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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.
+#
+# test_bug004.py
+# Regression tests.
+
+import wiredtiger, wttest
+from helper import key_populate, value_populate
+
+# Check to make sure we see the right versions of overflow keys and values
+# when they are deleted in reconciliation without having been instantiated
+# in the system.
+class test_bug004(wttest.WiredTigerTestCase):
+ # This is a btree layer test, test files, ignore tables.
+ uri = 'file:test_ovfl_key'
+
+ # Use a small page size because we want to create overflow items
+ config = 'allocation_size=512,' +\
+ 'leaf_page_max=512,value_format=S,key_format=S'
+
+ nentries = 30
+
+ def test_bug004(self):
+ # Create the object, fill with overflow keys and values.
+ self.session.create(self.uri, self.config)
+ c1 = self.session.open_cursor(self.uri, None)
+ for i in range(1, self.nentries):
+ c1[key_populate(c1, i) + 'abcdef' * 100] = \
+ value_populate(c1, i) + 'abcdef' * 100
+ c1.close()
+
+ # Verify the object, force it to disk, and verify the on-disk version.
+ self.session.verify(self.uri)
+ self.reopen_conn()
+ self.session.verify(self.uri)
+
+ # Create a new session and start a transaction to force the engine
+ # to access old versions of the key/value pairs.
+ tmp_session = self.conn.open_session(None)
+ tmp_session.begin_transaction("isolation=snapshot")
+
+ # Load the object and use truncate to delete a set of records. (I'm
+ # using truncate because it doesn't instantiate keys, all other ops
+ # currently do -- that's unlikely to change, but is a problem for the
+ # test going forward.)
+ c1 = self.session.open_cursor(self.uri, None)
+ c1.set_key(key_populate(c1, self.nentries - 5) + 'abcdef' * 100)
+ c2 = self.session.open_cursor(self.uri, None)
+ c2.set_key(key_populate(c2, self.nentries + 5) + 'abcdef' * 100)
+ self.session.truncate(None, c1, c2, None)
+ c1.close()
+ c2.close()
+
+ # Checkpoint, freeing overflow blocks.
+ self.session.checkpoint()
+
+ # Use the snapshot cursor to retrieve the old key/value pairs
+ c1 = tmp_session.open_cursor(self.uri, None)
+ c1.set_key(key_populate(c1, 1) + 'abcdef' * 100)
+ c1.search()
+ for i in range(2, self.nentries):
+ c1.next()
+ self.assertEquals(
+ c1.get_key(), key_populate(c1, i) + 'abcdef' * 100)
+ self.assertEquals(
+ c1.get_value(), value_populate(c1, i) + 'abcdef' * 100)
+
+
+if __name__ == '__main__':
+ wttest.run()