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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.
from test_rollback_to_stable01 import test_rollback_to_stable_base
from wiredtiger import stat, Modify, WT_NOTFOUND
from wtdataset import SimpleDataSet
from wtscenario import make_scenarios
# test_rollback_to_stable27.py
#
# Test mixing timestamped and non-timestamped updates on the same VLCS RLE cell.
class test_rollback_to_stable27(test_rollback_to_stable_base):
session_config = 'isolation=snapshot'
# Run it all on row-store as well as a control group: if something odd arises from the
# RLE cell handling it won't happen in row-store.
key_format_values = [
('column', dict(key_format='r')),
('integer_row', dict(key_format='i')),
]
in_memory_values = [
('no_inmem', dict(in_memory=False)),
('inmem', dict(in_memory=True))
]
scenarios = make_scenarios(key_format_values, in_memory_values)
def conn_config(self):
if self.in_memory:
return 'in_memory=true'
else:
return 'in_memory=false'
# Evict the page to force reconciliation.
def evict(self, uri, key, check_value):
evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
self.session.begin_transaction()
v = evict_cursor[1]
self.assertEqual(v, check_value)
self.assertEqual(evict_cursor.reset(), 0)
self.session.rollback_transaction()
evict_cursor.close()
def test_rollback_to_stable(self):
nrows = 10
# Create a table without logging.
uri = "table:rollback_to_stable27"
ds = SimpleDataSet(
self, uri, 0, key_format=self.key_format, value_format="S", config='log=(enabled=false)')
ds.populate()
value_a = "aaaaa" * 10
value_b = "bbbbb" * 10
# Pin oldest and stable to timestamp 10.
self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(10) +
',stable_timestamp=' + self.timestamp_str(10))
# Write aaaaaa to all the keys at time 20.
self.large_updates(uri, value_a, ds, nrows, False, 20)
# Evict the page to force reconciliation.
self.evict(uri, 1, value_a)
# Ideally here we'd check to make sure we actually have a single RLE cell, because
# if not the rest of the work isn't going to do much good. Maybe via stats...?
cursor = self.session.open_cursor(uri)
self.session.begin_transaction()
cursor[7] = value_b
self.session.commit_transaction()
cursor.close()
# Now roll back.
self.conn.set_timestamp('stable_timestamp=' + self.timestamp_str(15))
self.conn.rollback_to_stable()
# The only thing we should see (at any time) is value_b at key 7.
cursor = self.session.open_cursor(uri)
for ts in [10, 20, 30]:
self.session.begin_transaction('read_timestamp=' + self.timestamp_str(ts))
for k, v in cursor:
self.assertEqual(k, 7)
self.assertEqual(v, value_b)
self.session.rollback_transaction()
cursor.close()
if __name__ == '__main__':
wttest.run()
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