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20,306 Commits 1,608 Branches 185 Tags
e22976c5357fb6501cb0dd40220b8d48bd9295bb
Commit Graph

1354 Commits

Author SHA1 Message Date
drh
13835c41e8 Fix a bug in the sqlite3TripAllCursors() routine that prevents it from 
reporting errors.  It is unknown at this time whether or not this omission can
result in any incorrect result in an actual query.

FossilOrigin-Name: 42588207ff5451cb785c394633e1ab631fb82f01
 2014-11-17 15:32:47 +00:00
drh
6f9c5669e2 When a transaction or savepoint rollback occurs, save the positions of all open read-cursors so that they can be restored following the rollback operation. Cherry-pick of check-in [dd03a2802f3f27] 
FossilOrigin-Name: 402780a9c8df9e7ea898bdca49c1191042fe387a
 2014-11-13 13:42:39 +00:00
dan
8023104252 When a transaction or savepoint rollback occurs, save the positions of all open read-cursors so that they can be restored following the rollback operation. 
FossilOrigin-Name: dd03a2802f3f276525f3cef9a93f825dd8606626
 2014-11-12 14:56:02 +00:00
drh
85fabf1444 This is a cherry-pick of version [b5df5ac052]. 
FossilOrigin-Name: d4b2d5d066891e06f2bf4337902b44b000fa9fd2
 2014-11-11 22:55:26 +00:00
drh
47b7fc7843 Experimental changes that permit read operations to continue after a 
ROLLBACK, as long as the schema is unchanged.

FossilOrigin-Name: fa6e6a9ae276cad60e9a4abc1bc23cf2809ea786
 2014-11-11 01:33:57 +00:00
drh
fefa094921 Fix harmless compiler warnings in the new balance_nonroot() routine. 
FossilOrigin-Name: 83a1e5db926b3a6d40f4a5cf9a8e6852b9bac9ac
 2014-11-05 21:21:08 +00:00
drh
cbd55b0362 Change the definition of SQLITE_CONFIG_SCRATCH so that at most one scratch 
buffer is used per thread.  Use the generic heap memory allocator for the
WalIterator object when running a checkpoint.

FossilOrigin-Name: 391c9b85abcb5ba300fb2e116384639310c69ed2
 2014-11-04 14:22:27 +00:00
drh
5279d3433c Improved documentation and addition of source-code evidence marks for the 
sqlite3_config() interface.

FossilOrigin-Name: 681031a436fdd4cce426d6cd43cbae6b83167d26
 2014-11-04 13:41:32 +00:00
drh
def6889d21 Add the SQLITE_CONFIG_PCACHE_HDRSZ option for sqlite3_config(). 
FossilOrigin-Name: 6eb03e62a34e8e0964175283587247b0212db604
 2014-11-04 12:11:23 +00:00
drh
d836d42383 Simplify the logic in the cell redistribution loop of balance_nonroot(). 
Enhance and clarify comments and add assert() statements for additional
verification of correctness.

FossilOrigin-Name: a07078b60007e88adea67bec5f0caf91f707ad78
 2014-10-31 14:26:36 +00:00
drh
bec021b9fc Simplify the math slightly, and reduce by one the number of loop iterations, 
for the loop in balance_nonroot() that moves cells between pages.

FossilOrigin-Name: 2e838db82e533598b3cb00011c04fc0d5a896895
 2014-10-31 12:22:00 +00:00
drh
768f29002e Remove an unnecessary branch from balance_nonroot(). 
FossilOrigin-Name: 9fc7c88e3f5221883aa6eafbf8af3be94db0c299
 2014-10-31 02:51:41 +00:00
drh
00fe08af82 In the balance_nonroot() routine, protect the values in aPgno[] array from 
change during the page sort, so that aPgno[] can be used to avoid unnecessary
pointer-map updates for auto_vacuum databases.

FossilOrigin-Name: 69c3924fe834a78d4a8d86833626bf5f68e33a3a
 2014-10-31 00:05:23 +00:00
drh
2a0df92542 Improvements to the wording of some comments. Reinstate an assert() that 
is only true for non-corrupt database files by adding an "|| CORRUPT_DB" term.

FossilOrigin-Name: 67adb44838f98805f86aecca634d9a3b07370b9e
 2014-10-30 23:14:56 +00:00
drh
ba0f999418 Tweaks to comments in btree.c. Minor code changes to enhance testability. 
FossilOrigin-Name: c7d9aa3a1ce63e27ec94295601bc89fecf1e4977
 2014-10-30 20:48:44 +00:00
drh
eefaf448db Correct the documentation on the maximum size of a scratch allocation. 
FossilOrigin-Name: 30f86eb3f9ac88f83ed9e23ea6cd1fccf68e0812
 2014-10-28 00:56:18 +00:00
mistachkin
a95d8ca1fa Fix harmless compiler warning in an assert statement. 
FossilOrigin-Name: d33a1ff3aad0bfabf70a98ac338a68f82074e4fe
 2014-10-27 19:42:02 +00:00
drh
8a42d1bba1 Fix an unused variable in btree.c:allocateSpace(). 
FossilOrigin-Name: 637246165a14c4808b90d0437e4d43fa5fac659e
 2014-10-27 18:21:01 +00:00
dan
61e94c9deb If a free-slot is found within a page, but using that free-slot would fragment the page further and there are already at least 60 fragmented bytes, degragment the page. This matches the behaviour of the trunk. 
FossilOrigin-Name: 1f80f8c136ac970dcc7fb2337263dc5922e348c3
 2014-10-27 08:02:16 +00:00
dan
89ca0b3878 Further modifications to new code to better handle corrupt databases. 
FossilOrigin-Name: 1a8cf0a043347772ac54d150d634c32845beee8b
 2014-10-25 20:36:28 +00:00
dan
31f4e99d44 Ensure that the "Any prior cache entry associated with newKey is guaranteed not to be pinned" guarantee made to xRekey implementations is not violated. 
FossilOrigin-Name: ecc3544e712041736af7c7b4f34864a1f2e30ff7
 2014-10-24 20:57:03 +00:00
dan
23eba45d23 Fix some issues in the new code on this branch related to the handling of corrupt databases. 
FossilOrigin-Name: 19736dd9fbbb7e252c4f8715e2277d48ac41f5bc
 2014-10-24 18:43:57 +00:00
dan
e6593d8e8c Fix some minor formatting and code organization issues. 
FossilOrigin-Name: eab8706dc47aa0a44caf73619de858397c3e0b4e
 2014-10-24 16:40:49 +00:00
dan
cc8490d2cd Merge latest trunk with this branch. 
FossilOrigin-Name: 854a54c6c21e800b0cd999023014813f7c50b23f
 2014-10-22 18:42:31 +00:00
drh
92787cf042 Add a four-byte prefix to the BtShared.pTmpSpace buffer to avoid reading 
before the beginning of an allocation.

FossilOrigin-Name: 9386bfca128023583a24303e5f1d832987a49d43
 2014-10-15 11:55:51 +00:00
dan
8e9ba0c335 Fix some code duplication issues on this branch. Add minor optimizations to the new code. 
FossilOrigin-Name: 58d7793bd5d608ba9fc3a2cd44b9d9512e0332ba
 2014-10-14 17:27:04 +00:00
dan
d0b8f93b5f Merge trunk changes into this branch. 
FossilOrigin-Name: d5b7c5a88dd58de85b3060a1f28b6d96e6e21207
 2014-10-13 18:09:13 +00:00
dan
d7b545bbcb Further work on balance_nonroot(). 
FossilOrigin-Name: 6594f9b420e2fa642737722ff8521f756ecef227
 2014-10-13 18:03:27 +00:00
drh
c22284f4b3 Reduce the CPU load imposed by sqlit3VdbeCursorMoveto() by factoring out 
some of its functions and by avoiding unnecessary calls.

FossilOrigin-Name: c2799aece17d347c64217a0e407bb10e50c184a3
 2014-10-13 16:02:20 +00:00
dan
09c6840153 Attempt to further reduce memcpy() in balance_nonroot(). 
FossilOrigin-Name: fec849dcca3aead2bc2d4ecffeda750684d32fb0
 2014-10-11 20:00:24 +00:00
drh
d6176c4131 Simplification to the insertCell() routine in btree.c, resulting in a 
performance boost and a very small size decrease.  It turns out that the
extra work involved in sometimes avoiding an memcpy() of the first four bytes
of a record takes more time than just unconditionally copying those
four bytes.

FossilOrigin-Name: 66de15580d3c289601e67debfe1edee286f4db5f
 2014-10-11 17:22:55 +00:00
dan
33ea486603 Change the balance_nonroot() routine to reduce the amount of memcpy work that takes place. This is a work in progress. 
FossilOrigin-Name: 29304499ea4b72dbb6701e10cc19b5d41f7e5ac9
 2014-10-09 19:35:37 +00:00
dan
9501a64516 Avoid ever writing before the start of an allocated buffer in the DIRECT_OVERFLOW_READ code. Fix for [e3a290961a6]. 
FossilOrigin-Name: c3c15d20c6913811956a5041c959a56ca4eeb5eb
 2014-10-01 12:01:10 +00:00
drh
7682a476f6 Ensure that the OP_Prev opcode verifies that content has not been deleted 
out from under the cursor.  Fix for ticket [209d31e3161b9e9ff].

FossilOrigin-Name: 414f0d6a647a4d040b5463c73c5e15e699d85b4c
 2014-09-29 15:00:28 +00:00
drh
588400b861 Reduce the amount of memcpy() required by defragmentPage(). 
FossilOrigin-Name: 3edab9957cc7bb90b52fd40b02613c2cb03fc166
 2014-09-27 05:00:25 +00:00
drh
867db83159 Fix the "PRAGMA integrity_check" command so that it avoids formatting error 
message context messages until it actually needs to generate an error message.
This avoids much formatting, and hence greatly improves the performance of
"PRAGMA integrity_check" in the common case when there are no errors.  It also
makes the code a little smaller.

FossilOrigin-Name: 83913515830aa850f9e38406f9422d7e88dcab66
 2014-09-26 02:41:05 +00:00
drh
3fbb022b98 Have each open database allocate its pTmpSpace when the first write cursor 
is opened, rather than on each insert or delete, for a small space savings
and performance boost.

FossilOrigin-Name: 99323552c001bc9173eb2a44542234c8ef7a9845
 2014-09-24 19:47:27 +00:00
drh
b2325b72df Small performance and size optimization for btreeUnlockIfUnused(). 
FossilOrigin-Name: 13c746f85d254475b10c3dd58555acd3bbead0ce
 2014-09-24 18:31:07 +00:00
drh
9bfdc25062 Have the clearCell() routine return the cell size to the caller, rather 
than have the caller make a separate call to cellSizePtr().

FossilOrigin-Name: f21d217583c205dc17f98bb4877fd4ed98cefcb1
 2014-09-24 02:05:41 +00:00
drh
3f3874030c Shorten all lines of source code in btree.c to at most 80 characters. 
No logical changes.

FossilOrigin-Name: 5dd41cdbfebdd088ebd9a90a394ee296c207ad90
 2014-09-24 01:23:00 +00:00
drh
3e28ff5cb5 Add the MemPage.noPayload boolean and use it to help 
cellSizePtr() and btreeParseCellPtr() run faster.

FossilOrigin-Name: 8e3375313ebbf26b68561f3ed31d2a488222e5d0
 2014-09-24 00:59:08 +00:00
drh
c46838309c Remove an unused C-preprocessor macro. No functional changes to the code. 
FossilOrigin-Name: f480582ccae0e9a917d4523191025bd16016ba64
 2014-09-23 23:12:53 +00:00
drh
6200c88123 Avoid calling btreeParseCellPtr() from within fillInCell() since most of 
what btreeParseCellPtr() computes is ignored by fillInCell().  Instead, have
fillInCell() compute the values it needs inline.  Performance improvement.

FossilOrigin-Name: 4147f6671e3faa8ddffab8387a6c7d9b5b962fc8
 2014-09-23 22:36:25 +00:00
drh
ab1cc58b70 Simplify the CellInfo structure for a size reduction and performance 
improvement.

FossilOrigin-Name: bf59df66b3613c38cfb13a68091b8328ebb22c78
 2014-09-23 21:25:19 +00:00
drh
a4bb5b0726 Fix to payload size overflow detection in the cellSizePtr() change of 
the previous check-in.

FossilOrigin-Name: 7609744014c6a84a8379794a0351a2e9626ec86b
 2014-09-22 20:38:10 +00:00
drh
dc41d60aaa Size reduction and substantial performance increase for cellSizePtr(). 
FossilOrigin-Name: bc8bbf3207288d160287519c3b7123997996b440
 2014-09-22 19:51:35 +00:00
drh
75179ded97 Reduce the number of arguments to RecordCompare functions from 4 to 3, 
resulting in a small performance increase.

FossilOrigin-Name: 8239c35aedd583af79505378bb7dbb78346a3f45
 2014-09-16 14:37:35 +00:00
drh
da4ca9d19c Add new APIs that take 64-bit length parameters: 
sqlite3_malloc64(),
sqlite3_realloc64(),
sqlite3_bind_blob64(),
sqlite3_bind_texte64(),
sqlite3_result_blob64(),
and sqlite3_result_texte64().
Internal memory allocation routines also now use 64-bit unsigned length
parameters for safety.
Also add the sqlite3_msize() interface.
Fix the sqlite3_get_table() to use sqlite3_realloc64() to avoid a
integer overflow problem.

FossilOrigin-Name: 94954850cf2e1ec0b7f590c7f46cdc54c72558ce
 2014-09-09 17:27:35 +00:00
peter.d.reid
60ec914c74 Fix typos in comments. No code changes. 
FossilOrigin-Name: e62aab5e9290503869e1f4d5e0fefd2b4dee0a69
 2014-09-06 16:39:46 +00:00
drh
0f8f26716c Add support for using separate worker threads to speed large sorts. 
The SQLITE_MAX_WORKER_THREADS and SQLITE_DEFAULT_WORKER_THREADS compile-time
options and the SQLITE_LIMIT_WORKER_THREADS argument to 
sqlite3_limit() and the "PRAGMA threads=N" pragma are added.

FossilOrigin-Name: b1c0f0bc1bd8a3477cd7a7ab510f0442ac88b517
 2014-09-01 17:36:46 +00:00