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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.
#
# test_prepare13.py
# Fast-truncate fails when a page contains prepared updates.
import wiredtiger, wttest
from wtdataset import simple_key, simple_value
def timestamp_str(t):
return '%x' % t
class test_prepare13(wttest.WiredTigerTestCase):
# Force a small cache.
conn_config = 'cache_size=10MB,statistics=(all),statistics_log=(json,on_close,wait=1)'
def test_prepare(self):
nrows = 20000
# Pin oldest and stable to timestamp 1.
self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(1) +
',stable_timestamp=' + timestamp_str(1))
# Create a large table with lots of pages.
uri = "table:test_prepare13"
config = 'allocation_size=512,leaf_page_max=512,key_format=S,value_format=S'
self.session.create(uri, config)
cursor = self.session.open_cursor(uri)
for i in range(1, nrows):
cursor[simple_key(cursor, i)] = simple_value(cursor, i)
cursor.close()
# Prepare a record.
self.session.begin_transaction()
cursor = self.session.open_cursor(uri)
cursor[simple_key(cursor, 1000)] = "replacement_value"
cursor.close()
self.session.prepare_transaction('prepare_timestamp=' + timestamp_str(10))
try:
# Pin oldest and stable to timestamp 10.
self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(10) +
',stable_timestamp=' + timestamp_str(10))
# Open a separate session and cursor and perform updates to let prepared update to evict.
s = self.conn.open_session()
cursor = s.open_cursor(uri, None)
for i in range(2000, nrows):
s.begin_transaction()
cursor[simple_key(cursor, i)] = simple_value(cursor, i)
s.commit_transaction('commit_timestamp=' + timestamp_str(20))
cursor.close()
# Truncate the middle chunk and expect a conflict.
preparemsg = '/conflict with a prepared update/'
s.begin_transaction()
c1 = s.open_cursor(uri, None)
c1.set_key(simple_key(c1, 100))
c2 = s.open_cursor(uri, None)
c2.set_key(simple_key(c1, nrows))
self.assertRaisesException(wiredtiger.WiredTigerError, lambda:s.truncate(None, c1, c2, None), preparemsg)
c1.close()
c2.close()
s.rollback_transaction()
finally:
self.session.timestamp_transaction('commit_timestamp=' + timestamp_str(50))
self.session.timestamp_transaction('durable_timestamp=' + timestamp_str(50))
self.session.commit_transaction()
s.close()
if __name__ == '__main__':
wttest.run()
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