Fix behavior for _index LIKE for ESQL

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

@@ -15,6 +15,8 @@
 import org.apache.lucene.search.MultiTermQuery;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.util.BytesRef;
+import org.apache.lucene.util.automaton.Automaton;
+import org.apache.lucene.util.automaton.CharacterRunAutomaton;
 import org.elasticsearch.common.lucene.search.Queries;
 import org.elasticsearch.common.regex.Regex;
 import org.elasticsearch.core.Nullable;
@@ -135,9 +137,33 @@ public final Query wildcardQuery(String value, boolean caseInsensitive, QueryRew
         }
     }
 
+    public Query wildcardLikeQuery(String value, boolean caseInsensitive, QueryRewriteContext context) {
+        return wildcardQuery(value, caseInsensitive, context);
+    }
+
     @Override
     public final boolean fieldHasValue(FieldInfos fieldInfos) {
         // We consider constant field types to always have value.
         return true;
     }
+
+    public abstract String getConstantFieldValue(SearchExecutionContext context);
+
+    @Override
+    public Query automatonQuery(
+        Automaton automaton,
+        @Nullable MultiTermQuery.RewriteMethod method,
+        SearchExecutionContext context,
+        String description
+    ) {
+        CharacterRunAutomaton compiled = new CharacterRunAutomaton(automaton);
+        boolean matches = compiled.run(getConstantFieldValue(context));
+        if (matches) {
+            return new MatchAllDocsQuery();
+        } else {
+            return new MatchNoDocsQuery(
+                "The \"" + context.getFullyQualifiedIndex().getName() + "\" query was rewritten to a \"match_none\" query."
+            );
+        }
+    }
 }

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

@@ -10,9 +10,13 @@
 package org.elasticsearch.index.mapper;
 
 import org.apache.lucene.search.MatchAllDocsQuery;
+import org.apache.lucene.search.MatchNoDocsQuery;
+import org.apache.lucene.search.MultiTermQuery;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.util.BytesRef;
 import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.regex.Regex;
+import org.elasticsearch.core.Nullable;
 import org.elasticsearch.index.fielddata.FieldData;
 import org.elasticsearch.index.fielddata.FieldDataContext;
 import org.elasticsearch.index.fielddata.IndexFieldData;
@@ -27,6 +31,7 @@
 
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 
 public class IndexFieldMapper extends MetadataFieldMapper {
 
@@ -102,6 +107,38 @@ public StoredFieldsSpec storedFieldsSpec() {
             };
         }
 
+        @Override
+        public Query wildcardLikeQuery(
+            String value,
+            @Nullable MultiTermQuery.RewriteMethod method,
+            boolean caseInsensitve,
+            SearchExecutionContext context
+        ) {
+            String indexName = context.getFullyQualifiedIndex().getName();
+            return getWildcardLikeQuery(value, caseInsensitve, indexName);
+        }
+
+        @Override
+        public Query wildcardLikeQuery(String value, boolean caseInsensitive, QueryRewriteContext context) {
+            String indexName = context.getFullyQualifiedIndex().getName();
+            return getWildcardLikeQuery(value, caseInsensitive, indexName);
+        }
+
+        private static Query getWildcardLikeQuery(String value, boolean caseInsensitve, String indexName) {
+            if (caseInsensitve) {
+                value = value.toLowerCase(Locale.ROOT);
+                indexName = indexName.toLowerCase(Locale.ROOT);
+            }
+            if (Regex.simpleMatch(value, indexName)) {
+                return new MatchAllDocsQuery();
+            }
+            return new MatchNoDocsQuery("The \"" + indexName + "\" query was rewritten to a \"match_none\" query.");
+        }
+
+        @Override
+        public String getConstantFieldValue(SearchExecutionContext context) {
+            return context.getFullyQualifiedIndex().getName();
+        }
     }
 
     public IndexFieldMapper() {

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

@@ -57,6 +57,11 @@ protected boolean matches(String pattern, boolean caseInsensitive, QueryRewriteC
             return Regex.simpleMatch(pattern, indexMode, caseInsensitive);
         }
 
+        @Override
+        public String getConstantFieldValue(SearchExecutionContext context) {
+            return context.getIndexSettings().getMode().getName();
+        }
+
         @Override
         public Query existsQuery(SearchExecutionContext context) {
             return new MatchAllDocsQuery();

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

@@ -24,6 +24,7 @@
 import org.apache.lucene.index.IndexReader;
 import org.apache.lucene.index.LeafReaderContext;
 import org.apache.lucene.index.MultiTerms;
+import org.apache.lucene.index.Term;
 import org.apache.lucene.index.Terms;
 import org.apache.lucene.index.TermsEnum;
 import org.apache.lucene.search.MultiTermQuery;
@@ -51,6 +52,7 @@
 import org.elasticsearch.index.fielddata.SourceValueFetcherSortedBinaryIndexFieldData;
 import org.elasticsearch.index.fielddata.StoredFieldSortedBinaryIndexFieldData;
 import org.elasticsearch.index.fielddata.plain.SortedSetOrdinalsIndexFieldData;
+import org.elasticsearch.index.query.AutomatonQueryWithDescription;
 import org.elasticsearch.index.query.SearchExecutionContext;
 import org.elasticsearch.index.similarity.SimilarityProvider;
 import org.elasticsearch.script.Script;
@@ -1042,6 +1044,15 @@ public IndexSortConfig getIndexSortConfig() {
         public boolean hasDocValuesSkipper() {
             return hasDocValuesSkipper;
         }
+
+        public Query automatonQuery(
+            Automaton automaton,
+            @Nullable MultiTermQuery.RewriteMethod method,
+            SearchExecutionContext context,
+            String description
+        ) {
+            return new AutomatonQueryWithDescription(new Term(name()), automaton, description);
+        }
     }
 
     private final boolean indexed;

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

@@ -25,6 +25,7 @@
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.TermQuery;
 import org.apache.lucene.util.BytesRef;
+import org.apache.lucene.util.automaton.Automaton;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.ElasticsearchParseException;
 import org.elasticsearch.cluster.metadata.IndexMetadata;
@@ -329,6 +330,15 @@ public final Query wildcardQuery(String value, @Nullable MultiTermQuery.RewriteM
         return wildcardQuery(value, method, false, context);
     }
 
+    public Query wildcardLikeQuery(
+        String value,
+        @Nullable MultiTermQuery.RewriteMethod method,
+        boolean caseInsensitve,
+        SearchExecutionContext context
+    ) {
+        return wildcardQuery(value, method, caseInsensitve, context);
+    }
+
     public Query wildcardQuery(
         String value,
         @Nullable MultiTermQuery.RewriteMethod method,
@@ -370,6 +380,18 @@ public Query regexpQuery(
         );
     }
 
+    public Query automatonQuery(
+        Automaton automaton,
+        @Nullable MultiTermQuery.RewriteMethod method,
+        SearchExecutionContext context,
+        String description
+    ) {
+        throw new QueryShardException(
+            context,
+            "Can only use automaton queries on keyword fields - not on [" + name + "] which is of type [" + typeName() + "]"
+        );
+    }
+
     public Query existsQuery(SearchExecutionContext context) {
         if (hasDocValues() || getTextSearchInfo().hasNorms()) {
             return new FieldExistsQuery(name());

server/src/main/java/org/elasticsearch/index/query/AutomatonQueryWithDescription.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+package org.elasticsearch.index.query;
+
+import org.apache.lucene.index.Term;
+import org.apache.lucene.search.AutomatonQuery;
+import org.apache.lucene.util.automaton.Automaton;
+
+public class AutomatonQueryWithDescription extends AutomatonQuery {
+    private final String description;
+
+    public AutomatonQueryWithDescription(Term term, Automaton automaton, String description) {
+        super(term, automaton);
+        this.description = description;
+    }
+
+    @Override
+    public String toString(String field) {
+        if (this.field.equals(field)) {
+            return description;
+        }
+        return this.field + ":" + description;
+    }
+}

server/src/main/java/org/elasticsearch/index/query/CoordinatorRewriteContext.java

@@ -72,6 +72,11 @@ protected boolean matches(String pattern, boolean caseInsensitive, QueryRewriteC
             return Regex.simpleMatch(pattern, tierPreference);
         }
 
+        @Override
+        public String getConstantFieldValue(SearchExecutionContext context) {
+            return context.getTierPreference();
+        }
+
         @Override
         public Query existsQuery(SearchExecutionContext context) {
             throw new UnsupportedOperationException("field exists query is not supported on the coordinator node");