Fixing live view refresh test.

Adding live view refresh with dictionary test.

tests/queries/0_stateless/00962_live_view_periodic_refresh.py

@@ -10,7 +10,7 @@ from client import client, prompt, end_of_block
 
 log = None
 # uncomment the line below for debugging
-log=sys.stdout
+#log=sys.stdout
 
 with client(name='client1>', log=log) as client1, client(name='client2>', log=log) as client2:
     client1.expect(prompt)

tests/queries/0_stateless/00962_live_view_periodic_refresh_dictionary.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+import os
+import sys
+import signal
+
+CURDIR = os.path.dirname(os.path.realpath(__file__))
+sys.path.insert(0, os.path.join(CURDIR, 'helpers'))
+
+from client import client, prompt, end_of_block
+
+log = None
+# uncomment the line below for debugging
+#log=sys.stdout
+
+with client(name='client1>', log=log) as client1, client(name='client2>', log=log) as client2:
+    client1.expect(prompt)
+    client2.expect(prompt)
+
+    client1.send('SET allow_experimental_live_view = 1')
+    client1.expect(prompt)
+    client2.send('SET allow_experimental_live_view = 1')
+    client2.expect(prompt)
+
+    client1.send('DROP TABLE IF EXISTS test.lv')
+    client1.expect(prompt)
+    client1.send('DROP TABLE IF EXISTS test.mt')
+    client1.expect(prompt)
+    client1.send('DROP DICTIONARY IF EXITS test.dict')
+    client1.expect(prompt)
+    
+    client1.send("CREATE TABLE test.mt (a Int32, b Int32) Engine=MergeTree order by tuple()")
+    client1.expect(prompt)
+    client1.send("CREATE DICTIONARY test.dict(a Int32, b Int32) PRIMARY KEY a LAYOUT(FLAT()) " + \
+                 "SOURCE(CLICKHOUSE(db 'test' table 'mt')) LIFETIME(1)")
+    client1.expect(prompt)   
+    client1.send("CREATE LIVE VIEW test.lv WITH REFRESH 1 AS SELECT * FROM test.dict")
+    client1.expect(prompt)
+
+    client2.send("INSERT INTO test.mt VALUES (1,2)")
+    client2.expect(prompt) 
+
+    client1.send('WATCH test.lv FORMAT JSONEachRow')
+    client1.expect(r'"_version":"1"')
+    
+    client2.send("INSERT INTO test.mt VALUES (2,2)")
+    client2.expect(prompt) 
+    client1.expect(r'"_version":"2"')
+    
+    client2.send("INSERT INTO test.mt VALUES (3,2)")
+    client2.expect(prompt)    
+    client1.expect(r'"_version":"3"')
+    
+    # send Ctrl-C
+    client1.send('\x03', eol='')
+    match = client1.expect('(%s)|([#\$] )' % prompt)
+    if match.groups()[1]:
+        client1.send(client1.command)
+        client1.expect(prompt)
+
+    client1.send('DROP TABLE IF EXISTS test.lv')
+    client1.expect(prompt)
+    client1.send('DROP DICTIONARY IF EXISTS test.dict')
+    client1.expect(prompt)
+    client1.send('DROP TABLE IF EXISTS test.mt')
+    client1.expect(prompt)
+    
+    
+