sql connect
sleep 3000

$i = 0
$dbPrefix = tb_in_db
$tbPrefix = tb_in_tb
$db = $dbPrefix . $i
$tb = $tbPrefix . $i

print =============== step1
sql drop database -x step1
step1:
sql create database $db
sql use $db
sql create table $tb (ts timestamp, speed int)

$x = 0
while $x < 10
  $ms = $x . m 
  sql insert into $tb values (now + $ms , $x ) 
  $x = $x + 1
endw 

print =============== step 2
sql insert into $tb values (now - 5m , 10) -x error_insert
sql insert into $tb values (now - 6m , 10) -x error_insert
sql insert into $tb values (now - 7m , 10) -x error_insert
sql insert into $tb values (now - 8m , 10) -x error_insert
error_insert:

sql select * from $tb

print $rows points data are retrieved
if $rows != 10 then 
  return -1
endi

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