target="in_same_var"
>$target.sql
i=1
while [ $i -le 128 ]; do
	echo 'explain (summary) select a.reltype from pg_class_1 a where a.reltype in (select b.reltype from pg_class_1 b);' >> $target.sql 
	i=$((i + 1))
done

cat $target.sql|psql xman0 >$target.out 2>&1