[TD-6314]<test>:add test case for _block_dist()

tests/pytest/query/query.py

@@ -18,6 +18,7 @@ from util.cases import tdCases
 from util.sql import tdSql
 from util.dnodes import tdDnodes
 
+
 class TDTestCase:
     def init(self, conn, logSql):
         tdLog.debug("start to execute %s" % __file__)
@@ -82,7 +83,8 @@ class TDTestCase:
         ## test case for https://jira.taosdata.com:18080/browse/TD-1930
         tdSql.execute("create table tb(ts timestamp, c1 int, c2 binary(10), c3 nchar(10), c4 float, c5 bool)")
         for i in range(10):
-            tdSql.execute("insert into tb values(%d, %d, 'binary%d', 'nchar%d', %f, %d)" % (self.ts + i, i, i, i, i + 0.1, i % 2))
+            tdSql.execute(
+                "insert into tb values(%d, %d, 'binary%d', 'nchar%d', %f, %d)" % (self.ts + i, i, i, i, i + 0.1, i % 2))
 
         tdSql.error("select * from tb where c2 = binary2")
         tdSql.error("select * from tb where c3 = nchar2")
@@ -119,9 +121,14 @@ class TDTestCase:
         tdSql.query("select * from tb")
         tdSql.checkRows(1)
 
-        tdSql.query("select * from tb0")
+        # For jira:https://jira.taosdata.com:18080/browse/TD-6314
+        tdSql.execute("use db")
+        tdSql.execute("create stable stb_001(ts timestamp,v int) tags(c0 int)")
+        tdSql.query("select _block_dist() from stb_001")
         tdSql.checkRows(1)
 
+        tdSql.query("select * from tb0")
+        tdSql.checkRows(1)
 
     def stop(self):
         tdSql.close()