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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.
#
# test_prepare_conflict.py
# Evict a page while in the fast-truncate state.
#
import wiredtiger, wttest
from wtdataset import simple_key, simple_value
def timestamp_str(t):
return '%x' % t
class test_prepare_conflict(wttest.WiredTigerTestCase):
def test_prepare(self):
# Create a large table with lots of pages.
uri = "table:test_prepare_conflict"
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, 80000):
cursor[simple_key(cursor, i)] = simple_value(cursor, i)
cursor.close()
# Force to disk.
self.reopen_conn()
# Start a transaction.
self.session.begin_transaction('isolation=snapshot')
# Truncate the middle chunk.
c1 = self.session.open_cursor(uri, None)
c1.set_key(simple_key(c1, 10000))
c2 = self.session.open_cursor(uri, None)
c2.set_key(simple_key(c1, 70000))
self.session.truncate(None, c1, c2, None)
c1.close()
c2.close()
# Modify a record on a fast-truncate page.
cursor = self.session.open_cursor(uri)
cursor[simple_key(cursor, 40000)] = "replacement_value"
cursor.close()
# Prepare and commit the transaction.
self.session.prepare_transaction('prepare_timestamp=' + timestamp_str(10))
self.session.timestamp_transaction('commit_timestamp=' + timestamp_str(20))
self.session.timestamp_transaction('durable_timestamp=' + timestamp_str(20))
self.session.commit_transaction()
# WT-6325 reports WT_PREPARE_CONFLICT while iterating the cursor.
# Walk the table, the bug will cause a prepared conflict return.
cursor = self.session.open_cursor(uri)
while cursor.next() == 0:
continue
cursor.close()
if __name__ == '__main__':
wttest.run()
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