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#!/usr/bin/env python
#
# Public Domain 2014-2019 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_timestamp13.py
# Timestamps: session query_timestamp
#
import random
from suite_subprocess import suite_subprocess
import wiredtiger, wttest
from wtscenario import make_scenarios
class test_timestamp13(wttest.WiredTigerTestCase, suite_subprocess):
tablename = 'test_timestamp13'
uri = 'table:' + tablename
scenarios = make_scenarios([
('col', dict(extra_config=',key_format=r')),
('lsm', dict(extra_config=',type=lsm')),
('row', dict(extra_config='')),
])
conn_config = 'log=(enabled)'
session_config = 'isolation=snapshot'
def test_degenerate_timestamps(self):
self.session.create(self.uri,
'key_format=i,value_format=i' + self.extra_config)
query_choices = ['commit', 'first_commit', 'prepare', 'read']
# Querying a session's timestamps will error when not in a transaction.
for query in query_choices:
self.assertRaises(
wiredtiger.WiredTigerError,
lambda: self.session.query_timestamp('get=' + query))
self.session.begin_transaction()
# Nothing has been set, all queries will return timestamp 0.
for query in query_choices:
self.assertTimestampsEqual(
self.session.query_timestamp('get=' + query), '0')
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError,
lambda: self.session.query_timestamp('get=unknown'),
'/not a permitted choice for key/')
self.session.commit_transaction()
# Querying a session's timestamps will error when not in a transaction.
for query in query_choices:
self.assertRaises(
wiredtiger.WiredTigerError,
lambda: self.session.query_timestamp('get=' + query))
def test_query_read_commit_timestamps(self):
self.session.create(self.uri,
'key_format=i,value_format=i' + self.extra_config)
self.session.begin_transaction('isolation=snapshot')
self.session.timestamp_transaction('read_timestamp=10')
self.assertTimestampsEqual(
self.session.query_timestamp('get=read'), '10')
# The first commit_timestamp will set both the commit and first_commit
# values.
self.session.timestamp_transaction('commit_timestamp=20')
self.assertTimestampsEqual(
self.session.query_timestamp('get=commit'), '20')
self.assertTimestampsEqual(
self.session.query_timestamp('get=first_commit'), '20')
# The second commit_timestamp will update the commit value, leaving
# first_commit alone.
self.session.timestamp_transaction('commit_timestamp=30')
self.assertTimestampsEqual(
self.session.query_timestamp('get=commit'), '30')
self.assertTimestampsEqual(
self.session.query_timestamp('get=first_commit'), '20')
self.session.commit_transaction()
def test_query_round_read_timestamp(self):
self.session.create(self.uri,
'key_format=i,value_format=i' + self.extra_config)
self.conn.set_timestamp('oldest_timestamp=10')
# Rounding to the oldest timestamp will allow the stale read_timestamp
# to succeed. The follow-up call to get the read timestamp returns the
# chosen read timestamp.
self.session.begin_transaction('isolation=snapshot,roundup_timestamps=(read=true)')
self.session.timestamp_transaction('read_timestamp=5')
self.assertTimestampsEqual(
self.session.query_timestamp('get=read'), '10')
# Moving the oldest timestamp has no bearing on the read timestamp
# returned.
self.conn.set_timestamp('oldest_timestamp=20')
self.assertTimestampsEqual(
self.session.query_timestamp('get=read'), '10')
self.session.commit_transaction()
def test_query_prepare_timestamp(self):
self.session.create(self.uri,
'key_format=i,value_format=i' + self.extra_config)
self.session.begin_transaction()
self.session.prepare_transaction('prepare_timestamp=10')
self.assertTimestampsEqual(
self.session.query_timestamp('get=prepare'), '10')
self.session.timestamp_transaction('commit_timestamp=20')
self.session.timestamp_transaction('durable_timestamp=20')
self.assertTimestampsEqual(
self.session.query_timestamp('get=prepare'), '10')
self.assertTimestampsEqual(
self.session.query_timestamp('get=commit'), '20')
self.session.commit_transaction()
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