#!/usr/bin/env python # # Public Domain 2014-present MongoDB, Inc. # Public Domain 2008-2014 WiredTiger, Inc. # # This is free and unencumbered software released into the public domain. # # Anyone is free to copy, modify, publish, use, compile, sell, or # distribute this software, either in source code form or as a compiled # binary, for any purpose, commercial or non-commercial, and by any # means. # # In jurisdictions that recognize copyright laws, the author or authors # of this software dedicate any and all copyright interest in the # software to the public domain. We make this dedication for the benefit # of the public at large and to the detriment of our heirs and # successors. We intend this dedication to be an overt act of # relinquishment in perpetuity of all present and future rights to this # software under copyright law. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. # IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR # OTHER DEALINGS IN THE SOFTWARE. # # test_timestamp17.py # Test unintended timestamp usage on an update and ensure behavior # matches expectations. Additionally, move the timestamp to ensure # that values read are still consistent after those timestamps are # moved. # import random from suite_subprocess import suite_subprocess import wiredtiger, wttest from wtscenario import make_scenarios def timestamp_str(t): return '%x' % t class test_timestamp17(wttest.WiredTigerTestCase, suite_subprocess): tablename = 'test_timestamp17' uri = 'table:' + tablename session_config = 'isolation=snapshot' def test_inconsistent_timestamping(self): self.session.create(self.uri, 'key_format=i,value_format=i') self.session.begin_transaction() cur1 = self.session.open_cursor(self.uri) cur1[1] = 1 self.session.commit_transaction('commit_timestamp=25') self.session.begin_transaction() cur1[1] = 2 self.session.commit_transaction('commit_timestamp=50') self.session.begin_transaction() cur1[1] = 3 self.session.commit_transaction('commit_timestamp=200') self.session.begin_transaction() cur1.set_key(1) cur1.remove() self.session.commit_transaction('commit_timestamp=100') # Read before any updates and ensure we cannot find the key or value. self.session.begin_transaction('read_timestamp=20') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, wiredtiger.WT_NOTFOUND) self.session.commit_transaction() # Read at 25 and we should see 1. self.session.begin_transaction('read_timestamp=25') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, 0) value1 = cur1.get_value() self.session.commit_transaction() self.assertEqual(1, value1) # Read at 50 and we should see 2. self.session.begin_transaction('read_timestamp=50') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, 0) value1 = cur1.get_value() self.session.commit_transaction() self.assertEqual(2, value1) # Read at 100 and we should not find anything. self.session.begin_transaction('read_timestamp=100') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, wiredtiger.WT_NOTFOUND) self.session.commit_transaction() # Read at 200 and we should still not find anything. self.session.begin_transaction('read_timestamp=200') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, wiredtiger.WT_NOTFOUND) self.session.commit_transaction() # Read at 300 for further validation. self.session.begin_transaction('read_timestamp=300') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, wiredtiger.WT_NOTFOUND) self.session.commit_transaction() # Move oldest timestamp forward and # confirm we see the correct numbers. self.conn.set_timestamp('oldest_timestamp=49') # Read at 49 and we should see 1. self.session.begin_transaction('read_timestamp=49') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, 0) value1 = cur1.get_value() self.session.commit_transaction() self.assertEqual(1, value1) self.conn.set_timestamp('oldest_timestamp=99') # Read at 99 and we should see 2. self.session.begin_transaction('read_timestamp=99') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, 0) value1 = cur1.get_value() self.session.commit_transaction() self.assertEqual(2, value1) # Move oldest to the point at which we deleted. self.conn.set_timestamp('oldest_timestamp=100') # Read at 100 and we should not find anything. self.session.begin_transaction('read_timestamp=100') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, wiredtiger.WT_NOTFOUND) self.session.commit_transaction() # Read at 200 and we should not find anything. self.session.begin_transaction('read_timestamp=200') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, wiredtiger.WT_NOTFOUND) self.session.commit_transaction() # Move oldest timestamp to 200 to ensure history # works as expected and we do not see the value 3. self.conn.set_timestamp('oldest_timestamp=200') self.session.begin_transaction('read_timestamp=200') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, wiredtiger.WT_NOTFOUND) self.session.commit_transaction() self.session.begin_transaction('read_timestamp=250') cur1.set_key(1) search_success = cur1.search() self.assertEqual(search_success, wiredtiger.WT_NOTFOUND) self.session.commit_transaction() if __name__ == '__main__': wttest.run()