tables=100
dbname=postgres


for cols in 2 4 8 16 31 32 64 128 256 512 1024 
do
	psql -c "drop table parent cascade;" $dbname &> /dev/null
	sql="create table parent ("
	for i in $(seq 1 $cols)
	do
		sql="${sql}col$i int check (col$i > 0)"
		if [ $i -lt $cols ]; then
			sql="${sql},"
		fi
	done
	sql="${sql});"

	psql -c "$sql" $dbname &> /dev/null

	for i in $(seq 1 $tables)
	do
		psql -c "create table child$i () inherits (parent);" $dbname > /dev/null
	done

	echo -n "pg_dump for $cols columns "
	{ time pg_dump $dbname > /dev/null; } |& grep real
	
done