public.searchsource.getid.md) |  | returns search source id |
diff --git a/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.md b/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.md
index 491babcdfdecf..235f80f2fbdff 100644
--- a/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.md
+++ b/docs/development/plugins/data/server/kibana-plugin-plugins-data-server.md
@@ -52,6 +52,7 @@
 |  [IFieldSubType](./kibana-plugin-plugins-data-server.ifieldsubtype.md) |  |
 |  [IFieldType](./kibana-plugin-plugins-data-server.ifieldtype.md) |  |
 |  [IndexPatternAttributes](./kibana-plugin-plugins-data-server.indexpatternattributes.md) | Interface for an index pattern saved object |
+|  [IScopedSearchClient](./kibana-plugin-plugins-data-server.iscopedsearchclient.md) |  |
 |  [ISearchOptions](./kibana-plugin-plugins-data-server.isearchoptions.md) |  |
 |  [ISearchSessionService](./kibana-plugin-plugins-data-server.isearchsessionservice.md) |  |
 |  [ISearchSetup](./kibana-plugin-plugins-data-server.isearchsetup.md) |  |
diff --git a/src/plugins/data/public/public.api.md b/src/plugins/data/public/public.api.md
index 9720395881ea3..0f5c275f9c919 100644
--- a/src/plugins/data/public/public.api.md
+++ b/src/plugins/data/public/public.api.md
@@ -2389,6 +2389,8 @@ export class SearchSource {
     fetch$(options?: ISearchOptions): import("rxjs").Observable<import("elasticsearch").SearchResponse<any>>;
     // @deprecated
     fetch(options?: ISearchOptions): Promise<import("elasticsearch").SearchResponse<any>>;
+    // (undocumented)
+    flatten(): Record<string, any>;
     getField<K extends keyof SearchSourceFields>(field: K, recurse?: boolean): SearchSourceFields[K];
     getFields(): SearchSourceFields;
     getId(): string;
diff --git a/src/plugins/data/server/server.api.md b/src/plugins/data/server/server.api.md
index ec5ae2f129057..ec0579652dc99 100644
--- a/src/plugins/data/server/server.api.md
+++ b/src/plugins/data/server/server.api.md
@@ -951,6 +951,29 @@ export class IndexPatternsServiceProvider implements Plugin_3<void, IndexPattern
     };
 }
 
+// Warning: (ae-forgotten-export) The symbol "ISearchClient" needs to be exported by the entry point index.d.ts
+// Warning: (ae-missing-release-tag) "IScopedSearchClient" is exported by the package, but it is missing a release tag (@alpha, @beta, @public, or @internal)
+//
+// @public (undocumented)
+export interface IScopedSearchClient extends ISearchClient {
+    // (undocumented)
+    cancelSession: IScopedSearchSessionsClient['cancel'];
+    // (undocumented)
+    deleteSession: IScopedSearchSessionsClient['delete'];
+    // (undocumented)
+    extendSession: IScopedSearchSessionsClient['extend'];
+    // (undocumented)
+    findSessions: IScopedSearchSessionsClient['find'];
+    // (undocumented)
+    getSession: IScopedSearchSessionsClient['get'];
+    // Warning: (ae-forgotten-export) The symbol "IScopedSearchSessionsClient" needs to be exported by the entry point index.d.ts
+    //
+    // (undocumented)
+    saveSession: IScopedSearchSessionsClient['save'];
+    // (undocumented)
+    updateSession: IScopedSearchSessionsClient['update'];
+}
+
 // Warning: (ae-missing-release-tag) "ISearchOptions" is exported by the package, but it is missing a release tag (@alpha, @beta, @public, or @internal)
 //
 // @public (undocumented)
@@ -968,8 +991,6 @@ export interface ISearchOptions {
 //
 // @public (undocumented)
 export interface ISearchSessionService<T = unknown> {
-    // Warning: (ae-forgotten-export) The symbol "IScopedSearchSessionsClient" needs to be exported by the entry point index.d.ts
-    //
     // (undocumented)
     asScopedProvider: (core: CoreStart) => (request: KibanaRequest) => IScopedSearchSessionsClient<T>;
 }
@@ -998,8 +1019,6 @@ export interface ISearchStart<SearchStrategyRequest extends IKibanaSearchRequest
     //
     // (undocumented)
     aggs: AggsStart;
-    // Warning: (ae-forgotten-export) The symbol "IScopedSearchClient" needs to be exported by the entry point index.d.ts
-    //
     // (undocumented)
     asScoped: (request: KibanaRequest_2) => IScopedSearchClient;
     getSearchStrategy: (name?: string) => ISearchStrategy<SearchStrategyRequest, SearchStrategyResponse>;
@@ -1463,20 +1482,20 @@ export function usageProvider(core: CoreSetup_2): SearchUsage;
 // src/plugins/data/server/index.ts:101:26 - (ae-forgotten-export) The symbol "HistogramFormat" needs to be exported by the entry point index.d.ts
 // src/plugins/data/server/index.ts:128:27 - (ae-forgotten-export) The symbol "isFilterable" needs to be exported by the entry point index.d.ts
 // src/plugins/data/server/index.ts:128:27 - (ae-forgotten-export) The symbol "isNestedField" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:243:20 - (ae-forgotten-export) The symbol "getRequestInspectorStats" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:243:20 - (ae-forgotten-export) The symbol "getResponseInspectorStats" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:243:20 - (ae-forgotten-export) The symbol "tabifyAggResponse" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:243:20 - (ae-forgotten-export) The symbol "tabifyGetColumns" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:245:1 - (ae-forgotten-export) The symbol "CidrMask" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:246:1 - (ae-forgotten-export) The symbol "dateHistogramInterval" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:255:1 - (ae-forgotten-export) The symbol "InvalidEsCalendarIntervalError" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:256:1 - (ae-forgotten-export) The symbol "InvalidEsIntervalFormatError" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:257:1 - (ae-forgotten-export) The symbol "Ipv4Address" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:261:1 - (ae-forgotten-export) The symbol "isValidEsInterval" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:262:1 - (ae-forgotten-export) The symbol "isValidInterval" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:266:1 - (ae-forgotten-export) The symbol "propFilter" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:269:1 - (ae-forgotten-export) The symbol "toAbsoluteDates" needs to be exported by the entry point index.d.ts
-// src/plugins/data/server/index.ts:270:1 - (ae-forgotten-export) The symbol "calcAutoIntervalLessThan" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:244:20 - (ae-forgotten-export) The symbol "getRequestInspectorStats" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:244:20 - (ae-forgotten-export) The symbol "getResponseInspectorStats" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:244:20 - (ae-forgotten-export) The symbol "tabifyAggResponse" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:244:20 - (ae-forgotten-export) The symbol "tabifyGetColumns" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:246:1 - (ae-forgotten-export) The symbol "CidrMask" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:247:1 - (ae-forgotten-export) The symbol "dateHistogramInterval" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:256:1 - (ae-forgotten-export) The symbol "InvalidEsCalendarIntervalError" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:257:1 - (ae-forgotten-export) The symbol "InvalidEsIntervalFormatError" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:258:1 - (ae-forgotten-export) The symbol "Ipv4Address" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:262:1 - (ae-forgotten-export) The symbol "isValidEsInterval" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:263:1 - (ae-forgotten-export) The symbol "isValidInterval" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:267:1 - (ae-forgotten-export) The symbol "propFilter" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:270:1 - (ae-forgotten-export) The symbol "toAbsoluteDates" needs to be exported by the entry point index.d.ts
+// src/plugins/data/server/index.ts:271:1 - (ae-forgotten-export) The symbol "calcAutoIntervalLessThan" needs to be exported by the entry point index.d.ts
 // src/plugins/data/server/plugin.ts:79:74 - (ae-forgotten-export) The symbol "DataEnhancements" needs to be exported by the entry point index.d.ts
 // src/plugins/data/server/search/types.ts:114:5 - (ae-forgotten-export) The symbol "ISearchStartSearchSource" needs to be exported by the entry point index.d.ts
 
diff --git a/x-pack/test/reporting_api_integration/reporting_and_security/__snapshots__/csv_searchsource_immediate.snap b/x-pack/test/reporting_api_integration/reporting_and_security/__snapshots__/csv_searchsource_immediate.snap
index ff7ce7f5fedfb..f560a6c55ce9a 100644
--- a/x-pack/test/reporting_api_integration/reporting_and_security/__snapshots__/csv_searchsource_immediate.snap
+++ b/x-pack/test/reporting_api_integration/reporting_and_security/__snapshots__/csv_searchsource_immediate.snap
@@ -15,7 +15,7 @@ exports[`Reporting APIs CSV generation from SearchSource date formatting Formatt
 `;
 
 exports[`Reporting APIs CSV generation from SearchSource date formatting With filters and timebased data, custom timezone (Phoenix) 1`] = `
-"\\"'@timestamp\\",clientip,extension
+"\\"@timestamp\\",clientip,extension
 \\"Sep 20, 2015 @ 03:26:48.725\\",\\"74.214.76.90\\",jpg
 \\"Sep 20, 2015 @ 03:26:48.540\\",\\"146.86.123.109\\",jpg
 \\"Sep 20, 2015 @ 03:26:48.353\\",\\"233.126.159.144\\",jpg
@@ -75,7 +75,7 @@ exports[`Reporting APIs CSV generation from SearchSource date formatting With fi
 `;
 
 exports[`Reporting APIs CSV generation from SearchSource date formatting With filters and timebased data, default to UTC 1`] = `
-"\\"'@timestamp\\",clientip,extension
+"\\"@timestamp\\",clientip,extension
 \\"Sep 20, 2015 @ 10:26:48.725\\",\\"74.214.76.90\\",jpg
 \\"Sep 20, 2015 @ 10:26:48.540\\",\\"146.86.123.109\\",jpg
 \\"Sep 20, 2015 @ 10:26:48.353\\",\\"233.126.159.144\\",jpg
@@ -135,7 +135,7 @@ exports[`Reporting APIs CSV generation from SearchSource date formatting With fi
 `;
 
 exports[`Reporting APIs CSV generation from SearchSource date formatting With filters and timebased data, explicit UTC format 1`] = `
-"\\"'@timestamp\\",clientip,extension
+"\\"@timestamp\\",clientip,extension
 \\"Sep 20, 2015 @ 10:26:48.725\\",\\"74.214.76.90\\",jpg
 \\"Sep 20, 2015 @ 10:26:48.540\\",\\"146.86.123.109\\",jpg
 \\"Sep 20, 2015 @ 10:26:48.353\\",\\"233.126.159.144\\",jpg