test: Add tests of uniqueness and non-emptiness of col names

tests/pytest/table/columnNameValidation.py

+# -*- coding: utf-8 -*-
+
+import sys
+import string
+import random
+import subprocess
+from util.log import *
+from util.cases import *
+from util.sql import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.prepare()
+        
+        tdSql.query('show tables')
+        tdSql.checkRows(0)
+
+        # uniqueness
+        tdSql.error("create table t (t timestamp, f int, F int)")
+        tdSql.error("create table t (t timestamp, `f` int, F int)")
+        tdSql.error("create table t (t timestamp, `f` int, `f` int)")
+        tdSql.execute("create table t (t timestamp, `f` int, `F` int)")
+        tdSql.query("show tables")
+        tdSql.checkRows(1)
+        tdSql.execute("drop table t")
+
+        tdSql.error("create table t (t timestamp, f int, `F` int) tags (T int)")
+        tdSql.error("create table t (t timestamp, f int, `F` int) tags (`T` int, `T` int)")
+        tdSql.execute("create table t (t timestamp, f int, `F` int) tags (`T` int)")
+        tdSql.query("show stables")
+        tdSql.checkRows(1)
+        tdSql.execute("drop table t")
+        
+        # non-emptiness
+        tdSql.error("create table t (t timestamp, `` int)")
+        tdSql.error("create table t (t timestamp, `f` int) tags (`` int)")
+        tdSql.query("show tables")
+        tdSql.checkRows(0)
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())