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#!/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.
import wttest
from wtscenario import make_scenarios
# test_hs23.py
# Test the case that we have update, out of order timestamp
# update, and update again in the same transaction
class test_hs23(wttest.WiredTigerTestCase):
conn_config = 'cache_size=50MB'
format_values = [
('column', dict(key_format='r', key=1, value_format='S')),
('column-fix', dict(key_format='r', key=1, value_format='8t')),
('string-row', dict(key_format='S', key=str(0), value_format='S')),
]
scenarios = make_scenarios(format_values)
def test(self):
uri = 'table:test_hs23'
format = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
self.session.create(uri, format)
cursor = self.session.open_cursor(uri)
self.conn.set_timestamp(
'oldest_timestamp=' + self.timestamp_str(1) + ',stable_timestamp=' + self.timestamp_str(1))
key = self.key
if self.value_format == '8t':
value1 = 97 # 'a'
value2 = 98 # 'b'
value3 = 99 # 'c'
value4 = 100 # 'd'
value5 = 101 # 'e'
else:
value1 = 'a'
value2 = 'b'
value3 = 'c'
value4 = 'd'
value5 = 'e'
# Insert a key.
self.session.begin_transaction()
cursor[key] = value1
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(2))
# Update at 10, update at 20, update at 15 (out of order), and
# update at 20 in the same transaction
self.session.begin_transaction()
cursor.set_key(key)
cursor.set_value(value2)
self.session.timestamp_transaction(
'commit_timestamp=' + self.timestamp_str(10))
self.assertEquals(cursor.update(), 0)
cursor.set_key(key)
cursor.set_value(value3)
self.session.timestamp_transaction(
'commit_timestamp=' + self.timestamp_str(20))
self.assertEquals(cursor.update(), 0)
cursor.set_key(key)
cursor.set_value(value4)
self.session.timestamp_transaction(
'commit_timestamp=' + self.timestamp_str(15))
self.assertEquals(cursor.update(), 0)
cursor.set_key(key)
cursor.set_value(value5)
self.session.timestamp_transaction(
'commit_timestamp=' + self.timestamp_str(20))
self.assertEquals(cursor.update(), 0)
self.session.commit_transaction()
# Do a checkpoint to trigger
# history store reconciliation.
self.session.checkpoint()
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search the key to evict it.
self.session.begin_transaction()
self.assertEqual(evict_cursor[key], value5)
self.assertEqual(evict_cursor.reset(), 0)
self.session.rollback_transaction()
# Search the latest update
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(20))
self.assertEqual(cursor[key], value5)
self.session.rollback_transaction()
# Search the out of order timestamp update
self.session.begin_transaction("read_timestamp=" + self.timestamp_str(15))
self.assertEqual(cursor[key], value4)
self.session.rollback_transaction()
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