fix: add test case

tests/parallel_test/cases.task

@@ -632,6 +632,8 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/case_when.py -R
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/blockSMA.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/blockSMA.py -R
+,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/projectionDesc.py
+,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/projectionDesc.py -R
 ,,y,system-test,./pytest.sh python3 ./test.py -f 1-insert/update_data.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 1-insert/tb_100w_data_order.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 1-insert/delete_stable.py
@@ -655,6 +657,7 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/csum.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/function_diff.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/tagFilter.py
+,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/projectionDesc.py
 ,,n,system-test,python3 ./test.py -f 2-query/queryQnode.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 6-cluster/5dnode1mnode.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 6-cluster/5dnode2mnode.py -N 5
@@ -854,6 +857,7 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/sml.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/case_when.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/blockSMA.py -Q 2
+,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/projectionDesc.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 99-TDcase/TD-21561.py -Q 2
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/between.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/distinct.py -Q 3
@@ -952,6 +956,7 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/interp.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/case_when.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/blockSMA.py -Q 3
+,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/projectionDesc.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 99-TDcase/TD-21561.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/between.py -Q 4
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/distinct.py -Q 4
@@ -1070,6 +1075,7 @@
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/max_min_data.py -Q 3
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/max_min_data.py -Q 4
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/blockSMA.py -Q 4
+,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/projectionDesc.py -Q 4
 ,,y,system-test,./pytest.sh python3 ./test.py -f 2-query/odbc.py
 ,,y,system-test,./pytest.sh python3 ./test.py -f 99-TDcase/TD-21561.py -Q 4
 ,,y,system-test,./pytest.sh python3 ./test.py -f 99-TDcase/TD-20582.py

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

@@ -0,0 +1,47 @@
+from wsgiref.headers import tspecials
+from util.log import *
+from util.cases import *
+from util.sql import *
+import numpy as np
+
+
+class TDTestCase:
+    def init(self, conn, logSql, replicaVar=1):
+        self.replicaVar = int(replicaVar)
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor())
+
+        self.rowNum = 10
+        self.batchNum = 5
+        self.ts = 1537146000000
+
+    def run(self):
+        dbname = "db"
+        tdSql.prepare()
+
+        intData = []
+        floatData = []
+
+        tdSql.execute(f'''create table {dbname}.stb(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) tags(loc nchar(20))''')
+        tdSql.execute(f"create table {dbname}.stb_1 using {dbname}.stb tags('beijing')")
+        for n in range(self.batchNum):
+            for i in range(self.rowNum):
+                tdSql.execute(f"insert into {dbname}.stb_1 values(%d, %d, %d, %d, %d, %f, %f, %d, 'taosdata%d', '涛思数据%d', %d, %d, %d, %d)"
+                            % (self.ts, 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)
+            tdSql.execute(f"flush database {dbname}")
+
+        tdSql.query(f"select * from {dbname}.stb_1 order by ts desc")
+        tdSql.checkRows(1)
+        #tdSql.checkData(0,0,1537146000000)
+        tdSql.checkData(0,1,10)
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())