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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.
import wiredtiger, wttest
from wtscenario import make_scenarios
# test_prepare03.py
# Prepare: Cursor API usage generates expected error in prepared state.
# Pattern of test script is to invoke cursor operations in prepared transaction
# state to ensure they fail and to repeat same operations in non-prepared state
# to ensure normally they pass.
class test_prepare03(wttest.WiredTigerTestCase):
"""
Test basic operations
"""
table_name = 'test_prepare_cursor'
nentries = 10
session_config = 'isolation=snapshot'
scenarios = make_scenarios([
('file-col', dict(tablekind='col',uri='file', format='key_format=r,value_format=S')),
('file-fix', dict(tablekind='fix',uri='file', format='key_format=r,value_format=8t')),
('file-row', dict(tablekind='row',uri='file', format='key_format=S,value_format=S')),
('lsm-row', dict(tablekind='row',uri='lsm', format='key_format=S,value_format=S')),
('table-col', dict(tablekind='col',uri='table', format='key_format=r,value_format=S')),
('table-fix', dict(tablekind='fix',uri='table', format='key_format=r,value_format=8t')),
('table-row', dict(tablekind='row',uri='table', format='key_format=S,value_format=S'))
])
def genkey(self, i):
if self.tablekind == 'row':
return 'key' + str(i)
else:
return self.recno(i+1)
def genvalue(self, i):
if self.tablekind == 'fix':
return int(i & 0xff)
else:
return 'value' + str(i)
def assertCursorHasNoKeyValue(self, cursor):
keymsg = '/requires key be set/'
valuemsg = '/requires value be set/'
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, cursor.get_key, keymsg)
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, cursor.get_value, valuemsg)
# Create the table and test cursor operations.
def test_prepare_cursor(self):
tablearg = self.uri + ':' + self.table_name
create_args = self.format
preparemsg = "/ not permitted in a prepared transaction/"
self.pr('creating session: ' + create_args)
self.session.create(tablearg, create_args)
self.pr('creating cursor')
cursor = self.session.open_cursor(tablearg, None, None)
self.assertCursorHasNoKeyValue(cursor)
self.assertEqual(cursor.uri, tablearg)
# Check insert operation
for i in range(0, self.nentries):
self.session.begin_transaction()
cursor.set_key(self.genkey(i))
cursor.set_value(self.genvalue(i))
self.session.prepare_transaction("prepare_timestamp=2a")
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.insert(), preparemsg)
self.session.timestamp_transaction("commit_timestamp=2b")
self.session.timestamp_transaction("durable_timestamp=2b")
self.session.commit_transaction()
cursor.insert()
# Check next, get_key, get_value operations.
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
i = 0
while True:
self.session.begin_transaction()
self.session.prepare_transaction("prepare_timestamp=2a")
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.next(), preparemsg)
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.get_key(), preparemsg)
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.get_value(), preparemsg)
self.session.timestamp_transaction("commit_timestamp=2b")
self.session.timestamp_transaction("durable_timestamp=2b")
self.session.commit_transaction()
nextret = cursor.next()
if nextret != 0:
break
key = cursor.get_key()
value = cursor.get_value()
self.assertEqual(key, self.genkey(i))
self.assertEqual(value, self.genvalue(i))
i += 1
self.assertEqual(i, self.nentries)
self.assertEqual(nextret, wiredtiger.WT_NOTFOUND)
self.assertCursorHasNoKeyValue(cursor)
# Check prev operation
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
i = self.nentries - 1
while True:
self.session.begin_transaction()
self.session.prepare_transaction("prepare_timestamp=2a")
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.prev(), preparemsg)
self.session.timestamp_transaction("commit_timestamp=2b")
self.session.timestamp_transaction("durable_timestamp=2b")
self.session.commit_transaction()
prevret = cursor.prev()
if prevret != 0:
break
key = cursor.get_key()
value = cursor.get_value()
self.assertEqual(key, self.genkey(i))
self.assertEqual(value, self.genvalue(i))
i -= 1
self.assertEqual(i, -1)
self.assertEqual(prevret, wiredtiger.WT_NOTFOUND)
self.assertCursorHasNoKeyValue(cursor)
# Check search, update, remove, reserve, reconfigure operations.
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
# Search for a specific key.
# Verify we get the expected error and then later we can update and
# remove it.
cursor.set_key(self.genkey(self.nentries//2))
self.session.begin_transaction()
self.session.prepare_transaction("prepare_timestamp=2a")
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.search(), preparemsg)
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.update(), preparemsg)
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.remove(), preparemsg)
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.reserve(), preparemsg)
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.reconfigure(), preparemsg)
self.session.timestamp_transaction("commit_timestamp=2b")
self.session.timestamp_transaction("durable_timestamp=2b")
self.session.commit_transaction()
cursor.search()
cursor.set_value(self.genvalue(self.nentries + self.nentries//2))
cursor.update()
cursor.remove()
# Check search_near operation
cursor.set_key(self.genkey(self.nentries))
self.session.begin_transaction()
self.session.prepare_transaction("prepare_timestamp=2a")
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda:cursor.search_near(), preparemsg)
self.session.timestamp_transaction("commit_timestamp=2b")
self.session.timestamp_transaction("durable_timestamp=2b")
self.session.commit_transaction()
# There is a bug with search_near operation when no key is set.
# This fix is being tracked in WT-3918.
if self.uri == 'lsm':
cursor.set_key(self.genkey(self.nentries))
cursor.search_near()
cursor.close()
if __name__ == '__main__':
wttest.run()
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