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18,808 Commits 1,608 Branches 185 Tags
43c4ac8bfecba96e4db6d075c5fa743a4fe25ea5
Commit Graph

1277 Commits

Author SHA1 Message Date
drh
a1f7c0a21c Enhance the sqlite3VdbeRecordCompare() routines so that if they encounter 
database corruption, they will set the UnpackedRecord.isCorrupt field and
return 0.  The sqlite3BtreeMovetoUnpacked() routine detects this and returns
SQLITE_CORRUPT, causing the corruption to be reported back to the top-level.

FossilOrigin-Name: 7fa85eaaaf6d211378620d728a759fdfe30a15b0
 2014-03-28 03:12:48 +00:00
drh
86dd3716b9 Detect when a VdbeCursor is still pointing at a valid row but that row has 
moved, and invalidated the return from prior sqlite3BtreeDataFetch() or
sqlite3BtreeKeyFetch() calls.

FossilOrigin-Name: e6798871ce94961135762669af418cd78540c121
 2014-03-25 11:00:21 +00:00
dan
9bc21b535e Only use the direct-overflow-read optimization if all data from the overflow page in question is being read. 
FossilOrigin-Name: d8e1f75ddf10f3c0b21acd5455f90fdcea54a948
 2014-03-20 18:56:35 +00:00
drh
079a307259 First attempt at getting block-sort to work. This is an incremental check-in. 
There are many problems still to be worked out.

FossilOrigin-Name: 59742dd4c5259883850044d0938248b009ebd045
 2014-03-19 14:10:55 +00:00
drh
18c7e40ca3 Fix a harmless compiler warning that crops up with SQLITE_MAX_MMAP_SIZE=0. 
FossilOrigin-Name: 1277932b7e8bb36c7070ffafbf110a8e128c267b
 2014-03-14 11:46:10 +00:00
drh
926345e027 Remove a stray C99-style comment. 
FossilOrigin-Name: f500e87d6ec6fa43c13f4e94edf32789f36e4233
 2014-03-11 23:44:10 +00:00
drh
036dbec01c Combine the various boolean fields of the BtCursor object into a single 
bit-vector.  This allows setting or clearing more than one boolean at a
time and makes the overflow-pgno-cache branch faster than trunk on 
speedtest1.

FossilOrigin-Name: 968fec44d7fde3adbd3e9603e4282351f0d4bda1
 2014-03-11 23:40:44 +00:00
dan
5a500afd57 Enable the b-tree cursor objects overflow page-number cache, which is normally enabled only for incr-blob cursors, for all cursors. 
FossilOrigin-Name: da59198505990a4fe832be7932117c7e014955b7
 2014-03-11 20:33:04 +00:00
drh
b6e8fd105c Fix some incorrect comments and typos in comments. Add testcase() macros 
to some of the new record comparison code.

FossilOrigin-Name: b83cfe899d84fe9d61540e9984321ca30401638c
 2014-03-06 01:56:33 +00:00
dan
a4660bd695 Ensure that BtreeMovetoUnpacked() does not try to invoke xRecordCompare when it is set to NULL. 
FossilOrigin-Name: 2879234b7c373be422af3fe180cae9840943e29a
 2014-03-04 16:05:25 +00:00
drh
13a747e5e4 Fix a couple of harmless compiler warnings. 
FossilOrigin-Name: fcf480cc630976b619aabd5f7fb7b09601a178fb
 2014-03-03 21:46:55 +00:00
dan
3833e934d3 Remove the vdbeRecordCompareLargeHeader function. Fix some other details. 
FossilOrigin-Name: 3861e853105cb8da344c7eebd2e455622b26395e
 2014-03-01 19:44:56 +00:00
dan
3b9330f83c Further changes to sqlite3VdbeRecordCompare(). 
FossilOrigin-Name: 570893740067a7caa952f259fa078cdf67017d71
 2014-02-27 20:44:18 +00:00
dan
1fed5dab0d Attempt to speed up sqlite3VdbeRecordCompare() by various means. This code is in an interim state. 
FossilOrigin-Name: 85206e0bbac29adab52bef795f6d1479f2ae2c0e
 2014-02-25 21:01:25 +00:00
drh
fe48599294 Minor simplifications to the "zeroPage()" routine in btree.c. 
FossilOrigin-Name: cc8f10bcb206c9def69b06f26decf025b8d9119d
 2014-02-12 23:52:16 +00:00
drh
e0670b6220 Remove the "rowid cache" that sought to remember the largest rowid for a 
table and thereby speed up OP_NewRowid.  That cache was ineffective.
Removing it results in a performance increase of 0.4%, less memory usage,
and a slightly smaller library size.

FossilOrigin-Name: 56bc5ce8958c8e6250531b4052b905d7ac993db3
 2014-02-12 21:31:12 +00:00
drh
e39a732ce2 Provide hints to the btree layer Next and Previous primitives to let them 
know if they can be no-ops if the underlying index is unique.

FossilOrigin-Name: 6c643e45c274e755dc5a1a65673df79261c774be
 2014-02-03 14:04:11 +00:00
dan
7df42aba12 Handle a few obscure problems that could manifest if a database corrupted in a certain way was written by a connection in the middle of a SELECT statement on the same db. 
FossilOrigin-Name: eba8a564e62f84a9620008beead80081fe90a1b7
 2014-01-20 18:25:44 +00:00
dan
8ce7184bc2 Add code to handle recursive CTEs. 
FossilOrigin-Name: a5c2a54a07d35166911abc792008c05dea897742
 2014-01-14 20:14:09 +00:00
drh
da8a330a03 Create and use a new pager interface sqlite3PagerUnrefNotNull() that works 
just like sqlite3PagerUnref() but guarantees that its argument is not a
NULL pointer.

FossilOrigin-Name: e00f37e2333cac5b53e17cf764ab56c4fcd5f617
 2013-12-13 19:35:21 +00:00
drh
2a8d2261ed Simplify the sqlite3BtreeKeyFetch() and sqlite3BtreeDataFetch() interfaces 
to the storage engine.

FossilOrigin-Name: bf97598592ff60fab2a06d8b31b0201200b91684
 2013-12-09 20:43:22 +00:00
drh
a6353a3f64 Performance optimizations for sqlite3VXPrintf(). 
FossilOrigin-Name: 9227ad48e1612b32a3a3e9551c49890f93abc0a7
 2013-12-09 19:03:26 +00:00
drh
8f518837f9 Use memmove() rather than a home-made copy loop in insertCell() too. 
FossilOrigin-Name: a3d796b1673ca68ced247d63c22ddcfb1f9d56ea
 2013-12-09 02:32:19 +00:00
drh
9bb7c4ff4f Use memmove() rather than a home-made copy loop in dropCell() of btree.c, 
for a size reduction and performance improvement.

FossilOrigin-Name: 78e1706804e88a0dd5dc40bee838a3a504cfa53b
 2013-12-09 01:58:11 +00:00
drh
29f2bad6f0 Avoid unnecessary no-op calls from getAndInitPage() to btreeInitPage() 
in the btree.c logic.

FossilOrigin-Name: 81f5ae13b2e23daee03151d32515387b7f5ba5e5
 2013-12-09 01:04:54 +00:00
drh
7599d4aa44 Use putVarint32() instead of putVarint() for a quantity that can never 
exceed 2GiB - 1.

FossilOrigin-Name: 6996fb34445adedf463b66ed1f339ee1f27ce6e5
 2013-12-09 00:47:11 +00:00
drh
28935364ef If the SQLITE_ENABLE_CURSOR_HINTS macro is defined, then invoke the 
sqlite3BtreeCursorHint() interface to provide hints to the storage engine
about rows that need not be returned.  Hints can be disabled using
SQLITE_TESTCTRL_OPTIMIZATIONS with SQLITE_CursorHints (0x2000).  Cursor
hints are not used by the built-in storage engine of SQLite but might
be useful to applications that provide their own storage engine.  The
current code is work-in-progrss and contains bugs.

FossilOrigin-Name: 3a9bec524ef2de44028b4058e67dc962082888d3
 2013-12-07 20:39:19 +00:00
drh
4e8fe3ff91 Performance optimization to the moveToRoot() subroutine in btree.c. 
FossilOrigin-Name: b5842a70f8e26456a8f0d39539bc266f097480a4
 2013-12-06 23:25:27 +00:00
drh
72b8ef6ce3 Remove some commented-out code from sqlite3BtreeMovetoUnpacked() to try to make 
it more readable.

FossilOrigin-Name: 2d62d1131f8bbc4e1f8f7aeaf0d91e3237fe3b7c
 2013-12-06 22:44:51 +00:00
drh
094b7587fc Detect a corrupt UnpackedRecord and return SQLITE_CORRUPT prior to calling 
sqlite3BtreeMovetoUnpacked().

FossilOrigin-Name: 55ec474db8935ef36fae30da5d11f5701c60c088
 2013-11-30 12:49:28 +00:00
drh
d16546da78 Remove a NEVER() from a branch that is now reachable during OOM faults. 
FossilOrigin-Name: 18bdcb05c26860643f53a6b9e85f84109a3ebe5a
 2013-11-25 21:41:24 +00:00
drh
9b2fc61d25 Return an SQLITE_CORRUPT error if the content size field of a table record 
extends off the end of a page.

FossilOrigin-Name: b48c4e402125fb8d2208d358f6e9bbc351f3a49d
 2013-11-25 20:14:13 +00:00
drh
ebf10b1fb4 Uses shifts rather than division for arithmetic on the cell indices, since 
those indices are always non-negative.

FossilOrigin-Name: 5bf2a3feeb2c83671bf3edeb20a549239e6873bf
 2013-11-25 17:38:26 +00:00
drh
17566ee243 Optimize the skipping of the payload size field when doing a binary search 
for a rowid.

FossilOrigin-Name: 55e5bfa231dd52a7cf9ec982967da4963867b9e5
 2013-11-25 16:52:59 +00:00
drh
d2022b0118 Arrange for sqlite3BtreeMovetoUnpacked() to always leave the cursor cell 
parse cache invalidated.  This fixes issues with previous check-ins on this
branch and also runs faster.

FossilOrigin-Name: a74675607fe041e37a58a3ec287131de0e5090c3
 2013-11-25 16:23:52 +00:00
drh
bb933ef6e7 More optimizations to sqlite3BtreeMovetoUnpacked(). But there are failures 
in TH3.  Committing this intermediate state to facilitate bisecting.

FossilOrigin-Name: f80497be446f84d2000e454e32d717887a7d0cee
 2013-11-25 15:01:38 +00:00
drh
d793f44723 More improvements to sqlite3BtreeMovetoUnpacked() performance. 
FossilOrigin-Name: 88680698231b7141401f7166e3aff8dbc6008030
 2013-11-25 14:10:15 +00:00
drh
ec3e6b10f4 Performance improvements in sqlite3BtreeMovetoUnpacked(). 
FossilOrigin-Name: d0fb7acea7cbfe6f2d84782a28bb51675a06576f
 2013-11-25 02:38:55 +00:00
drh
501932ca68 Changes some offset and amount parameters from "int" to "u32" to avoid 
harmless signed/unsigned comparison warnings.

FossilOrigin-Name: 4e8c5d0795cb7c603182bfa70f3855d654f0997e
 2013-11-21 21:59:53 +00:00
drh
b41392241e Allocate extra stack space for UnpackedRecord objects, reducing the need 
to malloc for them as often, and thereby get a performance improvement.

FossilOrigin-Name: a725a75f870d7d9b21946fbcc71a956492986ab0
 2013-11-06 14:36:08 +00:00
dan
14285b7067 Clear a valgrind error by zeroing the first 4 bytes of the temp-space allocation used by the b-tree module. 
FossilOrigin-Name: 8651aba1865a8f82d21d3345f33fbd239fd9a042
 2013-10-16 11:39:07 +00:00
drh
793eb043ce Remove an incorrect debugging assert() that was accidently added during the 
STAT4 enhancement.

FossilOrigin-Name: 2bb7f74bbd467b74581699d16b06758f9c9457dc
 2013-10-06 22:52:51 +00:00
dan
56c517aa5f Fix a faulty assert() in sqlite3BtreeBeginTrans() that may fail in shared-cache mode. 
FossilOrigin-Name: 1e1321ee985370c2b7e5bd64286bb4d7704b5a30
 2013-09-26 11:04:33 +00:00
drh
2f53b90665 Merge the STAT4 capability into trunk. 
FossilOrigin-Name: a32af0abe5fa6d570604fa3534e8230d5b6042fc
 2013-08-26 23:18:06 +00:00
drh
b00fc3b14e Simplify the btreeGetPage() routine so that it uses a single flag parameter 
in place of two boolean parameters.

FossilOrigin-Name: 617e23ec283d3147fc3fd29c474ccedf4915cdc7
 2013-08-21 23:42:32 +00:00
drh
b49bc86a1a Simplification to the StrAccum object and the sqlite3StrAccumAppend() 
method that also results in slightly better performance.

FossilOrigin-Name: 700dbbea8647e0fdaee6d0aba3d3dd8ebfbac04a
 2013-08-21 21:12:10 +00:00
drh
13c77bf86b Performance enhancement in btreeParseCellPtr(). 
FossilOrigin-Name: a17190a2296e8cd5e59524ff5914fc5ea3560697
 2013-08-21 15:52:22 +00:00
drh
9b47ee3f09 Performance optimizations in the VDBE and especially to the OP_Next and 
related opcodes and in the sqlite3BtreeNext() and sqlite3BtreePrevious()
routines.  This is a cherrypick of [6f99b54aedeb], [d2efea1682a7], and
[d78c5d89de4b].

FossilOrigin-Name: 7f72fc4f47445a2c01910b268335873de9f75059
 2013-08-20 03:13:51 +00:00
drh
f66f26a311 Performance improvement in sqlite3BtreeNext() and sqlite3BtreePrevious() 
for the common case of a valid cursor.

FossilOrigin-Name: dc65ad8c4c67b21e3b042b8df6580d02b634a90b
 2013-08-19 20:04:10 +00:00
drh
40c3941cfa Add the cache_spill pragma. 
FossilOrigin-Name: cdb181c04fa99c6c29f23eb68ccb5475e7f6bf9c
 2013-08-16 20:42:20 +00:00