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mirror of https://github.com/sqlite/sqlite.git synced 2025-08-05 15:55:57 +03:00

1674 Commits

Author SHA1 Message Date
drh
8d7f163015 Fix comment typos. No changes to code.
FossilOrigin-Name: 8e5e74c66b9cdb348392e3db2d9f32cfa20fcec35bf09d9e1f623e7ad875ec97
2018-01-23 13:30:38 +00:00
drh
8bfe66a9c4 Avoid unnecessary OOM detection warnings in a debugging routine.
FossilOrigin-Name: 395f8ea790e6e295800fa8927f0585b2419b9521ef4fd591d51d2a48db2a90c4
2018-01-22 15:45:12 +00:00
drh
092457b18c Change the function name to sqlite_unsupported_offset(X). Only enable the
function if compiled with -DSQLITE_ENABLE_OFFSET_SQL_FUNC.  The makefiles add
that definition to shell builds.

FossilOrigin-Name: 7a7f826e324b1a2c332e2f1d0740fd0babffcaca6275a798572f02ad367b99ab
2017-12-29 15:04:49 +00:00
drh
fe6d20e9f4 Enhance location(X) so that it works with indexes and WITHOUT ROWID tables.
The function might return an offset to the main table or to an index,
depending on whether the column X would be loaded from the main table or
from the index.

FossilOrigin-Name: dd94d6a880dfec4bddd247239b815b84964f804d24841e25f33f1d46a4b5274d
2017-12-29 14:33:54 +00:00
drh
2fc865c115 Add an experimental location(X) SQL function that attempt to return the
location of the payload within the database for the record that contains
column X.  location(X) returns NULL if X is not an ordinary table column or
if SQLite cannot figure out the location because it is using a covering index.

FossilOrigin-Name: 51be9558164301c5dd4df23ab8b3e67de0b522f8d36f79f3d84d45d3dc2a83a4
2017-12-16 20:20:37 +00:00
dan
eebf2f5747 Enhance the log messages produced in some cases if database corruption is
encountered by an SQLITE_DEBUG build.

FossilOrigin-Name: 23a3128083834b5fc80adf45448f7dc65587c52761fb3c9483b80313b369406f
2017-11-18 17:30:08 +00:00
dan
f2f72a0f9f Take extra care to avoid an OOB read caused by a corrupt b-tree page.
FossilOrigin-Name: 04925dee41a21ffca9a9f9df27d8165431668c42c2b33d08b077fdb28011170b
2017-10-19 15:17:38 +00:00
drh
8a18100d44 Fix a typo in a numeric constant in an assert() - a bug that has been present
in the code since check-in [79e22b95038] on 2010-03-30.

FossilOrigin-Name: f0a2724f0a255cd5a262f31e4ee1f99ae713c25a9ecc56dc794c95f223453b9b
2017-10-12 01:19:06 +00:00
drh
2ed5737aca Fix compiler warnings that come up with SQLITE_OMIT_WAL.
FossilOrigin-Name: 8ca0fa8dfe6a66aea7fc63f15e6f704cb190aa0760a3fec2db5f6bad3861a135
2017-10-05 20:57:38 +00:00
drh
c6aa38159b Updates to requirements marks.
FossilOrigin-Name: 40964a4ef7565ea0ddf452f48cb22373d068528e07d40eefc008f2231c969422
2017-10-04 18:26:44 +00:00
drh
4e6cec1ca0 Fix an issue introduced by check-in [4cd2a9672c59] (2017-03-03) that could
allow a negative value in the 3rd parameter to memmove() when
defragmentPage() is called on a btree page with a corrupted
freeblock list.  The corruption is now detected early and results in
an SQLITE_CORRUPT return before the memmove() is reached.

FossilOrigin-Name: 5b9ae693120fe4f7bc3b6270f35d773876f6cc8f5990e05cce0d255c54b36ae7
2017-09-28 13:47:35 +00:00
mistachkin
88a7973057 Use the SQLITE_CORRUPT_BKPT return code in a couple more places.
FossilOrigin-Name: 72d22c226bf4311345e8844fd9801ebddf77aceb80a038dce46608bf4ccae636
2017-09-04 19:31:54 +00:00
drh
3908fe90b1 Add the new sqlite3PagerUnrefPageOne() pager method to deal with the special
case of unreferencing page1.

FossilOrigin-Name: b2e2100cf766da1cb499aec0ca0a9969d7af5d93312ab8cf895fbf4a6ffb9b2f
2017-09-01 14:50:19 +00:00
drh
b2a0f75c06 Remove the rarely-used scratch memory allocator. This makes the code smaller,
faster, and easier to maintain.  In place of the scratch allocator, add the
SQLITE_CONFIG_SMALL_MALLOC configuration option that provides a hint to SQLite
that large memory allocations should be avoided.

FossilOrigin-Name: 54b000246cfb5c7b8adb61a17357ef5a49adddde9e48e8937834d5ba0beb8a6b
2017-08-28 15:51:35 +00:00
drh
6034846eb6 Convert a branch made unreachable by [59560d07] into an assert().
FossilOrigin-Name: 2738b8db3caa6ce48d27cb5749d27b79241e6f6682b694886f6ef663e5443583
2017-08-25 13:02:48 +00:00
drh
87d63c900d Performance optimization to pageFindSlot() in the b-tree layer.
FossilOrigin-Name: 59560d079fab4b91ec50855cc60349da178209c38fb6dae674ff874ccfc7f5fa
2017-08-23 23:09:03 +00:00
drh
5e398e4cbd Size and performance optimization to dropCell() and freeSpace().
FossilOrigin-Name: bc1ec123ce05c9d16b0942f870381145dc9725764e47806939ff207a73066f4d
2017-08-23 20:36:06 +00:00
drh
5e27e1dc49 Smaller and faster implementation of the fillInCell() routine.
FossilOrigin-Name: 77074990edef6c42bdfe7ccce1affc8ed64a86dde3ad4fa50b60ba0a6d851eea
2017-08-23 14:45:59 +00:00
drh
fe0cf7a18c Avoid a test for CURTYPE_BTREE in sqlite3VdbeCursorMoveto() in order to reduce
the size and improve the performance of OP_Column.

FossilOrigin-Name: f078deb25149b7b1881b7f3374b343d0677e82336d8fdd7f1cdd06d926b5dd57
2017-08-16 19:20:20 +00:00
drh
352a35abf5 Btree optimization: New field BtCursor.pPage that points to the current page,
saving a single pointer dereference on each access.

FossilOrigin-Name: 373b71d19cad785922d5a80828f2fee0cbe7dff6594743e625bbdfa31b1ca131
2017-08-15 03:46:47 +00:00
drh
f38dd3b68f Minor size and performance optimization to sqlite3BtreeCloseCursor().
FossilOrigin-Name: 16969338841734d00ab906a94b82480c7e1e426eb0ddf7b9e6aed722aee5d91f
2017-08-14 23:53:02 +00:00
drh
44548e7218 Change the internal btree routine moveToRoot() to return SQLITE_EMPTY if
the table is empty or if it has pgnoRoot==0.  This simplifies the callers,
making them smaller and faster.  The SQLITE_EMPTY result code is intercepted
and changed into SQLITE_OK before surfacing in an API.

FossilOrigin-Name: 240d57143d943eaddd5f7c2d473f47a1d29417e61d28142f70f3d960bb9b30df
2017-08-14 18:13:52 +00:00
drh
f0357d8b2c Fix harmless indentation error.
FossilOrigin-Name: 25e92baaaeb9e8a2650b3083d3febf3661ecf1e05d9d24b26fe9f87a03bdd8fa
2017-08-14 17:03:58 +00:00
drh
60172a5a93 Minor optimization on clearCell()
FossilOrigin-Name: f3c39c2986be08683c2af4df610bc12e3c6bc6bec265c94ce01b94a950723524
2017-08-02 18:27:50 +00:00
drh
85ef630fde Optimizations associated with error handling in btree cursors.
FossilOrigin-Name: 49ba54e26731ed371745d4bdd9dd1dfeb73357b6d206c85a4252ec866be971d0
2017-08-02 15:50:09 +00:00
drh
8999798e60 Fix harmless compiler warnings in the core.
FossilOrigin-Name: 55e93f256018757e5e1cb3b10ef48abf5914e7687419eae58b00998a37061261
2017-07-11 18:11:33 +00:00
drh
08f1efeb16 Add the "PRAGMA secure_delete=FAST" option, which overwrites most deleted
content without increasing the amount of I/O.  Deleted content might persist
on the free page list, however.  And extra CPU cycles are used for zeroing,
of course.

FossilOrigin-Name: 38978ce65b280bb7cba3fc08ba91485fb1b84cd9fbba2e950ecf41c021ff452a
2017-07-07 20:06:28 +00:00
drh
169dd928c5 Add the SQLITE_DBCONFIG_ENABLE_QPSG option to activate the query planner
stability guarantee.  This involves refactoring the sqlite3.flags bitvector
to carve out a free bit to use.

FossilOrigin-Name: 7076e8283ebae1b45a5d85d9538b49b6da399d38c3c6935de100f948f814f6a9
2017-06-26 13:57:49 +00:00
drh
a5907a86b8 Experimental "PRAGMA secure_delete=FAST" pragma. The intent is to overwrite
deleted content with zeros without increasing the amount of disk I/O.

FossilOrigin-Name: f1682f0faf1a93ded066464b1ddd5f987e21ee0f6bb5e828ed31c3ad903cf2c3
2017-06-19 11:44:22 +00:00
drh
c62aab5ba8 Fix a potential null-pointer deference following OOM introduced by
check-in [e39795d7] (unreleased).

FossilOrigin-Name: a2f77285fa44df86863eed576271f1030ec60f15480daf175908c5082c27774b
2017-06-11 18:26:15 +00:00
dan
ca66f6c6f4 Ensure pointer map entries are always added when a row that does use overflow
pages replaces one that does not in an auto-vacuum database. Fix for
[fda22108].

FossilOrigin-Name: b30dfba811cb531b09ff2e71a1a18ed53c816cb39155dd52ca3e2701425fe17b
2017-06-08 11:14:08 +00:00
drh
cc97ca4c08 In SQLITE_DEBUG mode, attempt to log the page number of the database that
contained the problem when SQLITE_CORRUPT errors are seen.

FossilOrigin-Name: e39795d7d798d5249c7bd2a0f6ff891b455f4300a3d638c39a4668323b367666
2017-06-07 22:32:59 +00:00
drh
2ab792e4c0 Change sqlite3BtreeNext() and sqlite3BtreePrevious() so that they return
SQLITE_DONE if they have already reached the end (or beginning) of the table.
This gives a performance increase and size reduction.

FossilOrigin-Name: e972a3860892022d57b26ec44ce0fbadc61c1ff54b7a10b7e82390db88d323a7
2017-05-30 18:34:07 +00:00
drh
14e845a9d4 Small performance increase and size decrease in the btreeInitPage() routine.
FossilOrigin-Name: 6f415833e0554706dcf04f68ecba4ca2e54c08f3bbf6a1dba182bb132c912a2e
2017-05-25 21:35:56 +00:00
dan
4b2667c8b8 Enhance "PRAGMA integrity_check" to detect duplicate rowids within a leaf
page.

FossilOrigin-Name: adcad37b001d255299be716b16003b56ec1fba349ef73261ee0e543186c4f311
2017-05-01 18:24:01 +00:00
dan
874080bbb6 Clear the BTCF_ValidNKey flag set if a cursor is moved by
sqlite3BtreeInsert(). Fix for [f68dc596c4].

FossilOrigin-Name: a6727eef6d757a39ad23e5c8cbe960f5d909e5d37cb4e90bc3bdbb8bf58cd6f8
2017-05-01 18:12:56 +00:00
dan
a1188d6d93 When building an ephemeral table of integers, do not assume that the table
does not already contain N if the insert cursor points to N-1. Fix for ticket
[61fe9745].

FossilOrigin-Name: 1c1b0862236f564283be08338790d6494e705f1198547a59499e3f8c07f2cd99
2017-04-24 14:16:55 +00:00
drh
75e96b3100 Save a 78 bytes of code space and a million CPU cycles in speedtest1 by
storing the cell index for the leaf page in the BtCursor object in its own
field (BtCursor.ix), rather than as an entry in the BtCursor.aiIdx array.

FossilOrigin-Name: 2452f0617d1085689264b5f66681788cfe9e3b1a7b318307c93942b702a443df
2017-04-01 00:20:06 +00:00
drh
9ca431aef8 Avoid unnecessary blob handle invalidation when changes are made to an
unrelated table.

FossilOrigin-Name: 4a01880b62706c12d6f16f7c2b5c8b0dc67a9a8a0a48c5b42451e1a133e85611
2017-03-29 18:03:50 +00:00
dan
fc8f4b658c Fix a typo causing the build to fail if SQLITE_DEFAULT_SYNCHRONOUS==SQLITE_DEFAULT_WAL_SYNCHRONOUS.
FossilOrigin-Name: df39adeaa4d73a3d4ec831843b8ec7fd449f8b2137bdc7d7c320958d00e98db6
2017-03-16 18:54:42 +00:00
dan
f5da7dbb07 If the user has not set it explicitly, set the "PRAGMA synchronous" setting to
SQLITE_DEFAULT_SYNCHRONOUS when a database connection changes from wal to
rollback journal mode.

FossilOrigin-Name: 78030c0f52aa39fb2ab32c75c56e6bcefe6382b8df28b1909e3c911e42dbeca3
2017-03-16 18:14:39 +00:00
drh
063d57039e Merge updates from trunk.
FossilOrigin-Name: 5f7fc79aa06ca9b79664c50c3c277c98a74ff9a0
2017-03-06 11:39:34 +00:00
dan
30741eb0d3 Fix a case introduced by [4cd2a967] where a corrupt database could cause a buffer overwrite.
FossilOrigin-Name: 5d0455fece514552ad7f283d56526f53d7c688bd
2017-03-03 20:02:53 +00:00
drh
8d990b34db Merge recent trunk enhancements.
FossilOrigin-Name: c60cdb47612c05c252613e50a8ac10635469fdfe
2017-03-02 13:22:04 +00:00
dan
3b2ede1f03 Tweak the code on this branch to detect b-tree page corruption in the same cases as the trunk.
FossilOrigin-Name: f9863b39d96dce6cb5e49a5f3a445ff3d897a951
2017-02-25 16:24:02 +00:00
dan
e6d065a81e Optimize defragmentPage() in the case where the page contains either one or
two free-blocks and a small number of fragmented bytes.

FossilOrigin-Name: 202b1c0276aec6b8da64d3277de1ad91c9d62d80
2017-02-24 19:58:22 +00:00
drh
555227bec0 Add two NEVER() operators in the sqlite3BtreeRowCountEst() routine.
FossilOrigin-Name: 7a959f6d1ea038988cdb4c02d6f37abaec2580a0
2017-02-23 02:15:33 +00:00
drh
dfe11bae99 Fix errors in the table resize detection.
FossilOrigin-Name: 4229caec0b60a1617b9d5ff94b47271cbd7be1e0
2017-02-18 02:42:54 +00:00
drh
5e98e838da The analyze_as_needed pragma now responds to table size growth and will
automatically rerun the analysis after each 10x size increase.

FossilOrigin-Name: bfbdd07409688fac4ccddbab3639745f6152e23d
2017-02-17 19:24:06 +00:00
drh
d879e3eb8d Change all legacy instances of "#if SQLITE_DEBUG" to "#ifdef SQLITE_DEBUG" for
consistency.

FossilOrigin-Name: 670f10b24230863688270d12ac519609ade2302b
2017-02-13 13:35:55 +00:00