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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 wiredtiger import WT_NOTFOUND
from wtscenario import make_scenarios
# test_prepare15.py
# Test that the prepare transaction rollback removes the on-disk key
# or replace it with history store and commit retains the changes when
# both insert and remove operations are from the same transaction.
class test_prepare15(wttest.WiredTigerTestCase):
in_memory_values = [
('no_inmem', dict(in_memory=False)),
('inmem', dict(in_memory=True))
]
key_format_values = [
('column', dict(key_format='r')),
('integer_row', dict(key_format='i')),
]
txn_end_values = [
('commit', dict(commit=True)),
('rollback', dict(commit=False)),
]
scenarios = make_scenarios(in_memory_values, key_format_values, txn_end_values)
def conn_config(self):
config = 'cache_size=50MB'
if self.in_memory:
config += ',in_memory=true'
else:
config += ',in_memory=false'
return config
def test_prepare_restore_hs_update(self):
# Create a table without logging.
uri = "table:prepare15"
create_config = 'allocation_size=512,key_format=S,value_format=S'
self.session.create(uri, create_config)
# Pin oldest and stable timestamps to 10.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(10) +
',stable_timestamp=' + self.timestamp_str(10))
valuea = 'a'
valueb = 'a'
# Perform an update and remove.
cursor = self.session.open_cursor(uri)
self.session.begin_transaction()
cursor[str(0)] = valuea
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(20))
self.session.begin_transaction()
cursor.set_key(str(0))
cursor.remove()
self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(30))
cursor.close()
# Perform an update and remove.
s = self.conn.open_session()
cursor = s.open_cursor(uri)
s.begin_transaction()
cursor[str(0)] = valueb
cursor.set_key(str(0))
cursor.remove()
cursor.close()
s.prepare_transaction('prepare_timestamp=' + self.timestamp_str(40))
# Configure debug behavior on a cursor to evict the page positioned on when the reset API is used.
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search for the key so we position our cursor on the page that we want to evict.
self.session.begin_transaction('ignore_prepare = true')
evict_cursor.set_key(str(0))
self.assertEquals(evict_cursor.search(), WT_NOTFOUND)
evict_cursor.reset()
evict_cursor.close()
self.session.commit_transaction()
if self.commit:
# Commit the prepared transaction
s.timestamp_transaction('commit_timestamp=' + self.timestamp_str(50))
s.timestamp_transaction('durable_timestamp=' + self.timestamp_str(60))
s.commit_transaction()
else:
# Rollback the prepared transaction
s.rollback_transaction()
# Configure debug behavior on a cursor to evict the page positioned on when the reset API is used.
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search for the key so we position our cursor on the page that we want to evict.
self.session.begin_transaction()
evict_cursor.set_key(str(0))
self.assertEquals(evict_cursor.search(), WT_NOTFOUND)
evict_cursor.reset()
evict_cursor.close()
self.session.commit_transaction()
self.session.begin_transaction('read_timestamp=' + self.timestamp_str(20))
cursor2 = self.session.open_cursor(uri)
cursor2.set_key(str(0))
self.assertEquals(cursor2.search(), 0)
self.assertEqual(cursor2.get_value(), valuea)
self.session.commit_transaction()
def test_prepare_not_found(self):
# Create a table without logging.
uri = "table:prepare15"
create_config = 'allocation_size=512,key_format=S,value_format=S'
self.session.create(uri, create_config)
# Pin oldest and stable timestamps to 10.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(10) +
',stable_timestamp=' + self.timestamp_str(10))
value = 'a'
# Perform an update and remove.
s = self.conn.open_session()
cursor = s.open_cursor(uri)
s.begin_transaction()
cursor[str(0)] = value
cursor.set_key(str(0))
cursor.remove()
cursor.close()
s.prepare_transaction('prepare_timestamp=' + self.timestamp_str(20))
# Configure debug behavior on a cursor to evict the page positioned on when the reset API is used.
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search for the key so we position our cursor on the page that we want to evict.
self.session.begin_transaction("ignore_prepare = true")
evict_cursor.set_key(str(0))
self.assertEquals(evict_cursor.search(), WT_NOTFOUND)
evict_cursor.reset()
evict_cursor.close()
self.session.commit_transaction()
if self.commit:
# Commit the prepared transaction
s.timestamp_transaction('commit_timestamp=' + self.timestamp_str(30))
s.timestamp_transaction('durable_timestamp=' + self.timestamp_str(40))
s.commit_transaction()
else:
# Rollback the prepared transaction
s.rollback_transaction()
# Configure debug behavior on a cursor to evict the page positioned on when the reset API is used.
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
# Search for the key so we position our cursor on the page that we want to evict.
self.session.begin_transaction()
evict_cursor.set_key(str(0))
self.assertEquals(evict_cursor.search(), WT_NOTFOUND)
evict_cursor.reset()
evict_cursor.close()
self.session.commit_transaction()
self.session.begin_transaction()
cursor2 = self.session.open_cursor(uri)
cursor2.set_key(str(0))
self.assertEquals(cursor2.search(), WT_NOTFOUND)
self.session.commit_transaction()
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