[ML] AIOps: Adds expanded rows to pattern analysis table

x-pack/plugins/aiops/common/api/log_categorization/create_category_request.ts

@@ -15,7 +15,7 @@ import { createRandomSamplerWrapper } from '@kbn/ml-random-sampler-utils';
 import { createCategorizeQuery } from './create_categorize_query';
 
 const CATEGORY_LIMIT = 1000;
-const EXAMPLE_LIMIT = 1;
+const EXAMPLE_LIMIT = 4;
 
 export interface CategorizationAdditionalFilter {
   from: number;

x-pack/plugins/aiops/common/api/log_categorization/process_category_results.ts

@@ -47,6 +47,7 @@ export function processCategoryResults(
       subFieldExamples:
         b.sub_time_range?.buckets[0].examples.hits.hits.map((h) => get(h._source, field)) ??
         undefined,
+      regex: b.regex,
     };
   });
   return {

x-pack/plugins/aiops/common/api/log_categorization/types.ts

@@ -15,6 +15,7 @@ export interface Category {
   subFieldExamples?: string[];
   examples: string[];
   sparkline?: Record<number, number>;
+  regex: string;
 }
 
 interface CategoryExamples {
@@ -27,6 +28,7 @@ export interface CategoriesAgg {
       key: string;
       doc_count: number;
       examples: CategoryExamples;
+      regex: string;
       sparkline: {
         buckets: Array<{ key_as_string: string; key: number; doc_count: number }>;
       };

x-pack/plugins/aiops/public/application/utils/build_extended_base_filter_criteria.ts

@@ -50,6 +50,7 @@ export function buildExtendedBaseFilterCriteria(
               key,
               count: docCount,
               examples: [],
+              regex: '',
             },
           ])
         );
@@ -70,6 +71,7 @@ export function buildExtendedBaseFilterCriteria(
               key: `${selectedSignificantItem.key}`,
               count: selectedSignificantItem.doc_count,
               examples: [],
+              regex: '',
             },
           ])
         );
@@ -97,6 +99,7 @@ export function buildExtendedBaseFilterCriteria(
                 key: `${selectedSignificantItem.key}`,
                 count: selectedSignificantItem.doc_count,
                 examples: [],
+                regex: '',
               },
             ]),
           ],