Don't override originalQuery with request filters

These filters leak into highlighting and probably other places and cause
things like the type name to be highlighted when using
requireFieldMatch=false. We could have special hacks to keep them out of
highlighting but it feals better to keep them out of any variable named
"originalQuery".

Closes #15689

core/src/main/java/org/elasticsearch/action/admin/indices/validate/query/TransportValidateQueryAction.java

@@ -182,11 +182,10 @@ public class TransportValidateQueryAction extends TransportBroadcastAction<Valid
             searchContext.preProcess();
 
             valid = true;
-            if (request.explain()) {
-                explanation = searchContext.parsedQuery().query().toString();
-            }
             if (request.rewrite()) {
                 explanation = getRewrittenQuery(searcher.searcher(), searchContext.query());
+            } else if (request.explain()) {
+                explanation = searchContext.filteredQuery().query().toString();
             }
         } catch (QueryShardException|ParsingException e) {
             valid = false;

core/src/main/java/org/elasticsearch/search/internal/DefaultSearchContext.java

@@ -125,7 +125,20 @@ public class DefaultSearchContext extends SearchContext {
     private Sort sort;
     private Float minimumScore;
     private boolean trackScores = false; // when sorting, track scores as well...
+    /**
+     * The original query as sent by the user without the types and aliases
+     * applied. Putting things in here leaks them into highlighting so don't add
+     * things like the type filter or alias filters.
+     */
     private ParsedQuery originalQuery;
+    /**
+     * Just like originalQuery but with the filters from types and aliases
+     * applied.
+     */
+    private ParsedQuery filteredQuery;
+    /**
+     * The query to actually execute.
+     */
     private Query query;
     private ParsedQuery postFilter;
     private Query aliasFilter;
@@ -209,22 +222,7 @@ public class DefaultSearchContext extends SearchContext {
         if (queryBoost() != AbstractQueryBuilder.DEFAULT_BOOST) {
             parsedQuery(new ParsedQuery(new FunctionScoreQuery(query(), new WeightFactorFunction(queryBoost)), parsedQuery()));
         }
-        Query searchFilter = searchFilter(types());
-        if (searchFilter != null) {
-            if (Queries.isConstantMatchAllQuery(query())) {
-                Query q = new ConstantScoreQuery(searchFilter);
-                if (query().getBoost() != AbstractQueryBuilder.DEFAULT_BOOST) {
-                    q = new BoostQuery(q, query().getBoost());
-                }
-                parsedQuery(new ParsedQuery(q, parsedQuery()));
-            } else {
-                BooleanQuery filtered = new BooleanQuery.Builder()
-                    .add(query(), Occur.MUST)
-                    .add(searchFilter, Occur.FILTER)
-                    .build();
-                parsedQuery(new ParsedQuery(filtered, parsedQuery()));
-            }
-        }
+        filteredQuery(buildFilteredQuery());
         try {
             this.query = searcher().rewrite(this.query);
         } catch (IOException e) {
@@ -232,6 +230,26 @@ public class DefaultSearchContext extends SearchContext {
         }
     }
 
+    private ParsedQuery buildFilteredQuery() {
+        Query searchFilter = searchFilter(types());
+        if (searchFilter == null) {
+            return originalQuery;
+        }
+        Query result;
+        if (Queries.isConstantMatchAllQuery(query())) {
+            result = new ConstantScoreQuery(searchFilter);
+            if (query().getBoost() != AbstractQueryBuilder.DEFAULT_BOOST) {
+                result = new BoostQuery(result, query().getBoost());
+            }
+        } else {
+            result = new BooleanQuery.Builder()
+                    .add(query, Occur.MUST)
+                    .add(searchFilter, Occur.FILTER)
+                    .build();
+        }
+        return new ParsedQuery(result, originalQuery);
+    }
+
     @Override
     public Query searchFilter(String[] types) {
         Query filter = mapperService().searchFilter(types);
@@ -546,6 +564,15 @@ public class DefaultSearchContext extends SearchContext {
         return this;
     }
 
+    public ParsedQuery filteredQuery() {
+        return filteredQuery;
+    }
+
+    private void filteredQuery(ParsedQuery filteredQuery) {
+        this.filteredQuery = filteredQuery;
+        this.query = filteredQuery.query();
+    }
+
     @Override
     public ParsedQuery parsedQuery() {
         return this.originalQuery;

core/src/test/java/org/elasticsearch/search/highlight/HighlighterSearchIT.java

@@ -2571,7 +2571,6 @@ public class HighlighterSearchIT extends ESIntegTestCase {
         }
     }
 
-
     @AwaitsFix(bugUrl="Broken now that BoostingQuery does not extend BooleanQuery anymore")
     public void testFastVectorHighlighterPhraseBoost() throws Exception {
         assertAcked(prepareCreate("test").addMapping("type1", type1TermVectorMapping()));

core/src/test/java/org/elasticsearch/validate/SimpleValidateQueryIT.java

@@ -105,7 +105,7 @@ public class SimpleValidateQueryIT extends ESIntegTestCase {
         }
 
         for (Client client : internalCluster()) {
-                ValidateQueryResponse response = client.admin().indices().prepareValidateQuery("test")
+            ValidateQueryResponse response = client.admin().indices().prepareValidateQuery("test")
                     .setQuery(QueryBuilders.queryStringQuery("foo"))
                     .setExplain(true)
                     .execute().actionGet();