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#!/usr/bin/env python
#
# Public Domain 2014-2020 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 wiredtiger, wttest
def timestamp_str(t):
return '%x' % t
# test_hs11.py
# Ensure that when we delete a key due to a tombstone being globally visible, we delete its
# associated history store content.
class test_hs11(wttest.WiredTigerTestCase):
conn_config = 'cache_size=50MB'
session_config = 'isolation=snapshot'
def test_key_deletion_clears_hs(self):
uri = 'table:test_hs11'
create_params = 'key_format=S,value_format=S'
self.session.create(uri, create_params)
value1 = 'a' * 500
value2 = 'b' * 500
# Apply a series of updates from timestamps 1-4.
self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(1))
cursor = self.session.open_cursor(uri)
for ts in range(1, 5):
for i in range(1, 10000):
self.session.begin_transaction()
cursor[str(i)] = value1
self.session.commit_transaction('commit_timestamp=' + timestamp_str(ts))
# Reconcile and flush versions 1-3 to the history store.
self.session.checkpoint()
# Apply a non-timestamped tombstone. When the pages get evicted, the keys will get deleted
# since the tombstone is globally visible.
for i in range(1, 10000):
if i % 2 == 0:
cursor.set_key(str(i))
cursor.remove()
# Now apply an update at timestamp 10 to recreate each key.
for i in range(1, 10000):
self.session.begin_transaction()
cursor[str(i)] = value2
self.session.commit_transaction('commit_timestamp=' + timestamp_str(10))
# Ensure that we blew away history store content.
for ts in range(1, 5):
self.session.begin_transaction('read_timestamp=' + timestamp_str(ts))
for i in range(1, 10000):
if i % 2 == 0:
cursor.set_key(str(i))
self.assertEqual(cursor.search(), wiredtiger.WT_NOTFOUND)
else:
self.assertEqual(cursor[str(i)], value1)
self.session.rollback_transaction()
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