Merge pull request #4862 from taosdata/test/testcase

[TD-2627]<test> add case for apercentile

tests/pytest/functions/function_percentile.py

@@ -144,8 +144,10 @@ class TDTestCase:
         print("apercentile result: %s" % tdSql.getData(0, 0))
 
         # Test case for: https://jira.taosdata.com:18080/browse/TD-2609
+
+        # modified for : https://jira.taosdata.com:18080/browse/TD-2627
         tdSql.execute("create table st(ts timestamp, k int)")
-        tdSql.execute("insert into st values(now, -100)")
+        tdSql.execute("insert into st values(now, -100)(now+1a,-99)")
         tdSql.query("select apercentile(k, 20) from st")
         tdSql.checkData(0, 0, -100.00)