add case for apercentile

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

@@ -0,0 +1,99 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+from util.log import *
+from util.cases import *
+from util.sql import *
+import numpy as np
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor())
+
+        self.rowNum = 10
+        self.ts = 1537146000000
+        
+    def check_apercentile(self,data,expect_data,param,percent):
+        if param == "default":
+            if abs((expect_data-data) <= expect_data * 0.2):
+                tdLog.info(f"apercentile function values check success with param={param},percent={percent}")
+            else:
+                tdLog.notice(f"apercentile function value has not as expected with param={param},percent={percent}")
+                sys.exit(1)
+            
+        elif param == "t-digest":
+            if abs((expect_data-data) <= expect_data * 0.2):
+                tdLog.info(f"apercentile function values check success with param={param},percent={percent}")
+            else:
+                tdLog.notice(f"apercentile function value has not as expected with param={param},percent={percent}")
+                sys.exit(1)
+
+    def run(self):
+        tdSql.prepare()
+
+        intData = []        
+        floatData = []
+
+        tdSql.execute('''create table test(ts timestamp, col1 tinyint, col2 smallint, col3 int, col4 bigint, col5 float, col6 double, 
+                    col7 bool, col8 binary(20), col9 nchar(20), col11 tinyint unsigned, col12 smallint unsigned, col13 int unsigned, col14 bigint unsigned)''')
+        for i in range(self.rowNum):
+            tdSql.execute("insert into test values(%d, %d, %d, %d, %d, %f, %f, %d, 'taosdata%d', '涛思数据%d', %d, %d, %d, %d)" 
+                        % (self.ts + i, i + 1, i + 1, i + 1, i + 1, i + 0.1, i + 0.1, i % 2, i + 1, i + 1, i + 1, i + 1, i + 1, i + 1))
+            intData.append(i + 1)            
+            floatData.append(i + 0.1)                        
+
+        # percentile verifacation 
+        
+        tdSql.error("select apercentile(ts ,20) from test")
+        tdSql.error("select apercentile(col7 ,20) from test") 
+        tdSql.error("select apercentile(col8 ,20) from test")
+        tdSql.error("select apercentile(col9 ,20) from test")    
+
+        column_list = [1,2,3,4,5,6,11,12,13,14]
+        percent_list = [0,50,100]
+        param_list = ['default','t-digest']
+        for i in column_list:
+            for j in percent_list:
+                for k in param_list:
+                    tdSql.query(f"select apercentile(col{i},{j},'{k}') from test")
+                    data = tdSql.getData(0, 0)
+                    tdSql.query(f"select percentile(col{i},{j}) from test")
+                    expect_data = tdSql.getData(0, 0)
+                    self.check_apercentile(data,expect_data,k) 
+
+        tdSql.execute("create table meters (ts timestamp, voltage int) tags(loc nchar(20))")
+        tdSql.execute("create table t0 using meters tags('beijing')")
+        tdSql.execute("create table t1 using meters tags('shanghai')")
+        for i in range(self.rowNum):
+            tdSql.execute("insert into t0 values(%d, %d)" % (self.ts + i, i + 1))            
+            tdSql.execute("insert into t1 values(%d, %d)" % (self.ts + i, i + 1))            
+        
+        tdSql.query("select apercentile(voltage, 20) from meters")
+        print("apercentile result: %s" % tdSql.getData(0, 0))
+
+ 
+        tdSql.execute("create table st(ts timestamp, k int)")
+        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)
+
+
+        
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())