[TD-5229]<fix>: cname display is incomplete

add method in util/sql.py---getColNameList() and checkColNameList

add testcase query/queryCnameDisplay.py

tests/pytest/query/queryCnameDisplay.py

@@ -41,7 +41,6 @@ class TDTestCase:
             cname_list.append(self.getLongName(64))
         cname_list[0] = self.getLongName(63)
         cname_list[1] = self.getLongName(65)
-        
         # create table and insert data
         tdSql.execute("CREATE TABLE regular_table_cname_check (ts timestamp, pi1 int, pi2 bigint, pf1 float, pf2 double, ps1 binary(10), pi3 smallint, pi4 tinyint, pb1 bool, ps2 nchar(20))")
         tdSql.execute('insert into regular_table_cname_check values (now, 1, 2, 1.1, 2.2, "a", 1, 1, true, "aa");')
@@ -50,12 +49,15 @@ class TDTestCase:
 
         # select as cname with cname_list
         sql_seq = f'select count(ts) as {cname_list[0]}, sum(pi1) as {cname_list[1]}, avg(pi2) as {cname_list[2]}, count(pf1) as {cname_list[3]}, count(pf2) as {cname_list[4]}, count(ps1) as {cname_list[5]}, min(pi3) as {cname_list[6]}, max(pi4) as {cname_list[7]}, count(pb1) as {cname_list[8]}, count(ps2) as {cname_list[9]} from regular_table_cname_check'
+        sql_seq_no_as = sql_seq.replace('as ', '')
         res = tdSql.getColNameList(sql_seq)
+        res_no_as = tdSql.getColNameList(sql_seq_no_as)
         
         # cname[1] > 64, it is expected to be equal to 64
         cname_list_1_expected = cname_list[1][:-1]
         cname_list[1] = cname_list_1_expected
         checkColNameList = tdSql.checkColNameList(res, cname_list)
+        checkColNameList = tdSql.checkColNameList(res_no_as, cname_list)
 
     def checkSuperTableCname(self):
         """
@@ -77,12 +79,15 @@ class TDTestCase:
 
         # select as cname with cname_list
         sql_seq = f'select count(ts) as {cname_list[0]}, sum(pi1) as {cname_list[1]}, avg(pi2) as {cname_list[2]}, count(pf1) as {cname_list[3]}, count(pf2) as {cname_list[4]}, count(ps1) as {cname_list[5]}, min(pi3) as {cname_list[6]}, max(pi4) as {cname_list[7]}, count(pb1) as {cname_list[8]}, count(ps2) as {cname_list[9]}, count(si1) as {cname_list[10]}, count(si2) as {cname_list[11]}, count(sf1) as {cname_list[12]}, count(sf2) as {cname_list[13]}, count(ss1) as {cname_list[14]}, count(si3) as {cname_list[15]}, count(si4) as {cname_list[16]}, count(sb1) as {cname_list[17]}, count(ss2) as {cname_list[18]} from super_table_cname_check'
+        sql_seq_no_as = sql_seq.replace('as ', '')
         res = tdSql.getColNameList(sql_seq)
+        res_no_as = tdSql.getColNameList(sql_seq_no_as)
 
         # cname[1] > 64, it is expected to be equal to 64
         cname_list_1_expected = cname_list[1][:-1]
         cname_list[1] = cname_list_1_expected
         checkColNameList = tdSql.checkColNameList(res, cname_list)
+        checkColNameList = tdSql.checkColNameList(res_no_as, cname_list)
         
     def run(self):
         tdSql.prepare()