diff --git a/tests/script/general/parser/fill_us.sim b/tests/script/general/parser/fill_us.sim
new file mode 100644
index 0000000000000000000000000000000000000000..190b565b42851e571bfc8e7adbe298dfb8bfa051
--- /dev/null
+++ b/tests/script/general/parser/fill_us.sim
@@ -0,0 +1,1037 @@
+system sh/stop_dnodes.sh
+system sh/ip.sh -i 1 -s up
+system sh/deploy.sh -n dnode1 -m 192.168.0.1 -i 192.168.0.1
+system sh/cfg.sh -n dnode1 -c commitLog -v 0
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+$dbPrefix = m_fl_db
+$tbPrefix = m_fl_tb
+$mtPrefix = m_fl_mt
+$tbNum = 10
+$rowNum = 5
+$totalNum = $tbNum * $rowNum
+$ts0 = 1537146000000000      # 2018-09-17 09:00:00.000000
+$delta = 600000000
+print ========== fill_us.sim
+$i = 0
+$db = $dbPrefix . $i
+$mt = $mtPrefix . $i
+
+sql drop database $db -x step1
+step1:
+sql create database $db precision 'us'
+sql use $db
+sql create table $mt (ts timestamp, c1 int, c2 bigint, c3 float, c4 double, c5 smallint, c6 bool, c7 binary(10), c8 nchar(10)) tags(tgcol int)
+
+$i = 0
+$ts = $ts0
+while $i < $tbNum
+  $tb = $tbPrefix . $i
+  sql create table $tb using $mt tags( $i )
+  
+  $x = 0
+  while $x < $rowNum
+    $xs = $x * $delta
+    $ts = $ts0 + $xs
+    sql insert into $tb values ( $ts , $x , $x , $x , $x , $x , true, 'BINARY', 'NCHAR' ) 
+    $x = $x + 1
+  endw 
+ 
+  $i = $i + 1
+endw 
+
+# setup
+$i = 0
+$tb = $tbPrefix . $i
+$tsu = 4 * $delta
+$tsu = $tsu + $ts0
+
+## fill syntax test
+# number of fill values exceeds number of selected columns
+print select max(c1), max(c2), max(c3), max(c4), max(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6, 6, 6, 6)
+sql select max(c1), max(c2), max(c3), max(c4), max(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6, 6, 6, 6)
+if $data11 != 6 then
+  return -1
+endi
+if $data12 != 6 then
+  return -1
+endi
+if $data13 != 6.00000 then
+  return -1
+endi
+if $data14 != 6.000000000 then
+  return -1
+endi
+
+# number of fill values is smaller than number of selected columns
+print sql select max(c1), max(c2), max(c3) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6)
+sql select max(c1), max(c2), max(c3) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6)
+if $data11 != 6 then
+  return -1
+endi
+if $data12 != 6 then
+  return -1
+endi
+if $data13 != 6.00000 then
+  return -1
+endi
+ 
+# unspecified filling method
+sql_error select max(c1), max(c2), max(c3), max(c4), max(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill (6, 6, 6, 6, 6)
+
+## constant fill test
+# count_with_fill
+print constant_fill test
+print count_with_constant_fill
+print sql select count(c1), count(c2), count(c3), count(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6, 6, 6, 6)
+sql select count(c1), count(c2), count(c3), count(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6, 6, 6, 6)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 1 then
+  return -1
+endi
+if $data11 != 6 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 6 then 
+  return -1
+endi
+if $data41 != 1 then
+  return -1
+endi
+if $data51 != 6 then 
+  return -1
+endi
+if $data61 != 1 then
+  return -1
+endi
+if $data71 != 6 then 
+  return -1
+endi
+if $data81 != 1 then
+  return -1
+endi
+
+# avg_with_fill
+print avg_witt_constant_fill
+sql select avg(c1), avg(c2), avg(c3), avg(c4), avg(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0.000000000 then
+  return -1
+endi
+if $data11 != 6.000000000 then 
+  return -1
+endi
+if $data21 != 1.000000000 then
+  return -1
+endi
+if $data31 != 6.000000000 then 
+  return -1
+endi
+if $data41 != 2.000000000 then
+  return -1
+endi
+if $data51 != 6.000000000 then 
+  return -1
+endi
+if $data61 != 3.000000000 then
+  return -1
+endi
+if $data71 != 6.000000000 then 
+  return -1
+endi
+if $data81 != 4.000000000 then
+  return -1
+endi
+
+# max_with_fill
+print max_with_fill
+sql select max(c1), max(c2), max(c3), max(c4), max(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 6 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 6 then 
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != 6 then 
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != 6 then 
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# min_with_fill
+print min_with_fill
+sql select min(c1), min(c2), min(c3), min(c4), min(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6, 6, 6, 6)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 6 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 6 then 
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != 6 then 
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != 6 then 
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# first_with_fill
+print first_with_fill
+sql select first(c1), first(c2), first(c3), first(c4), first(c5), first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6, 6, 6, 6)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 6 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 6 then 
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != 6 then 
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != 6 then 
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# check double type values
+if $data04 != 0.000000000 then
+  return -1
+endi
+print data14 = $data14
+if $data14 != 6.000000000 then
+  return -1
+endi
+if $data24 != 1.000000000 then
+  return -1
+endi
+if $data34 != 6.000000000 then
+  return -1
+endi
+if $data44 != 2.000000000 then
+  return -1
+endi
+if $data54 != 6.000000000 then
+  return -1
+endi
+if $data64 != 3.000000000 then
+  return -1
+endi
+
+# check float type values
+print $data03 $data13
+if $data03 != 0.00000 then
+  return -1
+endi
+if $data13 != 6.00000 then
+  return -1
+endi
+if $data23 != 1.00000 then
+  return -1
+endi
+if $data33 != 6.00000 then
+  return -1
+endi
+if $data43 != 2.00000 then
+  return -1
+endi
+if $data53 != 6.00000 then
+  return -1
+endi
+if $data63 != 3.00000 then
+  return -1
+endi
+if $data73 != 6.00000 then
+  return -1
+endi
+if $data83 != 4.00000 then
+  return -1
+endi
+
+
+# last_with_fill
+print last_with_fill
+sql select last(c1), last(c2), last(c3), last(c4), last(c5), last(c6), last(c7), last(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 6, 6, 6, 6, 6, 6, 6, 6)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 6 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 6 then 
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != 6 then 
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != 6 then 
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# fill_negative_values
+sql select sum(c1), avg(c2), max(c3), min(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, -1, -1, -1, -1, -1, -1, -1, -1)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != -1 then 
+  return -1
+endi
+
+# fill_char_values_to_arithmetic_fields
+sql_error select sum(c1), avg(c2), max(c3), min(c4), avg(c4), count(c6), last(c7), last(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 'c', 'c', 'c', 'c', 'c', 'c', 'c', 'c')
+
+# fill_multiple_columns
+sql_error select sum(c1), avg(c2), min(c3), max(c4), count(c6), first(c7), last(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 99, 99, 99, 99, 99, abc, abc)
+sql select sum(c1), avg(c2), min(c3), max(c4) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 99, 99, 99, 99)
+if $rows != 9 then
+  return -1
+endi
+print data01 = $data01
+print data11 = $data11
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 99 then
+  return -1
+endi
+
+sql select * from $tb
+#print data08 = $data08
+if $data08 != NCHAR then
+  return -1
+endi
+#return -1
+
+
+# fill_into_nonarithmetic_fieds
+sql select first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 20000000, 20000000, 20000000)
+#if $data11 != 20000000 then
+if $data11 != 1 then
+  return -1
+endi
+
+sql select first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 1, 1, 1)
+sql select first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 1.1, 1.1, 1.1)
+sql select first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 1e1, 1e1, 1e1)
+sql select first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, '1e', '1e1')
+# fill quoted values into bool column will throw error unless the value is 'true' or 'false' Note:2018-10-24
+# fill values into binary or nchar columns will be set to null automatically Note:2018-10-24
+sql_error select first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, '1e', '1e1','1e1')
+sql select first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, true, true, true)
+sql select first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 'true', 'true','true')
+
+
+# fill nonarithmetic values into arithmetic fields
+sql_error select count(*) where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, abc);
+sql_error select count(*) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 'true');
+
+sql select count(*) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, '1e1');
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 1 then
+  return -1
+endi
+if $data11 != 10 then 
+  return -1
+endi
+
+sql select count(*) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, 1e1);
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 1 then
+  return -1
+endi
+if $data11 != 10 then 
+  return -1
+endi
+
+sql select count(*) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, '10');
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 1 then
+  return -1
+endi
+if $data11 != 10 then 
+  return -1
+endi
+
+
+## linear fill
+# feature currently switched off 2018/09/29
+#sql select count(c1), count(c2), count(c3), count(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(linear)
+
+## previous fill
+print fill(prev)
+sql select count(c1), count(c2), count(c3), count(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(prev)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 1 then
+  return -1
+endi
+if $data11 != 1 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 1 then 
+  return -1
+endi
+if $data41 != 1 then
+  return -1
+endi
+if $data51 != 1 then 
+  return -1
+endi
+if $data61 != 1 then
+  return -1
+endi
+if $data71 != 1 then 
+  return -1
+endi
+if $data81 != 1 then
+  return -1
+endi
+
+# avg_with_fill
+sql select avg(c1), avg(c2), avg(c3), avg(c4), avg(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(prev)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0.000000000 then
+  return -1
+endi
+if $data11 != 0.000000000 then 
+  return -1
+endi
+if $data21 != 1.000000000 then
+  return -1
+endi
+if $data31 != 1.000000000 then 
+  return -1
+endi
+if $data41 != 2.000000000 then
+  return -1
+endi
+if $data51 != 2.000000000 then 
+  return -1
+endi
+if $data61 != 3.000000000 then
+  return -1
+endi
+if $data71 != 3.000000000 then 
+  return -1
+endi
+if $data81 != 4.000000000 then
+  return -1
+endi
+
+# max_with_fill
+sql select max(c1), max(c2), max(c3), max(c4), max(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(prev)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 0 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 1 then 
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != 2 then 
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != 3 then 
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# min_with_fill
+sql select min(c1), min(c2), min(c3), min(c4), min(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(prev)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 0 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 1 then 
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != 2 then 
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != 3 then 
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# first_with_fill
+sql select first(c1), first(c2), first(c3), first(c4), first(c5), first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(prev)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 0 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 1 then 
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != 2 then 
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != 3 then 
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# last_with_fill
+sql select last(c1), last(c2), last(c3), last(c4), last(c5), last(c6), last(c7), last(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(prev)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != 0 then 
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != 1 then 
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != 2 then 
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != 3 then 
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+## NULL fill
+print fill(value, NULL)
+# count_with_fill
+sql select count(c1), count(c2), count(c3), count(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill( NULL)
+print select count(c1), count(c2), count(c3), count(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill( NULL)
+sql select count(c1), count(c2), count(c3), count(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, NULL)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 1 then
+  return -1
+endi
+if $data11 != null then
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != null then
+  return -1
+endi
+if $data41 != 1 then
+  return -1
+endi
+if $data51 != null then
+  return -1
+endi
+if $data61 != 1 then
+  return -1
+endi
+if $data71 != null then
+  return -1
+endi
+if $data81 != 1 then
+  return -1
+endi
+sql select count(c1), count(c2), count(c3), count(c4), count(c5), count(c6), count(c7), count(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(none)
+if $rows != 5 then 
+  return -1
+endi
+
+# avg_with_fill
+sql select avg(c1), avg(c2), avg(c3), avg(c4), avg(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, NULL)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0.000000000 then
+  return -1
+endi
+if $data11 != null then
+  return -1
+endi
+if $data21 != 1.000000000 then
+  return -1
+endi
+if $data31 != null then
+  return -1
+endi
+if $data41 != 2.000000000 then
+  return -1
+endi
+if $data51 != null then
+  return -1
+endi
+if $data61 != 3.000000000 then
+  return -1
+endi
+if $data71 != null then
+  return -1
+endi
+if $data81 != 4.000000000 then
+  return -1
+endi
+
+# max_with_fill
+sql select max(c1), max(c2), max(c3), max(c4), max(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, NULL)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != null then
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != null then
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != null then
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != null then
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# min_with_fill
+sql select min(c1), min(c2), min(c3), min(c4), min(c5) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, NULL)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != null then
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != null then
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != null then
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != null then
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# first_with_fill
+sql select first(c1), first(c2), first(c3), first(c4), first(c5), first(c6), first(c7), first(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, NULL)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != null then
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != null then
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != null then
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != null then
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# last_with_fill
+sql select last(c1), last(c2), last(c3), last(c4), last(c5), last(c6), last(c7), last(c8) from $tb where ts >= $ts0 and ts <= $tsu interval(5m) fill(value, NULL)
+if $rows != 9 then 
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data11 != null then
+  return -1
+endi
+if $data21 != 1 then
+  return -1
+endi
+if $data31 != null then
+  return -1
+endi
+if $data41 != 2 then
+  return -1
+endi
+if $data51 != null then
+  return -1
+endi
+if $data61 != 3 then
+  return -1
+endi
+if $data71 != null then
+  return -1
+endi
+if $data81 != 4 then
+  return -1
+endi
+
+# desc fill query
+print desc fill query
+sql select count(*) from m_fl_tb0 where ts>='2018-9-17 9:0:0' and ts<='2018-9-17 9:11:00' interval(1m) fill(value,10) order by ts desc;
+if $rows != 12 then
+  return -1
+endi
+
+
+#print =============== clear
+#sql drop database $db
+#sql show databases
+#if $rows != 0 then 
+#  return -1
+#endi
+
+######################### us ##########################
+$start = 1537146000000000      # 2018-09-17 09:00:00.000000
+$delta = 600000000
+
+sql create table us_st (ts timestamp, c1 int, c2 double) tags(tgcol int)
+sql create table us_t1 using us_st tags( 1 )
+
+sql insert into us_t1 values ('2018-09-17 09:00:00.000001', 1 , 1)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000002', 2 , 2)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000003', 3 , 3)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000004', 4 , 4)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000005', 5 , 5)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000006', 6 , 6)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000007', 7 , 7)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000008', 8 , 8)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000009', 9 , 9)
+
+sql insert into us_t1 values ('2018-09-17 09:00:00.000015', 15 , 15)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000016', 16 , 16)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000017', 17 , 17)
+
+sql insert into us_t1 values ('2018-09-17 09:00:00.000021', 21 , 21)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000022', 22 , 22)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000023', 23 , 23)
+
+sql insert into us_t1 values ('2018-09-17 09:00:00.000027', 27 , 27)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000028', 28 , 28)
+sql insert into us_t1 values ('2018-09-17 09:00:00.000029', 29 , 29)
+
+print sql select avg(c1), avg(c2) from us_t1 where ts >= '2018-09-17 09:00:00.000002' and ts <= '2018-09-17 09:00:00.000021' interval(3u) fill(value, 999, 999)
+sql select avg(c1), avg(c2) from us_t1 where ts >= '2018-09-17 09:00:00.000002' and ts <= '2018-09-17 09:00:00.000021' interval(3u) fill(value, 999, 999)
+if $rows != 8 then 
+  return -1
+endi
+if $data01 != 2.000000000 then
+  return -1
+endi
+if $data11 != 4.000000000 then
+  return -1
+endi
+if $data21 != 7.000000000 then
+  return -1
+endi
+if $data31 != 9.000000000 then
+  return -1
+endi
+if $data41 != 999.000000000 then
+  return -1
+endi
+if $data51 != 16.000000000 then
+  return -1
+endi
+if $data61 != 999.000000000 then
+  return -1
+endi
+if $data71 != 21.000000000 then
+  return -1
+endi
+
+sql select avg(c1), avg(c2) from us_t1 where ts >= '2018-09-17 09:00:00.000002' and ts <= '2018-09-17 09:00:00.000021' interval(3u) fill(none)
+if $rows != 6 then 
+  return -1
+endi
+if $data01 != 2.000000000 then
+  return -1
+endi
+if $data11 != 4.000000000 then
+  return -1
+endi
+if $data21 != 7.000000000 then
+  return -1
+endi
+if $data31 != 9.000000000 then
+  return -1
+endi
+if $data41 != 16.000000000 then
+  return -1
+endi
+if $data51 != 21.000000000 then
+  return -1
+endi
+
+sql select avg(c1), avg(c2) from us_t1 where ts >= '2018-09-17 09:00:00.000002' and ts <= '2018-09-17 09:00:00.000021' interval(3u) fill(null)
+if $rows != 8 then 
+  return -1
+endi
+if $data01 != 2.000000000 then
+  return -1
+endi
+if $data11 != 4.000000000 then
+  return -1
+endi
+if $data21 != 7.000000000 then
+  return -1
+endi
+if $data31 != 9.000000000 then
+  return -1
+endi
+if $data41 != null then
+  print ===== $data41
+  return -1
+endi
+if $data51 != 16.000000000 then
+  return -1
+endi
+if $data61 != null then
+   print ===== $data61
+  return -1
+endi
+if $data71 != 21.000000000 then
+  return -1
+endi
+
+
+
+sql select avg(c1), avg(c2) from us_t1 where ts >= '2018-09-17 09:00:00.000002' and ts <= '2018-09-17 09:00:00.000021' interval(3u) fill(prev)
+if $rows != 8 then 
+  return -1
+endi
+if $data01 != 2.000000000 then
+  return -1
+endi
+if $data11 != 4.000000000 then
+  return -1
+endi
+if $data21 != 7.000000000 then
+  return -1
+endi
+if $data31 != 9.000000000 then
+  return -1
+endi
+if $data41 != 9.000000000 then
+  return -1
+endi
+if $data51 != 16.000000000 then
+  return -1
+endi
+if $data61 != 16.000000000 then
+  return -1
+endi
+if $data71 != 21.000000000 then
+  return -1
+endi
+
+sql select avg(c1), avg(c2) from us_t1 where ts >= '2018-09-17 09:00:00.000002' and ts <= '2018-09-17 09:00:00.000021' interval(3u) fill(linear)
+if $rows != 8 then 
+  return -1
+endi
+if $data01 != 2.000000000 then
+  return -1
+endi
+if $data11 != 4.000000000 then
+  return -1
+endi
+if $data21 != 7.000000000 then
+  return -1
+endi
+if $data31 != 9.000000000 then
+  return -1
+endi
+if $data41 != 12.500000000 then
+  return -1
+endi
+if $data51 != 16.000000000 then
+  return -1
+endi
+if $data61 != 18.500000000 then
+  return -1
+endi
+if $data71 != 21.000000000 then
+  return -1
+endi
+
+print ======== fill_us.sim run end...... ================
\ No newline at end of file
diff --git a/tests/script/general/parser/sliding.sim b/tests/script/general/parser/sliding.sim
new file mode 100644
index 0000000000000000000000000000000000000000..177c95651f27856b6af1c4dfbb55c32bc915902e
--- /dev/null
+++ b/tests/script/general/parser/sliding.sim
@@ -0,0 +1,461 @@
+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/cfg.sh -n dnode1 -c walLevel -v 0
+system sh/cfg.sh -n dnode1 -c debugFlag -v 135
+system sh/cfg.sh -n dnode1 -c rpcDebugFlag -v 135
+system sh/exec.sh -n dnode1 -s start
+sleep 1000
+sql connect
+
+$dbPrefix = sliding_db
+$tbPrefix = sliding_tb
+$mtPrefix = sliding_mt
+$tbNum = 8
+$rowNum = 10000
+$totalNum = $tbNum * $rowNum
+
+print =============== sliding.sim
+$i = 0
+$db = $dbPrefix . $i
+$mt = $mtPrefix . $i
+
+$tstart = 946656000000
+
+$i = 0
+$db = $dbPrefix . $i
+$mt = $mtPrefix . $i
+
+sql drop database if exits $db -x step1
+step1:
+sql create database if not exists $db tables 4 keep 36500
+sql use $db
+sql create table $mt (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int, t2 binary(12))
+
+$i = 0
+while $i < $tbNum
+  $tb = $tbPrefix . $i
+  $tg2 = ' . abc
+  $tg2 = $tg2 . '
+  sql create table $tb using $mt tags( $i , $tg2 )
+
+  $x = 0
+  while $x < $rowNum
+    $ms = $x . m
+    $c = $x / 100
+    $c = $c * 100
+    $c = $x - $c
+
+    $binary = ' . binary
+    $binary = $binary . $c
+    $binary = $binary . '
+
+    $nchar = ' . nchar
+    $nchar = $nchar . $c
+    $nchar = $nchar . '
+
+    sql insert into $tb values ($tstart , $c , $c , $c , $c , $c , $c , $c , $binary , $nchar )
+    $tstart = $tstart + 30
+    $x = $x + 1
+  endw
+
+  $i = $i + 1
+  $tstart = 946656000000
+endw
+
+sleep 100
+
+$i1 = 1
+$i2 = 0
+
+$db = $dbPrefix . $i
+$mt = $mtPrefix . $i
+
+$dbPrefix = sliding_db
+$tbPrefix = sliding_tb
+$mtPrefix = sliding_mt
+
+$tb1 = $tbPrefix . $i1
+$tb2 = $tbPrefix . $i2
+$ts1 = $tb1 . .ts
+$ts2 = $tb2 . .ts
+
+print ===============================interval_sliding query
+sql select count(*) from sliding_tb0 interval(30s) sliding(30s);
+if $row != 10 then
+ return -1
+endi
+
+if $data00 != @00-01-01 00:00:00.000@ then
+ return -1
+endi
+
+if $data01 != 1000 then
+ return -1
+endi
+
+if $data10 != @00-01-01 00:00:30.000@ then
+ return -1
+endi
+
+if $data11 != 1000 then
+ return -1
+endi
+
+sql select stddev(c1) from sliding_tb0 interval(10a) sliding(10a)
+if $row != 10000 then
+  return -1
+endi
+
+if $data00 != @00-01-01 00:00:00.000@ then
+  return -1
+endi
+
+if $data01 != 0.000000000 then
+   return -1
+endi
+
+if $data90 != @00-01-01 00:00:00.270@ then
+  return -1
+endi
+
+if $data91 != 0.000000000 then
+  return -1
+endi
+
+sql select stddev(c1),count(c2),first(c3),last(c4) from sliding_tb0 interval(10a) sliding(10a) order by ts desc;
+if $row != 10000 then
+  return -1
+endi
+
+if $data00 != @00-01-01 00:04:59.970@ then
+ return -1
+endi
+
+if $data01 != 0.000000000 then
+  return -1
+endi
+
+if $data02 != 1 then
+  return -1
+endi
+
+if $data03 != 99 then
+  return -1
+endi
+
+if $data04 != 99 then
+  return -1
+endi
+
+if $data90 != @00-01-01 00:04:59.700@ then
+  return -1
+endi
+
+if $data91 != 0.000000000 then
+  return -1
+endi
+
+if $data92 != 1 then
+  return -1
+endi
+
+if $data93 != 90 then
+  return -1
+endi
+
+if $data94 != 90 then
+  return -1
+endi
+
+sql select count(c2),last(c4) from sliding_tb0 interval(30s) sliding(10s) order by ts asc;
+if $row != 30 then
+  return -1
+endi
+
+if $data00 != @00-01-01 00:00:00.000@ then
+  return -1
+endi
+
+if $data01 != 1000 then
+  return -1
+endi
+
+if $data02 != 99 then
+  return -1
+endi
+
+sql select count(c2),stddev(c3),first(c4),last(c4) from sliding_tb0 where ts>'2000-01-01 0:0:0' and ts<'2000-1-1 0:0:31' interval(30s) sliding(30s) order by ts asc;
+if $row != 2 then
+  return -1
+endi
+
+if $data04 != 99 then
+  return -1
+endi
+
+if $data01 != 999 then
+  return -1
+endi
+
+if $data02 != 28.837977152 then
+  return -1
+endi
+
+#interval offset + limit
+sql select count(c2), first(c3),stddev(c4) from sliding_tb0 interval(10a) sliding(10a) order by ts desc limit 10 offset 990;
+if $row != 10 then
+  return -1
+endi
+
+if $data00 != @00-01-01 00:04:30.270@ then
+  return -1
+endi
+
+if $data01 != 1 then
+  return -1
+endi
+
+if $data02 != 9 then
+  return -1
+endi
+
+if $data03 != 0.000000000 then
+  return -1
+endi
+
+if $data90 != @00-01-01 00:04:30.000@ then
+  return -1
+endi
+
+if $data91 != 1 then
+  return -1
+endi
+
+if $data92 != 0 then
+  return -1
+endi
+
+if $data93 != 0.000000000 then
+  return -1
+endi
+
+#interval offset test
+sql select count(c2),last(c4),stddev(c3) from sliding_tb0 interval(30s) sliding(30s) order by ts asc limit 1000 offset 1;
+if $row != 9 then
+  return -1
+endi
+
+if $data00 != @00-01-01 00:00:30.000@ then
+  return -1
+endi
+
+if $data01 != 1000 then
+  return -1
+endi
+
+if $data02 != 99 then
+  return -1
+endi
+
+if $data80 != @00-01-01 00:04:30.000@ then
+  return -1
+endi
+
+if $data81 != 1000 then
+  return -1
+endi
+
+sql select count(c2),last(c4),stddev(c3) from sliding_tb0 where ts>'2000-1-1 0:0:0' and ts<'2000-1-1 0:0:31' interval(30s) sliding(30s) order by ts asc limit 1000 offset 0;
+if $row != 2 then
+ return -1
+endi
+
+if $data00 != @00-01-01 00:00:00.000@ then
+ return -1
+endi
+
+if $data01 != 999 then
+ return -1
+endi
+
+if $data02 != 99 then
+ return -1
+endi
+
+if $data03 != 28.837977152 then
+ return -1
+endi
+
+if $data10 != @00-01-01 00:00:30.000@ then
+ return -1
+endi
+
+if $data11 != 34 then
+ return -1
+endi
+
+if $data12 != 33 then
+ return -1
+endi
+
+if $data13 != 9.810708435 then
+ return -1
+endi
+
+sql select count(c2),last(c4),stddev(c3) from sliding_tb0 interval(30s) sliding(20s) order by ts asc limit 100 offset 1;
+if $row != 14 then
+ return -1
+endi
+
+if $data00 != @00-01-01 00:00:20.000@ then
+ return -1
+endi
+
+if $data01 != 1000 then
+ return -1
+endi
+
+if $data02 != 66 then
+ return -1
+endi
+
+if $data03 != 28.866070048 then
+ return -1
+endi
+
+if $data90 != @00-01-01 00:03:20.000@ then
+ return -1
+endi
+
+if $data91 != 1000 then
+ return -1
+endi
+
+if $data92 != 66 then
+ return -1
+endi
+
+sql select count(c2),last(c4),stddev(c3) from sliding_tb0 interval(30s) sliding(20s) order by ts asc limit 100 offset 14;
+if $row != 1 then
+ return -1
+endi
+
+sql select count(c2),last(c4),stddev(c3),spread(c3) from sliding_tb0 where c2 = 0 interval(30s) order by ts desc;
+if $row != 10 then
+ return -1
+endi
+
+#00-01-01 00:04:30.000|                   10|       0|              0.000000000|              0.000000000|
+if $data00 != @00-01-01 00:04:30.000@ then
+ return -1
+endi
+
+if $data01 != 10 then
+ return -1
+endi
+
+if $data02 != 0 then
+ return -1
+endi
+
+if $data03 != 0.000000000 then
+ return -1
+endi
+
+sql select count(c2),last(c4),stddev(c3),spread(c3) from sliding_tb0 where c2 = 0 interval(30s) sliding(20s) order by ts desc limit 1 offset 15;
+if $row != 0 then
+ return -1
+endi
+
+sql select count(*),stddev(c1),count(c1),first(c2),last(c3) from sliding_tb0 where ts>'2000-1-1 00:00:00' and ts<'2000-1-1 00:00:01.002' and c2 >= 0 interval(30s) sliding(10a) order by ts asc limit 1000;
+if $row != 100 then
+ return -1
+endi
+
+if $data00 != @00-01-01 00:00:00.000@ then
+ return -1
+endi
+
+if $data02 != 9.521904571 then
+ return -1
+endi
+
+if $data05 != 33 then
+ return -1
+endi
+
+if $data10 != @00-01-01 00:00:00.010@ then
+ return -1
+endi
+
+if $data12 != 9.521904571 then
+ return -1
+endi
+
+if $data15 != 33 then
+ return -1
+endi
+
+if $data95 != 33 then
+ return -1
+endi
+
+sql select count(*),stddev(c1),count(c1),first(c2),last(c3) from sliding_tb0 where ts>'2000-1-1 00:00:00' and ts<'2000-1-1 00:00:01.002' and c2 >= 0 interval(30s) sliding(10a) order by ts desc limit 1000;
+if $row != 100 then
+ return -1
+endi
+
+if $data00 != @00-01-01 00:00:00.990@ then
+ return -1
+endi
+
+if $data01 != 1 then
+ return -1
+endi
+
+if $data02 != 0.000000000 then
+ return -1
+endi
+
+if $data03 != 1 then
+ return -1
+endi
+
+if $data90 != @00-01-01 00:00:00.900@ then
+ return -1
+endi
+
+if $data91 != 4 then
+ return -1
+endi
+
+if $data92 != 1.118033989 then
+ return -1
+endi
+
+if $data93 != 4 then
+ return -1
+endi
+
+if $data94 != 30.00000 then
+ return -1
+endi
+
+print check boundary check crash at client side
+sql select count(*) from sliding_mt0 where ts>now and ts < now-1h;
+
+print ========================query on super table
+
+print ========================error case
+sql_error select sum(c1) from sliding_tb0 interval(1a) sliding(1a);
+sql_error select sum(c1) from sliding_tb0 interval(10a) sliding(12a);
+sql_error select sum(c1) from sliding_tb0 sliding(1n) interval(1y);
+sql_error select sum(c1) from sliding_tb0 interval(-1y)  sliding(1n);
+sql_error select sum(c1) from sliding_tb0 interval(1y)  sliding(-1n);
+sql_error select sum(c1) from sliding_tb0 interval(0)  sliding(0);
+sql_error select sum(c1) from sliding_tb0 interval(0m)  sliding(0m);
+sql_error select sum(c1) from sliding_tb0 interval(m)  sliding(m);
+sql_error select sum(c1) from sliding_tb0 sliding(4m);
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
diff --git a/tests/script/general/parser/union.sim b/tests/script/general/parser/union.sim
new file mode 100644
index 0000000000000000000000000000000000000000..14b6c97b7c8bb8a3497cb68ca426d6560320d8dc
--- /dev/null
+++ b/tests/script/general/parser/union.sim
@@ -0,0 +1,411 @@
+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/cfg.sh -n dnode1 -c walLevel -v 0
+system sh/cfg.sh -n dnode1 -c debugFlag -v 135
+system sh/cfg.sh -n dnode1 -c rpcDebugFlag -v 135
+system sh/exec.sh -n dnode1 -s start
+sleep 1000
+sql connect
+
+$dbPrefix = union_db
+$tbPrefix = union_tb
+$tbPrefix1 = union_tb_
+$mtPrefix = union_mt
+$tbNum = 10
+$rowNum = 10000
+$totalNum = $tbNum * $rowNum
+
+print =============== union.sim
+$i = 0
+$db = $dbPrefix . $i
+$mt = $mtPrefix . $i
+
+$j = 1
+
+$mt1 = $mtPrefix . $j
+
+sql drop database if exits $db -x step1
+step1:
+sql create database if not exists $db maxtables 4
+sql use $db
+sql create table $mt (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int)
+
+$i = 0
+$t = 1578203484000
+
+while $i < $tbNum
+  $tb = $tbPrefix . $i
+  sql create table $tb using $mt tags( $i )
+
+  $x = 0
+  while $x < $rowNum
+    $ms = $x * 1000
+    $ms = $ms * 60
+
+    $c = $x / 100
+    $c = $c * 100
+    $c = $x - $c
+    $binary = 'binary . $c
+    $binary = $binary . '
+    $nchar = 'nchar . $c
+    $nchar = $nchar . '
+
+    $t1 = $t + $ms
+    sql insert into $tb values ($t1 , $c , $c , $c , $c , $c , $c , $c , $binary , $nchar )
+    $x = $x + 1
+  endw
+
+  $i = $i + 1
+endw
+
+sql create table $mt1 (ts timestamp, c1 int, c2 float, c3 bigint, c4 smallint, c5 tinyint, c6 double, c7 bool, c8 binary(10), c9 nchar(9)) TAGS(t1 int)
+
+$j = 0
+$t = 1578203484000
+$rowNum = 1000
+$tbNum = 5
+$i = 0
+
+while $i < $tbNum
+  $tb1 = $tbPrefix1 . $j
+  sql create table $tb1 using $mt1 tags( $i )
+
+  $x = 0
+  while $x < $rowNum
+    $ms = $x * 1000
+    $ms = $ms * 60
+
+    $c = $x / 100
+    $c = $c * 100
+    $c = $x - $c
+    $binary = 'binary . $c
+    $binary = $binary . '
+    $nchar = 'nchar . $c
+    $nchar = $nchar . '
+
+    $t1 = $t + $ms
+    sql insert into $tb1 values ($t1 , $c , $c , $c , $c , $c , $c , $c , $binary , $nchar )
+    $x = $x + 1
+  endw
+
+  $i = $i + 1
+  $j = $j + 1
+endw
+
+print sleep 1sec.
+sleep 1000
+
+$i = 1
+$tb = $tbPrefix . $i
+
+## column type not identical
+sql_error select count(*) as a from union_mt0 union all select avg(c1) as a from union_mt0
+sql_error select count(*) as a from union_mt0 union all select spread(c1) as a from union_mt0;
+
+## union not supported
+sql_error (select count(*) from union_mt0) union (select count(*) from union_mt0);
+
+## column type not identical
+sql_error select c1 from union_mt0 limit 10 union all select c2 from union_tb1 limit 20;
+
+## union not support recursively union
+sql_error select c1 from union_tb0 limit 2 union all (select c1 from union_tb1 limit 1 union all select c1 from union_tb3 limit 2);
+sql_error (select c1 from union_tb0 limit 1 union all select c1 from union_tb1 limit 1) union all (select c1 from union_tb0 limit 10 union all select c1 from union_tb1 limit 10);
+
+# union as subclause
+sql_error (select c1 from union_tb0 limit 1 union all select c1 from union_tb1 limit 1) limit 1
+
+# sql with parenthese
+sql (((select c1 from union_tb0)))
+if $rows != 10000 then
+  return -1
+endi
+
+if $data00 != 0 then
+  return -1
+endi
+
+if $data10 != 1 then
+  return -1
+endi
+
+# mixed order
+sql select ts, c1 from union_tb1 order by ts asc limit 10 union all select ts, c1 from union_tb0 order by ts desc limit 2 union all select ts, c1 from union_tb2 order by ts asc limit 10
+if $rows != 22 then
+  return -1
+endi
+
+if $data00 != @20-01-05 13:51:24.000@ then
+  return -1
+endi
+
+if $data01 != 0 then
+  return -1
+endi
+
+if $data10 != @20-01-05 13:52:24.000@ then
+  return -1
+endi
+
+if $data11 != 1 then
+  return -1
+endi
+
+if $data90 != @20-01-05 14:00:24.000@ then
+  return -1
+endi
+
+if $data91 != 9 then
+  return -1
+endi
+
+# different sort order
+
+# super table & normal table mixed up
+sql select c3 from union_tb0 limit 2 union all select sum(c1) as c3 from union_mt0;
+if $rows != 3 then
+  return -1
+endi
+
+if $data00 != 0 then
+  return -1
+endi
+
+if $data10 != 1 then
+  return -1
+endi
+
+if $data20 != 4950000 then
+  return -1
+endi
+
+# type compatible
+sql select c3 from union_tb0 limit 2 union all select sum(c1) as c3 from union_tb1;
+if $rows != 3 then
+ return -1
+endi
+
+if $data00 != 0 then
+   return -1
+endi
+
+if $data10 != 1 then
+  return -1
+endi
+
+if $data20 != 495000 then
+  return -1
+endi
+
+# two join subclause
+sql select count(*) as c from union_tb0, union_tb1 where union_tb0.ts=union_tb1.ts union all select union_tb0.c3 as c from union_tb0, union_tb1 where union_tb0.ts=union_tb1.ts limit 10
+if $rows != 11 then
+  return -1
+endi
+
+if $data00 != 10000 then
+  return -1
+endi
+
+if $data10 != 0 then
+  return -1
+endi
+
+if $data20 != 1 then
+  return -1
+endi
+
+if $data90 != 8 then
+ return -1
+endi
+
+print ===========================================tags union
+# two super table tag union, limit is not active during retrieve tags query
+sql select t1 from union_mt0 union all select t1 from union_mt0 limit 1
+if $rows != 20 then
+  return -1
+endi
+
+if $data00 != 0 then
+  return -1
+endi
+
+if $data90 != 9 then
+  return -1
+endi
+
+#========================================== two super table join subclause
+print ================two super table join subclause
+sql select avg(union_mt0.c1) as c from union_mt0 interval(1h) limit 10 union all select union_mt1.ts, union_mt1.c1/1.0 as c from union_mt0, union_mt1 where union_mt1.ts=union_mt0.ts and union_mt1.t1=union_mt0.t1 limit 5;
+print the rows value is: $rows
+
+if $rows != 15 then
+  return -1
+endi
+
+# first subclause are empty
+sql select count(*) as c from union_tb0 where ts>now+10y union all select sum(c1) as c from union_tb1;
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != 495000 then
+  return -1
+endi
+
+# all subclause are empty
+sql select c1 from union_tb0 limit 0 union all select c1 from union_tb1 where ts>'2021-1-1 0:0:0'
+if $rows != 0 then
+  return -1
+endi
+
+# middle subclause empty
+sql select c1 from union_tb0 limit 1 union all select c1 from union_tb1 where ts>'2030-1-1 0:0:0' union all select last(c1) as c1 from union_tb1;
+if $rows != 2 then
+  return -1
+endi
+
+if $data00 != 0 then
+  return -1
+endi
+
+if $data10 != 99 then
+  return -1
+endi
+
+# multi-vnode projection query
+sql (select c1 from union_mt0) union all select c1 from union_mt0;
+if $rows != 200000 then
+ return -1
+endi
+
+# multi-vnode projection query + limit
+sql (select ts, c1 from union_mt0 limit 1) union all (select ts, c1 from union_mt0 limit 1);
+if $rows != 2 then
+  return -1
+endi
+
+if $data00 != @20-01-05 13:51:24.000@ then
+  return -1
+endi
+
+if $data01 != 0 then
+  return -1
+endi
+
+if $data10 != @20-01-05 13:51:24.000@ then
+  return -1
+endi
+
+if $data11 != 0 then
+  return -1
+endi
+
+# two aggregated functions for super tables
+sql select sum(c1) as a from union_mt0 interval(1s) limit 9 union all select ts, max(c3) as a from union_mt0 limit 2;
+if $rows != 10 then
+  return -1
+endi
+
+if $data00 != @20-01-05 13:51:24.000@ then
+  return -1
+endi
+
+if $data01 != 0 then
+  return -1
+endi
+
+if $data10 != @20-01-05 13:52:24.000@ then
+  return -1
+endi
+
+if $data11 != 10 then
+  return -1
+endi
+
+if $data20 != @20-01-05 13:53:24.000@ then
+  return -1
+endi
+
+if $data21 != 20 then
+  return -1
+endi
+
+if $data90 != @20-01-05 15:30:24.000@ then
+  return -1
+endi
+
+if $data91 != 99 then
+  return -1
+endi
+
+#1111111111111111111111111111111111111111111111111
+# two aggregated functions for normal tables
+sql select sum(c1) as a from union_tb0 limit 1 union all select sum(c3) as a from union_tb1 limit 2;
+if $rows != 2 then
+  return -1
+endi
+
+if $data00 != 495000 then
+  return -1
+endi
+
+if $data10 != 495000 then
+  return -1
+endi
+
+# two super table query + interval + limit
+sql select ts, first(c3) as a from union_mt0 limit 1 union all select sum(c3) as a from union_mt0 interval(1h) limit 1;
+if $rows != 2 then
+  return -1
+endi
+
+if $data00 != @20-01-05 13:51:24.000@ then
+ return -1
+endi
+
+if $data01 != 0 then
+  return -1
+endi
+
+if $data10 != @20-01-05 13:00:00.000@ then
+ return -1
+endi
+
+if $data11 != 360 then
+  return -1
+endi
+
+sql select server_status() union all select server_status()
+if $rows != 2 then
+  return -1
+endi
+
+if $data00 != 1 then
+  return -1
+endi
+
+if $data10 != 1 then
+  return -1
+endi
+
+sql select client_version() union all select server_version()
+if $rows != 2 then
+  return -1
+endi
+
+sql select database() union all select database()
+if $rows != 2 then
+  return -1
+endi
+
+if $data00 != @union_db0@ then
+  return -1
+endi
+
+if $data10 != @union_db0@ then
+  return -1
+endi
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file