feat: add test case to udf.sim

tests/script/tsim/query/udf.sim

@@ -94,6 +94,31 @@ endi
 if $data00 != 2.645751311 then
   return -1
 endi
+
+sql insert into t2 values(now+4s, 4, 8)(now+5s, 5, 9);
+sql select udf2(f1-f2), udf2(f1+f2) from t2;
+print $rows , $data00 , $data01
+if $rows != 1 then
+  return -1;
+endi
+if $data00 != 5.656854249 then
+  return -1
+endi
+if $data01 != 18.547236991 then
+  return -1
+endi
+
+sql select udf2(udf1(f2-f1)), udf2(udf1(f2/f1)) from t2;
+if $rows != 1 then
+  return -1
+endi
+if $data00 != 176.000000000 then
+  return -1
+endi
+if $data01 != 152.420471066 then
+  return -1
+endi
+print $rows , $data00 , $data01
 sql drop function udf1;
 sql show functions;
 if $rows != 1 then