[td-1752] add test cases.

tests/script/general/parser/col_arithmetic_operation.sim

@@ -91,4 +91,22 @@ endi
 sql_error select max(c2*2) from $tb
 sql_error select max(c1-c2) from $tb
 
+print =====================> td-1764
+sql select sum(c1)/count(*), sum(c1) as b, count(*) as b from $stb interval(1y)
+if $rows != 1 then
+  return -1
+endi
+
+if $data00 != @18-01-01 00:00:00.000@ then
+  return -1
+endi
+
+if $data01 != 2.250000000 then
+  return -1
+endi
+
+if $data02 != 225000 then
+  return -1
+endi
+
 system sh/exec.sh -n dnode1 -s stop -x SIGINT
\ No newline at end of file

tests/script/general/parser/union.sim

@@ -251,7 +251,7 @@ if $rows != 15 then
 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;
+sql select count(*) as c from union_tb0 where ts > now + 3650d union all select sum(c1) as c from union_tb1;
 if $rows != 1 then
   return -1
 endi
@@ -346,7 +346,7 @@ 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