add case for compute null value

tests/system-test/2-query/function_null.py

@@ -92,6 +92,7 @@ class TDTestCase:
 
             scalar_sql_1 = f"select {function_name}(c1)/0 from t1 group by c1 order by c1"
             scalar_sql_2 = f"select {function_name}(c1/0) from t1 group by c1 order by c1"
+            scalar_sql_3 = f"select {function_name}(NULL) from t1 group by c1 order by c1"
             tdSql.query(scalar_sql_1)
             tdSql.checkRows(10)
             tdSql.checkData(0,0,None)
@@ -100,6 +101,10 @@ class TDTestCase:
             tdSql.checkRows(10)
             tdSql.checkData(0,0,None)
             tdSql.checkData(9,0,None)
+            tdSql.query(scalar_sql_3)
+            tdSql.checkRows(10)
+            tdSql.checkData(0,0,None)
+            tdSql.checkData(9,0,None)
 
         function_names = ["sin" ,"cos" ,"tan" ,"asin" ,"acos" ,"atan"]
 
@@ -109,6 +114,9 @@ class TDTestCase:
         tdSql.query(" select sin(c1/0) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
+        tdSql.query(" select sin(NULL) from t1 group by c1 order by c1")
+        tdSql.checkData(9,0,None)
+
         tdSql.query(" select sin(0.00) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,0.000000000)
 
@@ -122,6 +130,9 @@ class TDTestCase:
         tdSql.query(" select cos(c1/0) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
+        tdSql.query(" select cos(NULL) from t1 group by c1 order by c1")
+        tdSql.checkData(9,0,None)
+
         tdSql.query(" select cos(0.00) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,1.000000000)
 
@@ -135,6 +146,9 @@ class TDTestCase:
         tdSql.query(" select tan(c1/0) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
+        tdSql.query(" select tan(NULL) from t1 group by c1 order by c1")
+        tdSql.checkData(9,0,None)
+
         tdSql.query(" select tan(0.00) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,0.000000000)
 
@@ -147,6 +161,9 @@ class TDTestCase:
         tdSql.query(" select atan(c1/0) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
+        tdSql.query(" select atan(NULL) from t1 group by c1 order by c1")
+        tdSql.checkData(9,0,None)
+
         tdSql.query(" select atan(0.00) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,0.000000000)
 
@@ -160,6 +177,9 @@ class TDTestCase:
         tdSql.query(" select asin(c1/0) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
+        tdSql.query(" select asin(NULL) from t1 group by c1 order by c1")
+        tdSql.checkData(9,0,None)
+
         tdSql.query(" select asin(0.00) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,0.000000000)
 
@@ -173,6 +193,9 @@ class TDTestCase:
         tdSql.query(" select acos(c1/0) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
+        tdSql.query(" select acos(NULL) from t1 group by c1 order by c1")
+        tdSql.checkData(9,0,None)
+
         tdSql.query(" select acos(0.00) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,1.570796327)
 
@@ -188,6 +211,9 @@ class TDTestCase:
         tdSql.query(" select log(-10) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
+        tdSql.query(" select log(NULL ,2) from t1 group by c1 order by c1")
+        tdSql.checkData(9,0,None)
+
         tdSql.query(" select log(c1)/0 from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
@@ -201,6 +227,9 @@ class TDTestCase:
         tdSql.query(" select pow(c1,2)/0 from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)
 
+        tdSql.query(" select pow(NULL,2) from t1 group by c1 order by c1")
+        tdSql.checkData(9,0,None)
+
         tdSql.query(f" select pow(c1/0 ,1 ) from t1 group by c1 order by c1")
         tdSql.checkData(9,0,None)