fix the distinct case

tests/pytest/functions/queryTestCases.py

@@ -739,10 +739,8 @@ class TDTestCase:
         tdSql.checkRows(tbnum*3)
         tdSql.query(f"select distinct  c1 c2, c2 c3 from t1 where c1 <{tbnum}")
         tdSql.checkRows(3)
-        tdSql.query("select distinct  c1, c2 from stb1 order by ts")
-        tdSql.checkRows(tbnum*3+1)
-        tdSql.query("select distinct  c1, c2 from t1 order by ts")
-        tdSql.checkRows(4)
+        tdSql.error("select distinct  c1, c2 from stb1 order by ts")
+        tdSql.error("select distinct  c1, c2 from t1 order by ts")
         tdSql.error("select distinct  c1, ts from stb1 group by c2")
         tdSql.error("select distinct  c1, ts from t1 group by c2")
         tdSql.error("select distinct  c1, max(c2) from stb1 ")