Some nested joins could not be executed, for example: select * from (select *…

Some nested joins could not be executed, for example: select * from (select * from (select * from a) a right join b b) c;

h2/src/main/org/h2/table/TableFilter.java

@@ -634,9 +634,15 @@ public class TableFilter implements ColumnResolver {
                 buffNested.append('\n');
                 n = n.getJoin();
             } while (n != null);
-            buff.append("(\n");
-            buff.append(StringUtils.indent(buffNested.toString(), 4, false));
-            buff.append(')');
+            String nested = buffNested.toString();
+            boolean enclose = !nested.startsWith("(");
+            if (enclose) {
+                buff.append("(\n");
+            }
+            buff.append(StringUtils.indent(nested, 4, false));
+            if (enclose) {
+                buff.append(')');
+            }
             if (isJoin) {
                 buff.append(" ON ");
                 if (joinCondition == null) {

h2/src/test/org/h2/test/testSimple.in.txt

+select 1 from(select 2 from(select 1) a right join dual b) c;
+> 1;
 select 1.00 / 3 * 0.00;
 > 0.00000000000000000000000000000;
 select 1.00000 / 3 * 0.0000;