mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-19 06:50:50 +00:00
82 lines
2.1 KiB
Python
82 lines
2.1 KiB
Python
#!/usr/bin/env python
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import subprocess
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import threading
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import Queue as queue
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import os
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import sys
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import signal
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CLICKHOUSE_CLIENT = os.environ.get('CLICKHOUSE_CLIENT')
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CLICKHOUSE_CURL = os.environ.get('CLICKHOUSE_CURL')
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CLICKHOUSE_URL = os.environ.get('CLICKHOUSE_URL')
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def send_query(query):
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cmd = list(CLICKHOUSE_CLIENT.split())
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cmd += ['--query', query]
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# print(cmd)
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return subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT).stdout
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def send_query_in_process_group(query):
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cmd = list(CLICKHOUSE_CLIENT.split())
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cmd += ['--query', query]
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print(cmd)
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return subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, preexec_fn=os.setsid)
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def read_lines_and_push_to_queue(pipe, queue):
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try:
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for line in iter(pipe.readline, ''):
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line = line.strip()
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print(line)
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sys.stdout.flush()
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queue.put(line)
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except KeyboardInterrupt:
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pass
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queue.put(None)
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def test():
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send_query('DROP TABLE IF EXISTS test.lv').read()
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send_query('DROP TABLE IF EXISTS test.mt').read()
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send_query('CREATE TABLE test.mt (a Int32) Engine=MergeTree order by tuple()').read()
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send_query('CREATE TEMPORARY LIVE VIEW test.lv AS SELECT sum(a) FROM test.mt').read()
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q = queue.Queue()
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p = send_query_in_process_group('WATCH test.lv')
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thread = threading.Thread(target=read_lines_and_push_to_queue, args=(p.stdout, q))
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thread.start()
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line = q.get()
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print(line)
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assert (line == '0\t1')
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send_query('INSERT INTO test.mt VALUES (1),(2),(3)').read()
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line = q.get()
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print(line)
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assert (line == '6\t2')
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send_query('INSERT INTO test.mt VALUES (4),(5),(6)').read()
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line = q.get()
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print(line)
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assert (line == '21\t3')
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# Send Ctrl+C to client.
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os.killpg(os.getpgid(p.pid), signal.SIGINT)
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# This insert shouldn't affect lv.
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send_query('INSERT INTO test.mt VALUES (7),(8),(9)').read()
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line = q.get()
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print(line)
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assert (line is None)
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send_query('DROP TABLE if exists test.lv').read()
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send_query('DROP TABLE if exists test.lv').read()
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thread.join()
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test()
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