Group by with a quoted select column name alias didn't work. Example: select 1…

Group by with a quoted select column name alias didn't work. Example: select 1 "a" from dual group by "a" 

h2/src/main/org/h2/command/dml/Select.java

@@ -783,6 +783,11 @@ public class Select extends Query {
                             found = j;
                             break;
                         }
+                        sql = expr.getAlias();
+                        if (db.equalsIdentifiers(sql, e.getAlias())) {
+                            found = j;
+                            break;
+                        }
                     }
                 }
                 if (found < 0) {

h2/src/main/org/h2/expression/ExpressionColumn.java

@@ -249,7 +249,7 @@ public class ExpressionColumn extends Expression {
 
     @Override
     public String getAlias() {
-        return column == null ? null : column.getName();
+        return column == null ? columnName : column.getName();
     }
 
     @Override

h2/src/test/org/h2/test/testScript.sql

@@ -3,6 +3,11 @@
 -- Initial Developer: H2 Group
 --
 --- special grammar and test cases ---------------------------------------------------------------------------------------------
+select 1 "a", count(*) from dual group by "a" order by "a";
+> a COUNT(*)
+> - --------
+> 1 1
+> rows (ordered): 1
 
 create table results(eventId int, points int, studentId int);
 > ok
@@ -6413,8 +6418,8 @@ EXPLAIN SELECT * FROM TEST WHERE (ID>=1 AND ID<=2)  OR (ID>0 AND ID<3) AND (ID<>
 
 EXPLAIN SELECT * FROM TEST WHERE ID=1 GROUP BY NAME, ID;
 > PLAN
-> ------------------------------------------------------------------------------------------------------------
-> SELECT TEST.ID, TEST.NAME FROM PUBLIC.TEST /* PUBLIC.PRIMARY_KEY_2: ID = 1 */ WHERE ID = 1 GROUP BY NAME, ID
+> ----------------------------------------------------------------------------------------------------------------------
+> SELECT TEST.ID, TEST.NAME FROM PUBLIC.TEST /* PUBLIC.PRIMARY_KEY_2: ID = 1 */ WHERE ID = 1 GROUP BY TEST.NAME, TEST.ID
 > rows: 1
 
 EXPLAIN PLAN FOR UPDATE TEST SET NAME='Hello', ID=1 WHERE NAME LIKE 'T%' ESCAPE 'x';
@@ -10125,3 +10130,4 @@ create table test(id int, name varchar);
 
 insert into test values(5, 'b'), (5, 'b'), (20, 'a');
 > update count: 3
+