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27,211 Commits 1,607 Branches 185 Tags
8dd4697e48c04a405c9c8da4a68b948e45b1f159
Commit Graph

379 Commits

Author SHA1 Message Date
drh
daaae7b9d1 Update the mechanism used to keep track of what kind of syncing to do for 
WAL transaction commits and checkpoint operations.  Use the checkpoint-style
of syncing to sync the header of a new or restarted WAL file.

FossilOrigin-Name: bf65dae8d4297c57ac63228ccf0100f9fabf2fb600438c9f2e10a29c4b118168
 2017-08-25 01:14:43 +00:00
drh
9c6e07d2fa Fix an incorrect hyperlink in a comment. 
FossilOrigin-Name: 25292b9a4eb5efc7db551da0b3c9cfd7e79da1594ee14729de44090e188c2b2a
 2017-08-24 20:54:42 +00:00
drh
bc88711d08 Enclose the sqlite3WalSnapshotRecover() routine within 
FossilOrigin-Name: e7be3183eb25e0f9f04b9e251ff37fa5e50cc1a7
 2016-11-22 21:11:59 +00:00
dan
93f5113290 Remove the requirement to open the wal file before sqlite3_snapshot_recover() 
is called. Also add some comments to new functions.

FossilOrigin-Name: 28393c413cc4505b94411730e728583c5d4baaae
 2016-11-19 18:31:37 +00:00
dan
6a9e7f16eb Fix a problem causing sqlite3_snapshot_recover() to return 
SQLITE_IOERR_SHORT_READ.

FossilOrigin-Name: 525f75fa9fd4a95acc3fb3b0a01dabe2be39b383
 2016-11-19 16:35:53 +00:00
dan
5b4009f637 Fix a bug in sqlite3_snapshot_recover() that could cause subsequent read 
transactions to use out-of-data cache entries.

FossilOrigin-Name: 9abeb7980a34cec11a3420e14ad98a4ec0d9c599
 2016-11-19 14:53:22 +00:00
dan
1158498dce Add experimental sqlite3_snapshot_recover() API. 
FossilOrigin-Name: 174a6076a8d7bebe5efebf55f3fdc5d87c589cc7
 2016-11-18 20:49:43 +00:00
drh
ba6eb8769f Experimental changes toward making snapshots serializable. 
FossilOrigin-Name: b6a81fa1fc1fb78a65894129851a4ec3986640de
 2016-11-15 17:37:56 +00:00
dan
4a5bad572a Fix a problem with switching from wal to rollback mode when 
SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE is configured.

FossilOrigin-Name: 46e0016207b8e7df2ae6c7491fd0f3c2926eed21
 2016-11-11 17:08:51 +00:00
dan
298af02308 Add the SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE sqlite3_dbconfig() option - for 
disabling SQLite's default checkpoint-on-close behaviour.

FossilOrigin-Name: 093d2fc2288b75c15ccf877bfa0e622d3918a562
 2016-10-31 16:16:49 +00:00
dan
7fb8990688 Have wal file checkpoints exit early if the sqlite3_interrupt() API function is called. 
FossilOrigin-Name: 8a5f41c7b1718507524adef1a2730e99cf53270a
 2016-08-12 16:21:15 +00:00
dan
fe912510ea Fix an obscure problem with transactions written in "PRAGMA synchronous=full" mode on systems that do not support POWERSAFE_OVERWRITE causing an xSync() call to be omitted if the last frame written by a transaction is aligned to a sector boundary. This means that if a power failure or OS crash occurs very soon after such a transaction is committed, it may be lost following system recovery. 
FossilOrigin-Name: 37de3eab67f12ae1ce5bc8d5e541c64fc6b1fd80
 2016-05-24 16:20:51 +00:00
dan
ad2d5baf1f Add the sqlite3_snapshot_cmp() API. 
FossilOrigin-Name: c698a21af740ca1019c3a771fb83e569cd6bf23e
 2016-04-11 19:59:52 +00:00
drh
32c49904a6 Add the SQLITE_NOMEM_BKPT macro to enhance the ability to debug OOM errors. 
Only effective with compiling with SQLITE_DEBUG.

FossilOrigin-Name: 9b3454762d142113f5923d754ca6bd2edefbd362
 2016-02-15 18:15:15 +00:00
drh
8e0cea1a5d Make sure the codec is invoked when overwriting existing frames of the 
WAL file.  Yikes!

FossilOrigin-Name: f694e60a79024967a3f4574e3928f0b28589d381
 2016-02-15 15:06:47 +00:00
mistachkin
fad3039c51 Enhance ability to debug out-of-memory errors. 
FossilOrigin-Name: 6a9c4a3ebfb7cc0738ef6634440ccab44a21ff28
 2016-02-13 23:43:46 +00:00
drh
31a2313fa8 Add the SQLITE_FCNTL_JOURNAL_POINTER file control. 
FossilOrigin-Name: ad3daa5427672d2d236939ad3285b765f4601801
 2016-01-13 18:12:44 +00:00
drh
869aaf0941 Make sure all bytes of the WAL file are initialized even if the checksums are 
not being computed until commit due to WAL overwrite.

FossilOrigin-Name: 1f44a9bdc1577aed088d9b91882527228015dcd3
 2016-01-12 02:28:19 +00:00
drh
8997087a00 Improved testability. 
FossilOrigin-Name: e83d3a2a4e06665e8a056f63063bd6df03f063b9
 2016-01-11 00:52:32 +00:00
drh
b7c2f86b85 All WAL frame overwrites even if there are active savepoints. This is safe 
because a ROLLBACK TO will cause all reverted pages to be rewritten to the
WAL file prior to COMMIT.

FossilOrigin-Name: 99b31a6b491c1c51227f478d3713b020d37a17cf
 2016-01-09 23:55:47 +00:00
dan
c9a9022b21 If it is known that checksums will be recalculated on transaction commit, skip calculating checksums when appending frames to the wal file. When recalculating checksums, recalculate them starting with the first overwritten frame - not the first frame in the transaction. 
FossilOrigin-Name: 16b34f2537bbc7846d8e6dc2b35daae5af241c1b
 2016-01-09 18:57:35 +00:00
dan
d6f7c97952 If a single page is written to the wal file more than once, have each subsequent copy overwrite the original frame. 
FossilOrigin-Name: 5d113aef2c7d746e8eda88d4e36c04a39b0a11be
 2016-01-09 16:39:29 +00:00
drh
21d61853e7 Add the experimental SQLITE_FCNTL_JOURNAL_POINTER file control for obtaining 
the sqlite3_file pointer associated with a rollback journal or WAL file.

FossilOrigin-Name: a02ace9a746ff02fc1a5969bf13939b568624f93
 2016-01-08 02:27:01 +00:00
dan
0f308f5d47 Add a new assert() statement to the snapshot-specific part of sqlite3WalBeginReadTrans(). 
FossilOrigin-Name: d8a12023be32bdc6df18b0a5f38b917799854342
 2015-12-11 14:59:49 +00:00
drh
c49e960d41 Fix a variable type mismatch problem in the snapshot logic. 
FossilOrigin-Name: 93fb8010e4999b6b832d63a7c5a152f65d4415a3
 2015-12-11 03:16:54 +00:00
drh
71b62fa456 Fix a bad assert related to snapshots. 
FossilOrigin-Name: 767ee30efa5dd469e3a51d4e44cbe473061819b9
 2015-12-11 01:22:22 +00:00
drh
e230a8994e Snapshot documentation updates. Comment changes only - no changes to code. 
FossilOrigin-Name: ef51a398a04963508389ffe2f9d8359c1ec48261
 2015-12-10 22:48:22 +00:00
dan
a7aeb39836 Return SQLITE_BUSY (not SQLITE_BUSY_SNAPSHOT) if sqlite3_snapshot_open() fails to obtain the shared checkpointer lock. 
FossilOrigin-Name: 5343060bcc6c99029f731f8020d2cba3f405f207
 2015-12-10 19:11:34 +00:00
dan
3bf83ccd70 Have sqlite3_snapshot_open() avoid a race condition by taking a shared CHECKPOINTER lock while checking pInfo->nBackfillAttempted. 
FossilOrigin-Name: 8084eae0bc4f6513b1147fb890a6b2813f1c0a09
 2015-12-10 15:45:15 +00:00
mistachkin
c9fb38e7ad Fix spacing typo in comment. No changes to code. 
FossilOrigin-Name: 3a18526fc2253658dad84c5e600481c8a62efe40
 2015-12-10 03:16:47 +00:00
drh
998147ec38 Add the nBackfillAttempted field in formerly unused space in WalCkptInfo and 
use that field to close the race condition on opening a snapshot.

FossilOrigin-Name: cb68e9d0738fc7db7316947b4d2aab91aae819f2
 2015-12-10 02:15:03 +00:00
dan
65127cd57d Update sqlite3_snapshot_open() to reduce the chances of reading a corrupt snapshot created by a checkpointer process exiting unexpectedly. 
FossilOrigin-Name: 7315f7cbf4179aadda0f1a0baa1526a9b9f9729f
 2015-12-09 20:05:27 +00:00
dan
818b11aebb Add tests for snapshot_get(), _open() and _free(). 
FossilOrigin-Name: 502cc6f353358946080d9bcd335aed526825b88a
 2015-12-07 14:33:07 +00:00
dan
fc1acf33b8 Add untested implementations of experimental APIs sqlite3_snapshot_get(), _open() and _free(). 
FossilOrigin-Name: 0715eb00aa8891400cd50a15509d3d7b13789626
 2015-12-05 20:51:54 +00:00
drh
ab37277367 Remove more (dead) SQLITE_FCNTL_WAL_BLOCK logic from wal.c - code that was 
missed during the [e1d5320ca08933] check-in.

FossilOrigin-Name: 58c15c6af964563ac7ece8606d16730ccf9ee72b
 2015-12-02 16:10:16 +00:00
dan
5c472d0860 Fix an assert() enabled by SQLITE_ENABLE_EXPENSIVE_ASSERT in wal.c. 
FossilOrigin-Name: 8d2ed150a7a15626965cf994ef48c3ab61eca6ec
 2015-09-09 19:44:33 +00:00
dan
b8c7cfb834 When searching the wal file for a frame, do not search that part that was already checkpointed when the snapshot being read was at the head of the wal file. 
FossilOrigin-Name: 90760e72327eb0593cbfa6d7058b554198cd8044
 2015-08-13 20:23:46 +00:00
dan
6df003c7a5 Avoid reading frames that have already been checkpointed from the wal file. 
FossilOrigin-Name: 5669ac4a40429abc3f44540fc9d2f3b79b404bdf
 2015-08-12 19:42:08 +00:00
mistachkin
6b67a8ae03 Fix harmless compiler warning in MSVC 2015. 
FossilOrigin-Name: 01c8b9ccfa0f336dfead7c004de3de571753f707
 2015-07-21 19:22:35 +00:00
drh
f6bff3f5d6 Avoid a harmless compiler warning. 
FossilOrigin-Name: 2288842b8f191ff05a157db7f77af867bfa83c4f
 2015-07-17 01:16:10 +00:00
drh
f4fa0b8073 Fix some harmless compiler warnings. 
FossilOrigin-Name: 110cd84f5e842c4dcd9b9398cea211e25f36b3aa
 2015-07-15 18:35:54 +00:00
drh
f3cdcdccbe Use sqlite3_malloc64() in place of sqlite3_malloc() internally. 
FossilOrigin-Name: 48f553b05c05373c0af4b9c3a542979db3a2ee19
 2015-04-29 16:50:28 +00:00
dan
1fe0af200d Add a comment to wal.c to explain why a race condition is safe. 
FossilOrigin-Name: bc33af866403c23d548dd4705675315810d52d7f
 2015-04-13 17:43:43 +00:00
drh
bbf76eec34 Arrange for some of the transient locks in WAL mode to block, as a single 
to the OS to fix priority inversions.

FossilOrigin-Name: c6e6d5f4e06c3ac0bfb620c0c728fbc7230c4a02
 2015-03-10 20:22:35 +00:00
dan
976b003344 Ensure that "PRAGMA wal_checkpoint = TRUNCATE|FULL|RESTART" block on other connections and truncate the database file as required even if the entire wal file has already been checkpointed. 
FossilOrigin-Name: 53429689d4fcf472edbc89cc50b5e69ba3270634
 2015-01-29 19:12:12 +00:00
drh
622a53d54a Reinstate an assert() by adding an "|| CORRUPT_DB" term. 
FossilOrigin-Name: 95ce20348d9b868a0407adccdb222a0e4c762945
 2014-12-29 11:50:39 +00:00
drh
a25165fa68 Add an implementation mark and fix a comment describing the OP_Checkpoint 
opcode.

FossilOrigin-Name: 7475b90c558157802b036162376fceacc1b9ab4a
 2014-12-04 04:50:59 +00:00
drh
dd90d7ee81 Add evidence marks and assert()s used as evidence for checkpoint requirements. 
FossilOrigin-Name: b2da8afc7657266fbe8e683c6e50fe18216cbcf3
 2014-12-03 19:25:41 +00:00
dan
0fe8c1b967 When attempting to restart a wal file, make any required calls to sqlite3_randomness() before waiting on or checking for wal file readers. This restores the behaviour exhibited by the trunk. 
FossilOrigin-Name: 6ee08769f0ffbb3d620c66b89180ece7782dc820
 2014-12-02 19:35:09 +00:00
dan
f26a1549ac Add the SQLITE_CHECKPOINT_TRUNCATE option. 
FossilOrigin-Name: 8e20a43419e46b6b9d1f60ec7ea420bbfb3ef358
 2014-12-02 19:04:54 +00:00