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#!/usr/bin/env python
#
# Public Domain 2014-2016 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 helper import complex_populate, simple_populate
from helper import key_populate, value_populate
from wtscenario import check_scenarios, multiply_scenarios, number_scenarios
# test_cursor_random.py
# Cursor next_random operations
class test_cursor_random(wttest.WiredTigerTestCase):
types = [
('file', dict(type='file:random')),
('table', dict(type='table:random'))
]
config = [
('sample', dict(config='next_random=true,next_random_sample_size=35')),
('not-sample', dict(config='next_random=true'))
]
scenarios =number_scenarios(multiply_scenarios('.', types, config))
# Check that opening a random cursor on a row-store returns not-supported
# for methods other than next, reconfigure and reset, and next returns
# not-found.
def test_cursor_random(self):
uri = self.type
self.session.create(uri, 'key_format=S,value_format=S')
cursor = self.session.open_cursor(uri, None, self.config)
msg = "/Unsupported cursor/"
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, lambda: cursor.compare(cursor), msg)
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, lambda: cursor.insert(), msg)
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, lambda: cursor.prev(), msg)
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, lambda: cursor.remove(), msg)
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, lambda: cursor.search(), msg)
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, lambda: cursor.search_near(), msg)
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, lambda: cursor.update(), msg)
self.assertTrue(cursor.next(), wiredtiger.WT_NOTFOUND)
self.assertEquals(cursor.reconfigure(), 0)
self.assertEquals(cursor.reset(), 0)
cursor.close()
# Check that next_random works with a single value, repeatedly.
def test_cursor_random_single_record(self):
uri = self.type
self.session.create(uri, 'key_format=S,value_format=S')
cursor = self.session.open_cursor(uri, None)
cursor['AAA'] = 'BBB'
cursor.close()
cursor = self.session.open_cursor(uri, None, self.config)
for i in range(1,5):
self.assertEquals(cursor.next(), 0)
self.assertEquals(cursor.get_key(), 'AAA')
cursor.close
# Check that next_random works in the presence of a larger set of values,
# where the values are in an insert list.
def test_cursor_random_multiple_insert_records(self):
uri = self.type
if uri.startswith('file:'):
simple_populate(self, uri,
'allocation_size=512,leaf_page_max=512,key_format=S', 100)
else:
complex_populate(self, uri,
'allocation_size=512,leaf_page_max=512,key_format=S', 100)
# In a insert list, next_random always selects the middle key/value
# pair, all we can do is confirm cursor.next works.
cursor = self.session.open_cursor(uri, None, self.config)
self.assertEqual(cursor.next(), 0)
# Check that next_random works in the presence of a larger set of values,
# where the values are in a disk format page.
def cursor_random_multiple_page_records(self, reopen):
uri = self.type
if uri.startswith('file:'):
simple_populate(self, uri,
'allocation_size=512,leaf_page_max=512,key_format=S', 10000)
else:
complex_populate(self, uri,
'allocation_size=512,leaf_page_max=512,key_format=S', 10000)
# Optionally close the connection so everything is forced to disk,
# insert lists are an entirely different path in the code.
if reopen:
self.reopen_conn()
cursor = self.session.open_cursor(uri, None, self.config)
last = ''
match = 0
for i in range(1,10):
self.assertEqual(cursor.next(), 0)
current = cursor.get_key()
if current == last:
match += 1
last = current
self.assertLess(match, 5,
'next_random did not return random records, too many matches found')
def test_cursor_random_multiple_page_records_reopen(self):
self.cursor_random_multiple_page_records(1)
def test_cursor_random_multiple_page_records(self):
self.cursor_random_multiple_page_records(0)
# Check that opening a random cursor on column-store returns not-supported.
class test_cursor_random_column(wttest.WiredTigerTestCase):
scenarios = check_scenarios([
('file', dict(uri='file:random')),
('table', dict(uri='table:random'))
])
def test_cursor_random_column(self):
self.session.create(self.uri, 'key_format=r,value_format=S')
msg = '/next_random .* not supported/'
self.assertRaisesWithMessage(wiredtiger.WiredTigerError, lambda:
self.session.open_cursor(self.uri, None, "next_random=true"), msg)
# Check next_random works in the presence a set of updates, some or all of
# which are invisible to the cursor.
class test_cursor_random_invisible(wttest.WiredTigerTestCase):
types = [
('file', dict(type='file:random')),
('table', dict(type='table:random'))
]
config = [
('sample', dict(config='next_random=true,next_random_sample_size=35')),
('not-sample', dict(config='next_random=true'))
]
scenarios =number_scenarios(multiply_scenarios('.', types, config))
def test_cursor_random_invisible_all(self):
uri = self.type
self.session.create(uri, 'key_format=S,value_format=S')
cursor = self.session.open_cursor(uri, None)
# Start a transaction.
self.session.begin_transaction()
for i in range(1, 100):
cursor[key_populate(cursor, i)] = value_populate(cursor, i)
# Open another session, the updates won't yet be visible, we shouldn't
# find anything at all.
s = self.conn.open_session()
cursor = s.open_cursor(uri, None, self.config)
self.assertEqual(cursor.next(), wiredtiger.WT_NOTFOUND)
def test_cursor_random_invisible_after(self):
uri = self.type
self.session.create(uri, 'key_format=S,value_format=S')
cursor = self.session.open_cursor(uri, None)
# Insert a single leading record.
cursor[key_populate(cursor, 1)] = value_populate(cursor, 1)
# Start a transaction.
self.session.begin_transaction()
for i in range(2, 100):
cursor[key_populate(cursor, i)] = value_populate(cursor, i)
# Open another session, the updates won't yet be visible, we should
# return the only possible record.
s = self.conn.open_session()
cursor = s.open_cursor(uri, None, self.config)
self.assertEquals(cursor.next(), 0)
self.assertEqual(cursor.get_key(), key_populate(cursor, 1))
def test_cursor_random_invisible_before(self):
uri = self.type
self.session.create(uri, 'key_format=S,value_format=S')
cursor = self.session.open_cursor(uri, None)
# Insert a single leading record.
cursor[key_populate(cursor, 99)] = value_populate(cursor, 99)
# Start a transaction.
self.session.begin_transaction()
for i in range(2, 100):
cursor[key_populate(cursor, i)] = value_populate(cursor, i)
# Open another session, the updates won't yet be visible, we should
# return the only possible record.
s = self.conn.open_session()
cursor = s.open_cursor(uri, None, self.config)
self.assertEquals(cursor.next(), 0)
self.assertEqual(cursor.get_key(), key_populate(cursor, 99))
if __name__ == '__main__':
wttest.run()
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