Fix EQL grammar to accept literals in constructor expressions.

Original Pull Request: #3695

spring-data-jpa/src/main/antlr4/org/springframework/data/jpa/repository/query/Eql.g4

@@ -215,6 +215,7 @@ constructor_item
     | scalar_expression
     | aggregate_expression
     | identification_variable
+    | literal
     ;
 
 aggregate_expression

spring-data-jpa/src/main/java/org/springframework/data/jpa/repository/query/EqlQueryRenderer.java

@@ -695,19 +695,19 @@ public QueryTokenStream visitConstructor_expression(EqlParser.Constructor_expres
 	@Override
 	public QueryTokenStream visitConstructor_item(EqlParser.Constructor_itemContext ctx) {
 
-		QueryRendererBuilder builder = QueryRenderer.builder();
-
 		if (ctx.single_valued_path_expression() != null) {
-			builder.append(visit(ctx.single_valued_path_expression()));
+			return visit(ctx.single_valued_path_expression());
 		} else if (ctx.scalar_expression() != null) {
-			builder.append(visit(ctx.scalar_expression()));
+			return visit(ctx.scalar_expression());
 		} else if (ctx.aggregate_expression() != null) {
-			builder.append(visit(ctx.aggregate_expression()));
+			return visit(ctx.aggregate_expression());
 		} else if (ctx.identification_variable() != null) {
-			builder.append(visit(ctx.identification_variable()));
+			return visit(ctx.identification_variable());
+		} else if (ctx.literal() != null) {
+			return visit(ctx.literal());
 		}
 
-		return builder;
+		return QueryTokenStream.empty();
 	}
 
 	@Override

spring-data-jpa/src/test/java/org/springframework/data/jpa/repository/query/EqlComplianceTests.java

@@ -134,6 +134,11 @@ void numericLiterals() {
 		assertQuery("SELECT s FROM Stat s WHERE s.ratio > 3.14e32D");
 	}
 
+	@Test // GH-3308
+	void newWithStrings() {
+		assertQuery("select new com.example.demo.SampleObject(se.id, se.sampleValue, \"java\") from SampleEntity se");
+	}
+
 	@Test
 	void orderByClause() {