feat: implement LIST indexing by ITEM for enhanced query capabilities

e2e-perf/src/test/java/com/arcadedb/test/performance/SingleServerLoadTestIT.java

@@ -87,7 +87,6 @@ void singleServerLoadTest(DatabaseWrapper.Protocol protocol) throws InterruptedE
       // Each thread will create friendships
       executor.submit(() -> {
         DatabaseWrapper db1 = new DatabaseWrapper(server, idSupplier, protocol);
-        ;
         db1.createLike(numOfLike);
         db1.close();
       });

e2e-perf/src/test/java/com/arcadedb/test/support/DatabaseWrapper.java

@@ -125,7 +125,9 @@ public void createSchema() {
 
             CREATE VERTEX TYPE Photo;
             CREATE PROPERTY Photo.id INTEGER;
+            CREATE PROPERTY Photo.tags LIST OF STRING;
             CREATE INDEX ON Photo (id) UNIQUE;
+            CREATE INDEX ON Photo (tags BY ITEM) NOTUNIQUE;
 
             CREATE EDGE TYPE HasUploaded;
 
@@ -192,17 +194,19 @@ private void addPhotosOfUser(int userId, int numberOfPhotos) {
     for (int i = 0; i < numberOfPhotos; i++) {
       int photoId = idSupplier.get();
       String photoName = String.format("download-%s.jpg", photoId);
+      String tag1 = "tag" + i % numberOfPhotos;
+      String tag2 = "tag" + (i % numberOfPhotos + 1);
       String sqlScript = """
           BEGIN;
           LOCK TYPE User, Photo, HasUploaded;
-          LET photo = CREATE VERTEX Photo SET id = ?, name = ?;
+          LET photo = CREATE VERTEX Photo SET id = ?, name = ?, tags = ['?', '?'];
           LET user = SELECT FROM User WHERE id = ?;
           CREATE EDGE HasUploaded FROM $user TO $photo;
           COMMIT RETRY 30;
           """;
       try {
         photosTimer.record(() -> {
-              db.command("sqlscript", sqlScript, photoId, photoName, userId);
+              db.command("sqlscript", sqlScript, photoId, photoName, userId, tag1, tag2);
             }
         );
 

e2e/src/test/java/com/arcadedb/e2e/JdbcQueriesTest.java

@@ -159,7 +159,8 @@ void createSchemaWithSqlScript() throws SQLException {
           CREATE PROPERTY article.comment IF NOT EXISTS LIST OF comment;
           CREATE PROPERTY article.location IF NOT EXISTS EMBEDDED OF location;
 
-          CREATE INDEX IF NOT EXISTS on article(id) UNIQUE;
+          CREATE INDEX IF NOT EXISTS on article (id) UNIQUE;
+          CREATE INDEX IF NOT EXISTS on article (tags BY ITEM) NOTUNIQUE;
           """);
 
       st.execute("""

e2e/src/test/java/com/arcadedb/e2e/RemoteGrpcDatabaseTest.java

@@ -34,12 +34,11 @@
 public class RemoteGrpcDatabaseTest extends ArcadeContainerTemplate {
 
   private RemoteGrpcDatabase database;
-  private RemoteGrpcServer   server;
 
   @BeforeEach
   void setUp() {
 
-    server = new RemoteGrpcServer(host, grpcPort, "root", "playwithdata", true, List.of());
+    RemoteGrpcServer server = new RemoteGrpcServer(host, grpcPort, "root", "playwithdata", true, List.of());
     database = new RemoteGrpcDatabase(server, host, grpcPort, httpPort, "beer", "root", "playwithdata");
     // ENLARGE THE TIMEOUT TO PASS THESE TESTS ON CI (GITHUB ACTIONS)
     database.setTimeout(60_000);
@@ -53,27 +52,21 @@ void tearDown() {
 
   @Test
   void simpleSQLQuery() {
-    database.transaction(() -> {
-      final ResultSet result = database.query("SQL", "select * from Beer limit 10");
-      assertThat(CollectionUtils.countEntries(result)).isEqualTo(10);
-    }, true, 10);
+    final ResultSet result = database.query("SQL", "select * from Beer limit 10");
+    assertThat(CollectionUtils.countEntries(result)).isEqualTo(10);
   }
 
   @Test
   @Disabled("Gremlin not supported yet")
   void simpleGremlinQuery() {
-    database.transaction(() -> {
-      final ResultSet result = database.query("gremlin", "g.V().limit(10)");
-      assertThat(CollectionUtils.countEntries(result)).isEqualTo(10);
-    }, false, 10);
+    final ResultSet result = database.query("gremlin", "g.V().limit(10)");
+    assertThat(CollectionUtils.countEntries(result)).isEqualTo(10);
   }
 
   @Test
   @Disabled("Cypher not supported yet")
   void simpleCypherQuery() {
-    database.transaction(() -> {
-      final ResultSet result = database.query("cypher", "MATCH(p:Beer) RETURN * LIMIT 10");
-      assertThat(CollectionUtils.countEntries(result)).isEqualTo(10);
-    }, false, 10);
+    final ResultSet result = database.query("cypher", "MATCH(p:Beer) RETURN * LIMIT 10");
+    assertThat(CollectionUtils.countEntries(result)).isEqualTo(10);
   }
 }

engine/src/main/grammar/SQLGrammar.jjt

@@ -409,6 +409,7 @@ TOKEN :
   | <CONTAINSTEXT: ("C"|"c")("O"|"o")("N"|"n")("T"|"t")("A"|"a")("I"|"i")("N"|"n")("S"|"s")("T"|"t")("E"|"e")("X"|"x")("T"|"t") >
   | <MATCHES: ("M"|"m")("A"|"a")("T"|"t")("C"|"c")("H"|"h")("E"|"e")("S"|"s") >
   | <KEY: ("K"|"k")("E"|"e")("Y"|"y") >
+  | <ITEM: ("I"|"i")("T"|"t")("E"|"e")("M"|"m") >
   | <INSTANCEOF: ("I"|"i")("N"|"n")("S"|"s")("T"|"t")("A"|"a")("N"|"n")("C"|"c")("E"|"e")("O"|"o")("F"|"f") >
 }
 
@@ -500,6 +501,7 @@ Rid Rid():
   { return jjtThis; }
 }
 
+
 BucketIdentifier BucketIdentifier():
 {}
 {
@@ -589,6 +591,7 @@ Identifier Identifier():
   | token = <MERGE>
   | token = <CONTENT>
   | token = <KEY>
+  | token = <ITEM>
   | token = <OF>
   | token = <OFFSET>
   | token = <VALUE>
@@ -3566,6 +3569,8 @@ CreateIndexStatement CreateIndexStatement():
             <KEY> { lastProperty.byKey = true; }
             |
             <VALUE> { lastProperty.byValue = true; }
+            |
+            <ITEM> { lastProperty.byItem = true; }
           )
         ]
         (
@@ -3589,6 +3594,8 @@ CreateIndexStatement CreateIndexStatement():
               <KEY> { lastProperty.byKey = true; }
               |
               <VALUE> { lastProperty.byValue = true; }
+              |
+              <ITEM> { lastProperty.byItem = true; }
             )
           ]
         )*