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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, time
def timestamp_str(t):
return '%x' % t
# test_hs12.py
# Verify we can correctly append modifies to the end of string values
class test_hs12(wttest.WiredTigerTestCase):
conn_config = 'cache_size=2MB,statistics=(all),eviction=(threads_max=1)'
session_config = 'isolation=snapshot'
def test_modify_append_to_string(self):
uri = "table:test_reverse_modify01_notimestamp"
create_params = 'value_format=S,key_format=i'
value1 = 'abcedfghijklmnopqrstuvwxyz' * 5
value2 = 'b' * 100
valuebig = 'e' * 1000
self.session.create(uri, create_params)
cursor = self.session.open_cursor(uri)
session2 = self.setUpSessionOpen(self.conn)
session2.create(uri, create_params)
cursor2 = session2.open_cursor(uri)
# Insert a full value.
self.session.begin_transaction()
cursor[1] = value1
cursor[2] = value1
self.session.commit_transaction()
# Insert a modify
self.session.begin_transaction()
cursor.set_key(1)
cursor.modify([wiredtiger.Modify('A', 130, 0)])
cursor.set_key(2)
cursor.modify([wiredtiger.Modify('AB', 0, 0)])
self.session.commit_transaction()
# Validate that we do see the correct value.
session2.begin_transaction()
cursor2.set_key(1)
cursor2.search()
self.assertEquals(cursor2.get_value(), value1 + 'A')
cursor2.set_key(2)
cursor2.search()
self.assertEquals(cursor2.get_value(), 'AB' + value1)
session2.commit_transaction()
# Begin transaction on session 2 so it sees the current snap_min and snap_max
session2.begin_transaction()
# reset the cursor
cursor2.reset()
# Insert one more value
self.session.begin_transaction()
cursor.set_key(1)
cursor[1] = value2
self.session.commit_transaction()
# Insert a whole bunch of data into the table to force wiredtiger to evict data
# from the previous table.
self.session.begin_transaction()
for i in range(2, 10000):
cursor[i] = valuebig
self.session.commit_transaction()
# Try to find the value we saw earlier
cursor2.set_key(1)
cursor2.search()
self.assertEquals(cursor2.get_value(), value1 + 'A')
cursor2.set_key(2)
cursor2.search()
self.assertEquals(cursor2.get_value(), 'AB' + value1)
if __name__ == '__main__':
wttest.run()
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