sql connect
sleep 3000

$i = 0
$dbPrefix = lm_bn_db
$tbPrefix = lm_bn_tb
$db = $dbPrefix . $i
$tb = $tbPrefix . $i

print =============== step1
sql create database $db
sql use $db
sql create table $tb (ts timestamp, speed binary(5)) 

sql insert into $tb values (now, ) -x step1
	return -1
step1:

print =============== step2
sql insert into $tb values (now+1a, '1234')
sql select speed from $tb order by ts desc
if $rows != 1 then 
  return -1
endi
if $data00 != 1234 then 
  return -1
endi

print =============== step3
sql insert into $tb values (now+2a, '23456')
sql select speed from $tb order by ts desc
if $rows != 2 then 
  return -1
endi
print ==> $data00
if $data00 != 23456 then 
  return -1
endi

print =============== step4
sql insert into $tb values (now+3a, '345678')
sql select speed from $tb order by ts desc
if $rows != 3 then 
  return -1
endi
print ==> $data00
if $data00 != 34567 then 
  return -1
endi

sql drop database $db
sql show databases
if $rows != 0 then 
  return -1
endi