Handle VALUE function properly in JPQL queries.

See #3028

Author: gregturn

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

@@ -603,7 +603,8 @@ identification_variable
     | ORDER
     | OUTER
     | FLOOR
-    | SIGN)
+    | SIGN
+    | VALUE)
     ;
 
 constructor_name

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

@@ -1522,6 +1522,11 @@ void queryWithSignShouldWork() {
 		assertQuery("select t.sign from TestEntity t");
 	}
 
+	@Test // GH-3028
+	void queryWithValueShouldWork() {
+		assertQuery("select t.value from TestEntity t");
+	}
+
 	@Test // GH-3024
 	void castFunctionWithFqdnShouldWork() {
 		assertQuery("SELECT o FROM Order o WHERE CAST(:userId AS java.util.UUID) IS NULL OR o.user.id = :userId");

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

@@ -936,4 +936,9 @@ void floorShouldBeValidEntityName() {
 	void queryWithSignShouldWork() {
 		assertQuery("select t.sign from TestEntity t");
 	}
+
+	@Test // GH-3028
+	void queryWithValueShouldWork() {
+		assertQuery("select t.value from TestEntity t");
+	}
 }