Commit 329dc1cb authored by Tim Peters's avatar Tim Peters

Checkpoint.

parent 47a521af
...@@ -195,11 +195,12 @@ First get the database back in an initial state. ...@@ -195,11 +195,12 @@ First get the database back in an initial state.
>>> r1["b"].value >>> r1["b"].value
0 0
>>> cn1.sync() >>> cn1.sync() # cn2 modified 'b', so cn1 should get a ghost for b
>>> r1["b"]._p_state >>> r1["b"]._p_state # -1 means GHOST
-1 -1
Closing the connection and commit a transaction should have the same effect. Closing the connection, committing a transaction, and aborting a transaction,
should all have the same effect on non-current objects in cache.
>>> def testit(): >>> def testit():
... cn1.sync() ... cn1.sync()
...@@ -211,6 +212,10 @@ Closing the connection and commit a transaction should have the same effect. ...@@ -211,6 +212,10 @@ Closing the connection and commit a transaction should have the same effect.
... cn2.getTransaction().commit() ... cn2.getTransaction().commit()
>>> testit() >>> testit()
>>> r1["b"]._p_state # 0 means UPTODATE, although note it's an older revision
0
>>> r1["b"].value
0
>>> r1["a"].value = 1 >>> r1["a"].value = 1
>>> cn1.getTransaction().commit() >>> cn1.getTransaction().commit()
>>> r1["b"]._p_state >>> r1["b"]._p_state
...@@ -225,20 +230,20 @@ reused by the next open() call (along with its object cache). ...@@ -225,20 +230,20 @@ reused by the next open() call (along with its object cache).
>>> cn3 = db.open() >>> cn3 = db.open()
>>> cn1 is cn3 >>> cn1 is cn3
True True
>>> cn1 = cn3
>>> r1 = cn1.root() >>> r1 = cn1.root()
It's not just that every object is a ghost. The root was in the Although "b" is a ghost in cn1 at this point (because closing a connection
cache, so our first reference to it doesn't return a ghost. has the same effect on non-current objects in the connection's cache as
committing a transaction), not every object is a ghost. The root was in
the cache and was current, so our first reference to it doesn't return
a ghost.
>>> r1._p_state >>> r1._p_state # UPTODATE
0 0
>>> r1["b"]._p_state >>> r1["b"]._p_state # GHOST
-1 -1
>>> cn1._transaction = None >>> cn1._transaction = None # See the Cleanup section below
(See the Cleanup section below.)
Late invalidation Late invalidation
----------------- -----------------
......
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