Index phrases

docs/CHANGELOG.asciidoc

@@ -150,6 +150,9 @@ option. ({pull}30140[#29658])
 A new analysis plugin called `analysis_nori` that exposes the Lucene Korean
 analysis module.  ({pull}30397[#30397])
 
+Text fields now have an `index_phrases` parameter that allows faster phrase queries
+at the expense of a larger index ({pull}30450[#30450])
+
 [float]
 === Enhancements
 

docs/reference/mapping/types/text.asciidoc

@@ -96,6 +96,12 @@ The following parameters are accepted by `text` fields:
     the expense of a larger index. Accepts an
     <<index-prefix-config,`index-prefix configuration block`>>
 
+<<index-phrases,`index_phrases`>>::
+
+    If enabled, two-term word combinations ('shingles') are indexed into a separate
+    field.  This allows phrase queries to run more efficiently, at the expense
+    of a larger index.  Accepts `true` or `false` (default).
+
 <<norms,`norms`>>::
 
     Whether field-length should be taken into account when scoring queries.

plugins/analysis-icu/src/main/java/org/elasticsearch/index/analysis/IcuTokenizerFactory.java

@@ -80,7 +80,7 @@ private ICUTokenizerConfig getIcuConfig(Environment env, Settings settings) {
             if (tailored.isEmpty()) {
                 return null;
             } else {
-                final BreakIterator breakers[] = new BreakIterator[UScript.CODE_LIMIT];
+                final RuleBasedBreakIterator breakers[] = new RuleBasedBreakIterator[UScript.CODE_LIMIT];
                 for (Map.Entry<Integer, String> entry : tailored.entrySet()) {
                     int code = entry.getKey();
                     String resourcePath = entry.getValue();
@@ -105,7 +105,7 @@ public RuleBasedBreakIterator getBreakIterator(int script) {
     }
 
     //parse a single RBBi rule file
-    private BreakIterator parseRules(String filename, Environment env) throws IOException {
+    private RuleBasedBreakIterator parseRules(String filename, Environment env) throws IOException {
 
         final Path path = env.configFile().resolve(filename);
         String rules = Files.readAllLines(path)

rest-api-spec/src/main/resources/rest-api-spec/test/search/200_index_phrase_search.yml

@@ -0,0 +1,67 @@
+---
+"search with indexed phrases":
+  - skip:
+      version: " - 6.99.99"
+      reason: index_phrase is only available as of 7.0.0
+  - do:
+      indices.create:
+        index:  test
+        body:
+          mappings:
+            test:
+              properties:
+                text:
+                  type: text
+                  index_phrases: true
+
+  - do:
+      index:
+          index:  test
+          type:   test
+          id:     1
+          body:   { text: "peter piper picked a peck of pickled peppers" }
+
+  - do:
+      indices.refresh:
+        index: [test]
+
+  - do:
+      search:
+        index: test
+        body:
+          query:
+            match_phrase:
+              text:
+                query: "peter piper"
+
+  - match: {hits.total: 1}
+
+  - do:
+      search:
+        index: test
+        q: '"peter piper"~1'
+        df: text
+
+  - match: {hits.total: 1}
+
+  - do:
+      search:
+        index: test
+        body:
+          query:
+            match_phrase:
+              text: "peter piper picked"
+
+  - match: {hits.total: 1}
+
+  - do:
+      search:
+        index: test
+        body:
+          query:
+            match_phrase:
+              text: "piper"
+
+  - match: {hits.total: 1}
+
+

server/src/main/java/org/elasticsearch/index/mapper/MappedFieldType.java

@@ -43,6 +43,7 @@
 import org.elasticsearch.index.query.QueryRewriteContext;
 import org.elasticsearch.index.query.QueryShardContext;
 import org.elasticsearch.index.query.QueryShardException;
+import org.elasticsearch.index.search.MatchQuery;
 import org.elasticsearch.index.similarity.SimilarityProvider;
 import org.elasticsearch.search.DocValueFormat;
 import org.joda.time.DateTimeZone;
@@ -360,6 +361,10 @@ public Query nullValueQuery() {
 
     public abstract Query existsQuery(QueryShardContext context);
 
+    public MatchQuery matchQuery(QueryShardContext context, String analyzer, int slop) {
+        throw new QueryShardException(context, "Can only use match queries on keyword and text fields - not on [" + name + "] which is of type [" + typeName() + "]");
+    }
+
     /**
      * An enum used to describe the relation between the range of terms in a
      * shard when compared with a query range