sql connect
sleep 3000

$i = 0
$dbPrefix = tb_mf_db
$tbPrefix = tb_mf_tb
$db = $dbPrefix . $i
$tb = $tbPrefix . $i

print =============== step1
sql drop database -x step1
step1:
sql create database $db
sql use $db

$x = 0
create1: 
	$x = $x + 1
	sleep 1000
	if $x == 20 then 
	  return -1
	endi
sql create table $tb (ts timestamp, speed int) -x create1

$N = 20000

$x = 0

while $x < $N
  $ms = $x . s 
  #print insert into $tb values (now + $ms , $x )
  sql insert into $tb values (now + $ms , $x ) -x error_insert
  $x = $x + 1
endw 
error_insert:

sql select * from $tb
print $rows points data are retrieved -> exepct $N rows
if $rows < $N then
  return -1
endi

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