Commit Graph

23024 Commits

Author SHA1 Message Date
drh
d622855e34 Set the database connection error code for an oversize argument to
sqlite3_bind_blob64() or sqlite3_bind_text64().
[forum:/info/a636276f0d451667|Forum post a636276f0d451667] and
[forum/forumpost/33821c8db543c|33821c8db543c].

FossilOrigin-Name: 56ff58c0b8905aa10c85f1418da8d6089d23fd9a220c5cb17027d46affe05002
2021-06-09 14:45:02 +00:00
dan
8d2a9c3b3a Add defensive code to better handle corrupt records in fts5.
FossilOrigin-Name: a99c29b5efaf17e34506cda5ce017ec0112b3cb24bf8a2f1831f0c14a8aa8d30
2021-06-09 13:39:11 +00:00
drh
18f9be897d Remove two assert()s in FTS5 that checks for database corruption right before
actual code does the same check.
dbsqlfuzz 9680db8f5338cb9b6060eb3a02d984555d4472e3.

FossilOrigin-Name: f3f82967b2e9fd4168d86300138ac4bbcd6ffd7a3ff5ecf20acdc29e5356ac3b
2021-06-08 23:46:59 +00:00
drh
26ec568d28 Try to avoid a double-free in the showdb utility program when running
pgidx on a corrupt database.
See [forum:/forumpost/a60ea5a4d4|forum post a60ea5a4d4] for context

FossilOrigin-Name: e3188a866362894d98521b3006fb5b9a63fe4a3bb2ff4f1b58acb6eb4e52da8f
2021-06-08 17:56:16 +00:00
drh
9025af1603 Add an assert() to prevent the value of the SQLITE_VTABRISK macros from being
changed in a way that would break logic.

FossilOrigin-Name: 33babdb582ca712cc089165a953972096b57d1cb683954fa830df5e7befaadba
2021-06-08 12:22:24 +00:00
dan
822810b95a Avoid a buffer overread in fts3 that could occur when handling corrupt data structures.
FossilOrigin-Name: 45f459d2fa4be97d9bbb970efbc0b5d40efaf93f52ed111fd0fcdc572c24327b
2021-06-08 12:15:56 +00:00
dan
bc85a51595 Fix a buffer overread that could occur in fts5 when handling corrupt records.
FossilOrigin-Name: 078962a2164a784b135bacee51ef10973dc2e30de04353d48698d0e72edd63d8
2021-06-07 17:36:57 +00:00
dan
ec73546103 Fix a buffer overrun in fts3 that could occur when handling corrupt records and '^' queries.
FossilOrigin-Name: 9d0b6b0f42a47a3892ebc765250756fb8b844e8399d992a8b65f55af3800ea06
2021-06-07 15:28:33 +00:00
drh
09c69fc1b3 Add recent dbsqlfuzz test cases to test/fuzzdata8.db.
FossilOrigin-Name: 162022003c2b4a393296939e2616bd3c7bbfd65b198ba6c9894e4234de2d3122
2021-06-07 14:21:03 +00:00
drh
ccf0bb49bb Avoid use of uninitialized memory while running defragmentPage() on a
corrupt database file.
dbsqlfuzz 4c45cecc0b255aaf2ea85453ccd17e814fd0b6b2

FossilOrigin-Name: 35e40d75754ec6fb93fe57c6ecbe731104e77c997d7e17ef1a22984837dfcab2
2021-06-07 13:50:36 +00:00
drh
fe972341a5 Fix an assert() in the OP_ParseSchema opcode that might fail on a corrupt
database file when running with PRAGMA writable_schema=ON.
dbsqlfuzz e7d743ca65f2767e415095f0c5a49166a0f55eea.

FossilOrigin-Name: 10801f65af495a999ef61741322ea82dc20bd92ea8e55e4016c409096f38b0d1
2021-06-07 11:50:23 +00:00
drh
9a4127a8c1 Remove unnecessary end-of-line whitespace from the regexp.c extension.
FossilOrigin-Name: 17e26a1f5e3cc4e96b9265dcdbf54f376304b0908f3ff0a0d3df33653e77e5b6
2021-06-07 00:54:38 +00:00
drh
9ae57841d0 Omit the unnecessary highlighting of the security implications of
SQLTIE_DIRECTONLY in the sqlite3_create_function() documentation.
No changes to code.

FossilOrigin-Name: 2aa9368b63b42ac7c700516f109edcc6098c12b850eae591afed4e51a3f41819
2021-06-07 00:41:18 +00:00
drh
06258a4260 A better fix for the problem addressed by [4eb80b0cc61526c1]. This fix
also avoids reading uninitialized variables.

FossilOrigin-Name: 1c71de43dbc68002c4a6229e7efffb019655baff67a51fe922571fe420c95835
2021-06-04 23:26:56 +00:00
larrybr
e427fe5210 Make MSVC build examples work when taken literally, and say when they do.
FossilOrigin-Name: b53ca8ed8336d9e442a920e1c05a17a38dadc2fd1e0cb73e68d380ef34c87af8
2021-06-04 21:46:29 +00:00
drh
946b65793c Improvements to the OP_SeekScan optimization. Added the
SQLITE_TESTCTRL_TUNE test-control.

FossilOrigin-Name: 9a2ab6092d644fc3effc4ab4aca33efb2b4dd4213b2154d518a3e87eec4d3983
2021-06-04 17:47:08 +00:00
drh
50dce5e82f Add the (missing) dependency of regexp.c to the shell.c rule in the makefiles.
This dependency should have been added by [5d4535bfb603d7c8] but was missed.

FossilOrigin-Name: c93be7e66039e4c27b86f49d29f5c653cc6c02f6cbc6ad02d8bb1d32d0240863
2021-06-04 16:17:38 +00:00
drh
abc15f1b9a Fix harmless compiler warnings.
FossilOrigin-Name: 83aca2d8704e51eeed5652b1506c6fc883c0397728cda456f229369788b8608a
2021-06-04 16:11:19 +00:00
drh
9718bca77f Fix more cases in the regexp extension where the 0x00 terminator at the end
of the input string is being pattern matched.
[forum/forumpost/9104f0d9e7|Forum post 9104f0d9e7].

FossilOrigin-Name: 569e00d4acd426667990d675ca5da48a1859ac84af2412464ecd29c7c5da828c
2021-06-04 15:56:43 +00:00
drh
2d26cfcc4a Revamp SQLITE_TESTCTRL_TUNE to provide visibility of current turning
parameter values.

FossilOrigin-Name: 677e645e69e1f06487c26da6671fc03f0fb89a0f8e0d35712e6bdcf7279bdfc4
2021-06-04 13:40:26 +00:00
drh
f3c1256a4d Add support for SQLITE_TESTCTRL_TUNE and the ".testctrl tune ID VALUE" command
in the CLI.

FossilOrigin-Name: f1199d58b9cfdcddb83bc35544ce38299ac4ed50d7ab90d33463f6ccce526feb
2021-06-04 13:16:46 +00:00
drh
2540a7482a Merge recent trunk enchancements into the seekscan-improvements branch.
FossilOrigin-Name: d9e85fe80cdd3d798a583a5f99148235d0c3f39adfabbc661615893c387e6e45
2021-06-04 12:29:22 +00:00
dan
19e4eefbca Fix a case where combining row-value UPDATE FROM syntax with window functions over aggregates can cause an error.
FossilOrigin-Name: 4a587c3492faa99490fd67ca1de9fceafcdc12d220f42817791923be258b73f1
2021-06-03 18:56:42 +00:00
drh
a6df0e693f Fix the truncate optimization so that PRAGMA count_changes and changes()
return correct values even for a WITHOUT ROWID table.
[forum:/forumpost/07dedbf9a1|Forum post 07dedbf9a1].

FossilOrigin-Name: 820ae3b117c2d8c117c0c5a4e440a7d06886772516c7fc0a84606388f91be195
2021-06-03 18:51:51 +00:00
drh
6468990e7b Add the regexp() and regexpi() extension functions to the CLI.
FossilOrigin-Name: 5d4535bfb603d7c8229ef60f99666459f2997e02e186bc1e52b7ec1320251d67
2021-06-03 13:51:31 +00:00
drh
de30a3d2e1 Fix a bug in the regexp extension in which the "." wildcard would match
the 0x00 terminator at the end of the comparison string.

FossilOrigin-Name: fa23108b299fc70e80540c449500e50ac6344a152f4f6b9c1b1f568bbda8f6e1
2021-06-03 13:44:19 +00:00
drh
75f7317722 Fix the case-insensitive version of the regexp() function so that it does not
use the prefix optimization incorrectly.
[forum:/forumpost/983b43ef8e|Forum post 983b43ef8e].

FossilOrigin-Name: 1a8e43cc1b7969c40140dd7fd481d5ffd9de80e214eb494567c286d93a2b06e5
2021-06-03 12:31:08 +00:00
drh
3074faabed Add an optimization control bit to disable the OP_SeekScan optimization.
FossilOrigin-Name: f674c41e5cbbb08ffc3cc00ab449229b672054c872e209337f12e7eacb531fe5
2021-06-02 19:28:07 +00:00
drh
9966439879 Fix an ALWAYS which can be false.
FossilOrigin-Name: a87f8ecd6db11ea40a15314b875fc78289c19ab2dec6f738b4bf37f4aafa7bbd
2021-06-02 18:50:39 +00:00
drh
e847164f55 Tighten assert() restrictions on the OP_SeekScan opcode.
FossilOrigin-Name: dbc33d3ae30de5427a4351824a11026145f778fad95bd0b825bd0a4b63059677
2021-06-02 17:32:51 +00:00
drh
eda790d28b Never use WHERE_IN_SEEKSCAN for the 2nd or subsequent IN operator.
FossilOrigin-Name: d0b98619082038ed451912bcdf56568835a8577989a25cacf25591f2366d4f52
2021-06-02 17:14:50 +00:00
drh
b034a24140 This is an attempt to address the OP_SeekScan performance issue identified by
[forum:/forumpost/b4fcb8a598|forum post b4fcb8a598].

FossilOrigin-Name: d58efb3f21a4150b8136197e43837c7b646c42d492a7c24ddc7591dba415a2c8
2021-06-02 12:44:26 +00:00
mistachkin
f9ac1ab1e7 Fix issue in 'mkopcodeh.tcl' tool that prevented its termination in rare circumstances.
FossilOrigin-Name: a8d921136f8ab132279984a77d0eeaf355342cdb0a98d7e1e59c8e6c8ed9459c
2021-06-01 21:07:49 +00:00
dan
b56a09079e Fix a problem with running ALTER TABLE against schemas that contain compound SELECT statements with ORDER BY clauses containing one or more references to the second or subsequent component SELECT statements.
FossilOrigin-Name: 587a3044468a40707c714d013cb766d8a4d9eb13bb20871846a0e8c34bea8cf4
2021-06-01 15:37:14 +00:00
drh
d65b7e36ec Do not confuse the ">" operator with IS NOT NULL when checking to see if
a partial index is usable.
[forum:/forumpost/d813704d7c|Forum post d813704d7c].

FossilOrigin-Name: 8cc23931d61b7d78521acce93fc2603649c5813c7a0869cb2c1bde2c8c4e51b4
2021-05-29 23:07:59 +00:00
drh
d36bcec9ad Fix a subtle error in an assert().
dbsqlfuzz eefbd0215c0c1b4bcc32b8141b48b35f7b431300

FossilOrigin-Name: a5ec81eb49e55fc03591666f336c09e5469785c8680f253ec3cc5366ac2fa45a
2021-05-29 21:50:05 +00:00
drh
e9de65201c Make a deep copy of the result of a subquery in case the subquery is
reused.  Fix for the problem reported by
[forum:/forumpost/28216b36ac|forum post 28216b36ac] and introduced by
check-in [f30fb19ff763a7cb].  Further changes to try to optimize the new
OP_Copy opcode back into either OP_SCopy or OP_Move will be attempted
separately.  A test case will be in TH3.

FossilOrigin-Name: c9f0b9cb0aef107265435e22c164dd3c974eadfd00abf7cfd4fc7ec95c0dd7d0
2021-05-28 12:48:31 +00:00
drh
d2f55773f1 Fix a potential memory leak in json_group_object() following an error.
dbsqlfuzz cd32630de3ff039d97089592b63cb3616f8ec9dd

FossilOrigin-Name: 21676731cedae27d1ab9fe62b269001ae6e3eeb3caa87b4f5536f777631a8bbc
2021-05-28 12:15:19 +00:00
drh
48a296c589 Add the merge-test.tcl script to ease verification of LTS branches.
FossilOrigin-Name: f958ffbc61c693b71538cc3aa5f95ce0f0b5d4906efbb0c075f543e19883a669
2021-05-27 16:31:04 +00:00
drh
342cb33b23 Improved comment on the prpagateConstants() routine. No changes to executable
code.

FossilOrigin-Name: d61a875df48d8baab3ada0174c8e0312a9268bbd11bf104b4385eff9e2744266
2021-05-27 14:09:01 +00:00
drh
48f4f27cfb Remove a NEVER that is reachable following OOM in writable_schema=ON mode
with a corrupt schema.

FossilOrigin-Name: 4eb80b0cc61526c1ff7478b1b855b29fa4326daee61facd1d85e4297bb32ac9d
2021-05-27 10:23:16 +00:00
drh
7d11e647ad Improvements to the constant-propagation optimization in order to better
deal with unusual affinities.  See
[forum:/forumpost/6a06202608|forum post 6a06202608] for more detail.

FossilOrigin-Name: 9be208a6d70582c6808abe6e016ab9cd8d10f0deefb8c7a8c0543372cca15b12
2021-05-26 23:10:19 +00:00
drh
a8ed515400 Minor optimization to opcode comparison logic in the fixes to
the constant-propagation optimization on this branch.

FossilOrigin-Name: f17dec40a0ccc044bd32e035fc10797552329af242408a45f36125ed8d2ef088
2021-05-26 19:52:21 +00:00
dan
c3b48848b3 Add new test file whereM.test. Containing tests for the change on this branch.
FossilOrigin-Name: c4c76b824c41afb5b4d7b397c4d3142698aa303ea3a368c0cc7af4884e3a10bd
2021-05-26 19:37:27 +00:00
dan
40b82f9dc6 Avoid assuming that an expression like "x=10" in a WHERE clause implies that CASE(x AS TEXT)=='10'.
FossilOrigin-Name: 389ec669f416c74d651e25572f6e007c2a62ddd4027524f553107b06db5c55eb
2021-05-26 18:51:57 +00:00
drh
14c4d42874 Take care that the code is not generated for the same Select object more
than once, as transformations that apply during the first pass might
cause problems for the second pass.
dbsqlfuzz 836b625cd8a41809ef80fc7ebaa6554357bcb463.

FossilOrigin-Name: f30fb19ff763a7cbe768ea49954704e14d6400f69bb4257c9c890e1564e14835
2021-05-26 18:46:51 +00:00
dan
151446e793 Update an assert() in wherecode.c that might fail following an unrelated SQL error.
FossilOrigin-Name: 3e2c36a8272ab3c1777638c0ed8222e7ff04657fe1c40f74a63b99a5a90258cc
2021-05-26 14:32:33 +00:00
dan
137b8ebb2b Do not run sessionbig.test as part of the session_strm permutation. It is too slow.
FossilOrigin-Name: 708ce7ad8acee702d08d1987aa253b0bfc3fd97255d6e4153122b03eba337570
2021-05-25 16:10:12 +00:00
dan
4df68e0ae5 Update an allocation routine in the sessions module to allow it to allocate the maximum size permitted by sqlite3_realloc64().
FossilOrigin-Name: 0b45e821911e4a852edd6d9e9cfe5f9de33337edf76fb12b79adaf11a4b83e8a
2021-05-25 15:21:54 +00:00
dan
78a9d7551c Enhance the shell tool ".dump PATTERN" command so that it dumps the contents of shadow tables when a virtual table is identified by the PATTERN.
FossilOrigin-Name: b0bc5ab9ceec496ac260ccfd53b51a2b53a81576fbe04c97b99f6705b063c59f
2021-05-25 11:39:14 +00:00
dan
c00727ab58 Fix a problem in the in-memory journal code that could occasionally lead to a segfault when a sub-transaction that modified zero pages was committed.
FossilOrigin-Name: 17960165f5840cab45b7a8bb02779ebfb321c68f33ec6da9ab14063ccd134fa4
2021-05-24 14:35:19 +00:00
drh
0fcf6f01e7 Minor comment improvements in fuzzcheck.c.
FossilOrigin-Name: 7aca8d52c16c2192d9c1ff03a976c482a60365cef8d2474b540ff4c84e8737b4
2021-05-24 12:28:13 +00:00
drh
b6b06bb339 New dbsqlfuzz cases added to test/fuzzdata8.db.
FossilOrigin-Name: 5bb5c9ec049488f95e47bbd9f1db9038ffabad3cfafa613acdaa790ab4034eee
2021-05-24 12:13:10 +00:00
drh
bf7f3a005e Fix the TreeView module so that it works with the TK_ERROR exprssion.
Also fix an assert() that was failing due to the recent TK_ERROR addition.

FossilOrigin-Name: dd56fbe0cfb0f7848190ce097b378321dd25ae509c7edf93682b091014824fc6
2021-05-24 11:35:16 +00:00
drh
0542812726 Additional defenses (above and beyond [b986600520696b0c]) to prevent an
invalid subquery from causing problems downstream.  If an error is found
while analyzing a subquery expression, change the expression to TK_ERROR
so inhibit further processing on that expression.
dbsqlfuzz cf624b8c0484c66e0f552bf6475e3e3f2c22b24e.

FossilOrigin-Name: 0be6b6c9f7c562e764792a4a5eb53ed11b230174b19361f7cd7778c743314bbd
2021-05-24 00:17:04 +00:00
drh
7cc73b399e Do not push a WITH clause onto the processing stack if prior errors have
occurred.  dbsqlfuzz 6b7a144674e215f06ddfeb9042c873d9ee956ac0.

FossilOrigin-Name: c2066dde53b9872dbb991e27419dd031791c942fe23826556f52efbd66c51662
2021-05-23 17:47:04 +00:00
drh
5e1a7ded4d Do not invoke sqlite3ExprAffinity() after a syntax error that might have
left the tree in an inconsistent state.  See also [e8a1515b44380cc5] and
[forum:/forumpost/7e484e225c|forum post 7e484e225c].

FossilOrigin-Name: b986600520696b0c91c4ccc6aff1b698391b4bcaf8a3ea436be1967883faa2fe
2021-05-22 11:23:20 +00:00
drh
ff9186137d The fix in the previous check-in was only correct if the OOM occurs on
the initial allocation.  This changes should make it correct for a resize
as well.

FossilOrigin-Name: 57087ab2f297e4d96da5b9f3b89a26d8dd2bc4d22c2be8045b5d956d86282f39
2021-05-22 11:00:03 +00:00
drh
d42dbd9dfe If an FTS5 Cursor fails to enlarge the space for the aInst array, set the
size of the aInst array to zero.
dbsqlfuzz 294254b8105cca409f27a711f1eb2e9e63cbcac5.

FossilOrigin-Name: 4ae5e5b5ecbce580d3f7f970076e828fc6fb5fbcdc3bbe8381ab38f52870a54f
2021-05-22 01:30:30 +00:00
drh
93c8139c1a If there are errors in a nested CTE, be sure to abandon processing. Do not
continue since the parse tree may have been left in a goofy state which could
cause use-after-free and segfaults.
See [forum:/forumpost/aa4a7a3980|forum post aa4a7a3980] for an example.

FossilOrigin-Name: 94225d693932eb0b5d7799d40513afbd31ed40e1e156675eb92ad7216f1ff20f
2021-05-21 21:49:07 +00:00
dan
acef1abda2 Fix a problem with SQLITE_MAX_MEMORY in malloc.c.
FossilOrigin-Name: c18dbe2f389f4ba7b219b7995d4f7009d1bc249ef8f93a30b262c6d2c008319d
2021-05-21 16:41:22 +00:00
drh
ec2f689b21 Fix a faulty assert() statement in sqlite3ExprListDup(). This is a continuation
of the fix at [59812e7ef705226c].

FossilOrigin-Name: 240f7494bfa3e0806ae2f971e78039c62a419de647cb9e807309f90e1d2a536d
2021-05-20 23:25:28 +00:00
drh
a76b7f5296 Enhance one test case to use various alternative definitions of DUAL.
FossilOrigin-Name: 179dcb6ba771f0e94e06b5e3c5534d8005d27b2c9b4601be20fd68abfbc5dfd0
2021-05-20 18:11:45 +00:00
dan
90bc36fb30 Ensure that objects within view definitions are not incorrectly resolved to CTEs that are part of the statement using the view.
FossilOrigin-Name: f7dcc4b5197c6413be31384b390bb98a737d3f9edb7964433448c3b90b35a436
2021-05-20 17:15:06 +00:00
dan
a8f249f1e7 Ensure the required b-tree mutexes are held for "CREATE TABLE IF NOT EXISTS" and "DROP TABLE IF EXISTS" statements on attached databases.
FossilOrigin-Name: 67bde01614edd944b769ab28488bac1dbbf17d88beee62ca7f1e45681aa3d402
2021-05-20 11:42:51 +00:00
drh
cd1499f47b Replace [0f0959c6f95046e8] with a new and better solution that also fixes the
CTE name resolution problem described in
[forum:/forumpost/8590e3f6dc|forum post 8590e3f6dc].
Test cases for both problems added.

FossilOrigin-Name: 5614279daff5007d6e047c5c1b3cc82ba80a5c91c529525b0fe68b79ee82dd2c
2021-05-20 00:44:04 +00:00
drh
5da5b71435 Fixes and improvements to PRAGMA compile_options.
FossilOrigin-Name: 34579549a3bc1c2cfbf47a4770c1d7abc97869ba57bcd3ab1515765ca505ea05
2021-05-20 00:10:24 +00:00
drh
1168f81092 When constructing the synthensized SELECT statement that is used to choose
the rows in an UPDATE FROM, make sure the first table is really the table
being updated, and not some common-table expression that happens to have the
same name.  [forum:/forumpost/a274248080|forum post a274248080].  More
changes associated with CTE name resolution are pending.

FossilOrigin-Name: 0f0959c6f95046e8e7887716e0a7de95da18d1e926ab1f919527083a56541db5
2021-05-19 21:55:56 +00:00
larrybr
14e250ac16 Incorporate ..._DESERIALIZE revision.
FossilOrigin-Name: b70587cca9e4f0116621e27362186e9329bcea8016c6565cd3ec5a9bf4a99d46
2021-05-19 20:01:53 +00:00
larrybr
4f878f33a9 merge from trunk
FossilOrigin-Name: 19ffe3cfe278a4046f32df56f75080c2377e4c44ad40a02d39db8e7701526204
2021-05-19 19:55:10 +00:00
drh
1f4f7c7a41 Add a comment with useful information about SHM locking. No changes to
deliverable code.

FossilOrigin-Name: 4e81ea3b15fb3fce5f31b77273639e748a735ab0970620e564e9a5c977b24a1a
2021-05-19 19:28:48 +00:00
drh
04f4b6836b Fix a formatting error on the comment.
FossilOrigin-Name: 6f2fb60e499fc758bea6ffec030fef8ab5f97d08d31450f0b3ffafc20e652891
2021-05-19 19:27:42 +00:00
drh
187e2e48a8 Add a table of shared-memory lock offsets in a comment in the os_unix.c code.
Include some assert()s to help verify the numbers.

FossilOrigin-Name: b480aacb3430a789d98ffd81a1886bbbc3cda5b0e736ec9a3e2b463db2a3b3ad
2021-05-19 16:55:28 +00:00
dan
3d691fd9ff Allow aggregate sub-selects within ORDER BY and PARTITION BY clauses of window frame definitions.
FossilOrigin-Name: 3daab94977af5e8a95690acc555540311403d890a3261a9757c633fcaaf428a9
2021-05-19 14:49:51 +00:00
drh
9088186bfb Improved column name and column type determination for the RETURNING clause.
FossilOrigin-Name: 699c33990a9438f28673ecf34f1e521d1af0b01c6ee30a608c0c91d2d593590e
2021-05-19 12:17:03 +00:00
larrybr
99bd552503 Cure some TCL test failures and narrow an object scope.
FossilOrigin-Name: 1155696c700862de1a8b1318bc41cd5cd01dec1af2c7720d8ef1e5c3321c425d
2021-05-19 02:33:42 +00:00
drh
93ffb50fcd In the MULTI-INDEX OR query plan, code for sub-expressions can sometimes be
generated twice.  But for some subqueries, generating code off of the same
tree twice causes problems.  So now MULTI-INDEX OR makes a copy of the
sub-expressions it uses to avoid code-generating them more than once.
dbsqlfuzz 9ebd2140e7206ff724e665f172faea28af801635.

FossilOrigin-Name: 4a55f72542c8bcc80253aa77043314cecb29d73cb4f51aa80f7811e86cc8ef68
2021-05-18 19:10:10 +00:00
drh
e74ca517b4 Improved comments on the generated opcodes.h file.
FossilOrigin-Name: f2a17f1fad08779486e4d50d0d9277c7f87a9558a53af1a68aa5fe2ec30e820e
2021-05-18 12:36:35 +00:00
drh
8ed1da195a Add a CORRUPT_DB term to an assert() added earlier today.
FossilOrigin-Name: 304739d2382446e7b698d67377679168e46f0a19bb0794fdf22d0a0a84a8cbcc
2021-05-18 00:52:06 +00:00
drh
904e48eb89 Fix harmless compiler warnings.
FossilOrigin-Name: ace12a3912a4fdc2f0e741361ec705652a11b6f5e3548d54bd6f273671ba1e09
2021-05-17 17:14:38 +00:00
drh
8546497383 Enhance the integer-comparison optimization on the OP_Eq and similar
opcodes so that it avoids a lot of useless work.

FossilOrigin-Name: 4221f41af9df90da4183d45d0edfae19b4f7095ec35a203c8dfd2712799e3839
2021-05-17 16:54:52 +00:00
dan
be12083bc7 Fix problems with refering to CTEs from within sub-selects in PARTITION BY or ORDER BY clauses of window frame definitions. Also a problem with renaming a column when the schema contains a trigger containing a correlated sub-select within a window frames PARTITION BY or ORDER BY clause.
FossilOrigin-Name: 4c6cd54a8db78e5535912e76856bed4f797261aaca4248c69d2e2452194de297
2021-05-17 16:20:41 +00:00
drh
ba39ca4058 When deleting an SQL function that does not exist, return without doing
anything at all rather than creating a tombstone function.  In this way,
function deletes that happen inside virtual-table destructors that are run
when a database connection is closing do not create new tombstones in the
function table after the function table has already been purged.
[forum:/forumpost/726219164b|forum post 726219164b].

FossilOrigin-Name: 391c73132c80df944fb49a17d8fe78203c54ac48f968ee9dd9dd8c769c0b4b10
2021-05-17 13:11:24 +00:00
drh
9430506df0 Performance improvement in sqlite3TableLock().
FossilOrigin-Name: 0d77e371c47107f67550e9bedfd26808fcfd84c7473f94b6053f75f0e3463c73
2021-05-17 11:19:32 +00:00
drh
2454e4a901 Performance optimization in the memory allocation of allocateCursor.
FossilOrigin-Name: 9d16323d14370b737399eb52b69b70cc614f78fb8a1e93f21a348c34a30dd456
2021-05-15 19:36:36 +00:00
drh
86c779fe42 Performance optimization to the clearCell() routine inside of btree.
FossilOrigin-Name: c4e02619a4dc8b07f658e7c88011991a086eb1e760d920b9024a11437daaabfd
2021-05-15 13:08:44 +00:00
drh
49bb56e9b0 Small performance improvement for sqlite3BtreeInsert().
FossilOrigin-Name: 4ae64484c57740333322cebd713b50b01a5a5838d41c65f67e26d65769770789
2021-05-14 20:01:36 +00:00
drh
6a9595a76b Avoid adding superfluous virtual WHERE clause terms that might arise due
to the constant propagation optimization.

FossilOrigin-Name: cf63abbe559d04f993f99a37d41ba4a97c0261094f1d4cc05cfa23b1e11731f5
2021-05-14 15:37:00 +00:00
drh
b775c97682 Attempt the [/info/f4229707ac08d66c|constant propagation optimization] on any
WHERE clause that has a top-level AND operator, even if the query is not
a join.  This is an attempt to partially address the concern raised in
[forum:/forumpost/830d37b928|forum post 830d37b928].

FossilOrigin-Name: e994c9f29f7a561dd5f30573865b0f793fb1388af09a2afb9b1a5b037ea52f89
2021-05-14 14:26:57 +00:00
drh
11c87895e0 Fix an over-length source code comment in whereexpr.c. No logic changes.
FossilOrigin-Name: af5eb902e7b13f50a8890098b85ae64a9d2ff4f122f3ab46ddb2c048b5c846a0
2021-05-14 13:32:07 +00:00
drh
31da7be9f2 Modify the sqlite3_stmt_readonly() interface so that it returns false for
CREATE TABLE IF NOT EXISTS statements even if the table already exists and
the statement is really a read-only no-op.  Likewise for DROP TABLE, 
CREATE INDEX, and DROP INDEX.  Update the documentation for
sqlite3_stmt_readonly() to reflect this new behavior.

FossilOrigin-Name: cf8eb465974e596a13df56f3efbc98e098e7b74de9af4fde9ad58312db9750e4
2021-05-13 18:24:22 +00:00
drh
756748ea86 The content columns of the index-btree that implements a WITHOUT ROWID
table are not ordered and so the query planner should not assume they
are ordered.  Fix for the issue identified by
[forum:/forumpost/6c8960f545|forum post 6c8960f545].

FossilOrigin-Name: c21bc5a2353e660f2acf5ed916921a4ee416910d0b3f2deb512a05c54138d1c0
2021-05-13 13:43:40 +00:00
drh
7ffb16b495 Further simplification of the reverse-order scan logic of the previous
check-in.

FossilOrigin-Name: b2b0e23ba885f22c88b03492e42c3cd1cbd59289e452263951bb757a871699f0
2021-05-12 22:15:44 +00:00
drh
0564cc2601 Fix the query plan for an indexed lookup on a WITHOUT ROWID table with
a DESC primary key when the primary key is constrained by an inequality.
See [forum:/forumpost/8988341615|forum post 8988341615]. Test cases in TH3.

FossilOrigin-Name: f65c929bf189cf5ca5f1cacdbbb8eec014c9960f767b135023bd2323cd26f279
2021-05-12 22:02:14 +00:00
drh
52d1407891 Fix a race condition that can lead to deadlock in the memdb VFS if one
thread is trying to open an existing database at the same moment that
another thread that is the only prior user of that database is trying to
close it.

FossilOrigin-Name: b635375dbe22bd31c437ca574eb0c014c0b045de6cc0816c32d2ceceff9191fb
2021-05-12 15:39:02 +00:00
drh
85ffcae177 Add the new threadtest5 test program for stressing multiple database
connections in the same process hammering on a single database.
Primarily designed to test memdb, but works on any database.

FossilOrigin-Name: 8db1c06958b8e1691440d4fd392648b74a1940b721852dabd315005efad520fc
2021-05-12 14:17:20 +00:00
drh
277ae64103 Enhance the memdb VFS so that it is able to share databases among multiple
database connections in the same process, as long as the database filename
begins with "/".  This provides a way for threads to share an in-memory
database without the use of shared-cache mode.

FossilOrigin-Name: 533fffc4a39b01c3aba75bd3271fd6ccd9516d9681ed04adbe19bd7de03f4c16
2021-05-12 11:55:59 +00:00
drh
2d344f944e Respond correctly to OOM during mutex allocation.
FossilOrigin-Name: 98dae595d861941bb0bcd12126ee02492587c466e6da579a58b5dc4a4d655917
2021-05-12 02:52:20 +00:00
drh
483051c9b6 Mark an unreachable branch as NEVER().
FossilOrigin-Name: 6c20d9d4b7c7986e8404142974a91dce7514ca574ee52ed5d036367aad396689
2021-05-12 02:09:01 +00:00
drh
f71d6fa9db Fix a NEVER() that can sometimes be true.
FossilOrigin-Name: 8f9f1cbc4468d07d693b418be4d89771fd240ee4af34395d7da5b7709fe88f37
2021-05-11 11:40:22 +00:00