#!/usr/bin/python

import itertools
import psycopg2

columns = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];

orderings = itertools.permutations(columns)

conn = psycopg2.connect('host=localhost user=postgres dbname=test')
cur = conn.cursor()

cur.execute('set enable_incrementalsort = off')

for o in orderings:

	if len(o) < 4:
		continue

	for r in range(1,10):

		cur.execute('EXPLAIN SELECT * FROM t ORDER BY ' + (','.join(o)))