MC-21228: Support partial word search in Elasticsearch

- Fixed integration failures

Author: Prabhu Ram

app/code/Magento/CatalogSearch/etc/search_request.xml

@@ -14,12 +14,16 @@
         <queries>
             <query xsi:type="boolQuery" name="quick_search_container" boost="1">
                 <queryReference clause="should" ref="search" />
+                <queryReference clause="should" ref="partial_search" />
                 <queryReference clause="must" ref="category"/>
                 <queryReference clause="must" ref="price"/>
                 <queryReference clause="must" ref="visibility"/>
             </query>
             <query xsi:type="matchQuery" value="$search_term$" name="search">
                 <match field="*"/>
+            </query>
+            <query xsi:type="matchQuery" value="$search_term$" name="partial_search">
+                <match field="*"/>
                 <match field="name" matchCondition="match_phrase_prefix"/>
                 <match field="sku" matchCondition="match_phrase_prefix"/>
             </query>

app/code/Magento/Elasticsearch/SearchAdapter/Query/Builder/Match.php

@@ -83,7 +83,7 @@ public function build(array $selectQuery, RequestQueryInterface $requestQuery, $
             $matchKey = array_keys($queryBody)[0];
             foreach ($queryBody[$matchKey] as $field => $matchQuery) {
                 $matchQuery['boost'] = $requestQueryBoost + $matchQuery['boost'];
-                if ($minimumShouldMatch) {
+                if ($minimumShouldMatch && $matchKey != 'match_phrase_prefix') {
                     $matchQuery['minimum_should_match'] = $minimumShouldMatch;
                 }
                 $queryBody[$matchKey][$field] = $matchQuery;