Description of problem:
The migration process from Sat5.7 embPG -> Sat5.7 extOracle 10g fails with error
"ERROR at line 1:
ORA-00923: FROM keyword not found where expected"
tlestach + tkasparek have investigated it and the problem is SQL command "WITHIN GROUP", what can use from the version 11g or higher.

Version-Release number of selected component (if applicable):
Satellite-5.7.0-RHEL6-re20141212.0

How reproducible:
100%

Steps to Reproduce:
1. We have got a Satellite 5.7 with embPG DB + a machine with Oracle 10g DB
2. Follow these steps:
> yum upgrade -y
> /usr/bin/spacewalk-schema-upgrade
> yum install spacewalk-utils
> yum remove rhn-upgrade -y  # bz1171675
> rhn-satellite stop
> service postgresql92-postgresql start
# make a dump
> spacewalk-dump-schema --to=oracle  > /tmp/spacewalk-postgresql.dump
# disable postgresql
> service postgresql92-postgresql stop
> chkconfig postgresql92-postgresql off
> yum remove spacewalk-postgresql
> yum install spacewalk-oracle # You should be sure, the dependencies are installed from the correct channel.
# Configure DB
> setenforce 0 # problem with selinux
> spacewalk-setup --db-only --external-oracle
> NLS_LANG=AMERICAN_AMERICA.UTF8 sqlplus spaceuser/XXX@//external-oracle-db.redhat.com/xrhnsatx.world < /tmp/spacewalk-postgresql.dump
...
SQL> SQL>   2    3    4    5    6    7    8    9   10   11   12   13  SELECT mi.index_name, mi.table_name, mi.tablespace_name, LISTAGG ( mic.column_name, ', ' )
         *
ERROR at line 3:
ORA-06550: line 3, column 10:
PL/SQL: ORA-00923: FROM keyword not found where expected
ORA-06550: line 2, column 14:
PL/SQL: SQL Statement ignored


Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
...

Actual results:
SQL error

Expected results:
No SQL error

Additional info:
This is problematic SQL command from dump:
SELECT mi.index_name, mi.table_name, mi.tablespace_name, LISTAGG ( mic.column_name, ', ' ) WITHIN GROUP ( ORDER BY mic.column_name ) index_columns FROM tmp_migration_indexes mi, tmp_migration_index_columns mic WHERE mi.index_name = mic.index_name GROUP BY mi.index_name, mi.table_name, mi.tablespace_name;