Fix Hql-Queries using CEILING and LN.

Closes #3711

Author: coderesting

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

@@ -25,7 +25,7 @@ grammar Hql;
  * management of complex rules in the generated Visitor. Finally, there are labels applied to rule elements (op=('+'|'-')
  * to simplify the processing.
  *
- * @author Greg Turnquist
+ * @author Greg Turnquist, Yannick Brandt
  * @since 3.1
  */
 }
@@ -1133,6 +1133,7 @@ reservedWord
     | BY
     | CASE
     | CAST
+    | CEILING
     | COLLATE
     | CONTAINS
     | COUNT
@@ -1206,6 +1207,7 @@ reservedWord
     | LIMIT
     | LIST
     | LISTAGG
+    | LN
     | LOCAL
     | LOCAL_DATE
     | LOCAL_DATETIME

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

@@ -37,7 +37,7 @@
  *
  * @author Greg Turnquist
  * @author Christoph Strobl
- * @author Mark Paluch
+ * @author Mark Paluch, Yannick Brandt
  * @since 3.1
  */
 class HqlQueryRendererTests {
@@ -1509,6 +1509,16 @@ select round(count(ri) * 100 / max(ri.receipt.positions), 0) as perc
 		});
 	}
 
+	@Test
+	void ceilingFunctionShouldWork() {
+		assertQuery("select ceiling(1.5) from Element a");
+	}
+
+	@Test
+	void lnFunctionSouldWork() {
+		assertQuery("select ln(7.5) from Element a");
+	}
+
 	@Test // GH-2981
 	void cteWithClauseShouldWork() {