aligputf8=# insert into test_group 
aligputf8-# select generate_series(1,100000),
aligputf8-#        (random()*200)::int,
aligputf8-#        (random()*800)::int,
aligputf8-#        (random()*1600)::int,
aligputf8-#        (random()*3200)::int,
aligputf8-#        (random()*6400)::int,
aligputf8-#        (random()*12800)::int,
aligputf8-#        (random()*40000)::int,
aligputf8-#        (random()*100000)::int,
aligputf8-#        (random()*1000000)::int,
aligputf8-#        'hello',
aligputf8-#        'welcome',
aligputf8-#        'haha',
aligputf8-#        'chen';
INSERT 0 100000