[td-225] update the test script

tests/script/general/parser/limit1.sim

@@ -65,7 +65,7 @@ sleep 2000
 system sh/exec.sh -n dnode1 -s start
 print ================== server restart completed
 
-run general/parser/limit1_tb.sim
+#run general/parser/limit1_tb.sim
 run general/parser/limit1_stb.sim
 
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file

tests/script/general/parser/limit1_tb.sim

@@ -111,16 +111,16 @@ endi
 if $data09 != nchar0 then
   return -1
 endi
-if $data11 != NULL then
+if $data11 != null then
   return -1
 endi
-if $data12 != NULL then
+if $data12 != null then
   return -1
 endi
-if $data13 != NULL then
+if $data13 != null then
   return -1
 endi
-if $data14 != NULL then
+if $data14 != null then
   return -1
 endi
 
@@ -543,7 +543,7 @@ endi
 if $data14 != 8.000000000 then
   return -1
 endi
-if $data21 != NULL then
+if $data21 != null then
   return -1
 endi
 
@@ -613,7 +613,7 @@ endi
 if $data21 != 7.000000000 then
   return -1
 endi
-if $data31 != NULL then
+if $data31 != null then
   return -1
 endi
 sql select avg(c1), avg(c2), avg(c3), avg(c4), avg(c5), avg(c6) from $tb where ts >= $ts0 and ts <= $tsu interval(30m) limit 3 offset 1