database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-19 21:43:15 +03:00
Code Activity
23,340 Commits 1,611 Branches 185 Tags
f9a49b0cad3eeda68ed1751a42f7af91c742bc18
Commit Graph

16048 Commits

Author SHA1 Message Date
drh
10c9ef65fa Small performance improvement in the EXISTS-to-IN translator for the 
common case where the EXISTS operator is not found in the WHERE clause.

FossilOrigin-Name: dcb7772d7695ddbc0fe89e06c07ff4a6ae4fa05de914e2ec10b5cc07a62ed49f
 2021-01-15 14:25:06 +00:00
drh
19f9cd73ff Merge the latest trunk enhancements into the exists-to-in branch. 
FossilOrigin-Name: 13c4c9088cc8a2426e30a2ad1e9b9969407249281c6ed16653d43a0e6852a2e4
 2021-01-15 14:15:31 +00:00
dan
76cac6ef06 Add simple tests (and a fix) for the change on this branch. 
FossilOrigin-Name: 897f3f40267dc922f0fda287484435e1fd8709bade3e87c3829e2f945bb5e4aa
 2021-01-15 11:39:46 +00:00
dan
6bfc167a67 Allow the planner to convert an EXISTS(SELECT...) expression in a WHERE clause to the equivalent IN(...) expression in situations where this is possible and advantageous. 
FossilOrigin-Name: 9f90a88221d0694951c353e58efce342eb0b868b8ca6a4469c8205e5c7855b24
 2021-01-14 20:50:40 +00:00
drh
5870dc80f9 The early-out of the inner loop on the min/max optimization was overly 
aggressive for the cases where there is a join and outer loops contain
IN operators.  Fix this.  Test case in TH3.

FossilOrigin-Name: ccd3bae14b6b47bb0f9622700c04db989f76ce65e10e0709964cfd0675eca762
 2021-01-14 00:53:14 +00:00
drh
5e5683ae46 Fix a harmless compiler warning. 
FossilOrigin-Name: 83ec01e38cbd22147ba544e15eae32c72e0523a55b54851e483dc2effc64f206
 2021-01-13 21:05:07 +00:00
drh
af7b76534b Expand the number of optimization-disable bits from 16 to 32. Use one of 
the new bits to disable the min/max optimization, so that we can more easily
verify that we get the same answer both with and within that optimization.

FossilOrigin-Name: fd0c9a123b58b7b134ed67f26dbb4196b61e56227f078422cc7e9a3497054c2d
 2021-01-13 19:28:17 +00:00
drh
d193057ad1 Further enhancements to the min/max optimization of 
[/info/b8ba2f17f938c035|check-in b8ba2f17f938c035] to fix the performance
regression identified by
[forum:/forumpost/623f571482|forum post 623f571482].

FossilOrigin-Name: 188772a1dbaf066fbddd39c718fdd87478b19a920622f4640bcb79d4ef065331
 2021-01-13 15:23:17 +00:00
drh
aa556b0fa7 cli: Omit surplus whitespace at the end of lines in .explain output. 
FossilOrigin-Name: 11e4eb095746602961a178044809a68a77ba7b367596997bef726e54062423d9
 2021-01-13 12:59:20 +00:00
drh
b9366f8e32 In the .selecttrace output, show the ORDER BY clause added by the Min/Max 
optimization.

FossilOrigin-Name: db0ecfe66433f8915b6eb16d3735a4a0d0f8e0bbc395bc9c1364387506fc4657
 2021-01-13 11:44:51 +00:00
drh
2053f313bf Lexer and grammar rules for a RETURNING clause on DELETE/INSERT/UPDATE. 
Actually making this work, though, will involve a lot more code which will
likely slow down processing for the common case where there is no
RETURNING clause.  Furthermore, RETURNING seems to be of limited usefulness
and it is not standard SQL.  So we abandon it here.  These experimental
changes are parked in a branch as an historical reference.  If circumstances
changes, we might take up the cause again some day.

FossilOrigin-Name: abf8da815646055df5b871d54b99994c1470182dee7952fc5fd627e4379406cb
 2021-01-12 20:16:31 +00:00
drh
21d4f5b53a Fix a potential use-after-free following an OOM in sqlite3ParserAddCleanup() 
and add a mechanism to detect situations where this might occur in the
future.

FossilOrigin-Name: 38ef8ab9830e12acd2c710e113939b1f8dced02612c6933c37a3c948a4030d0a
 2021-01-12 15:30:01 +00:00
drh
cf3c078f93 Add a linked list of ParseCleanup objects to the end of a Parse object and 
use that list as a place to put other sub-objects that need to be deallocated.
Have a single such list for infrequently used sub-objects is more efficient
than doing an a separate check for each kind of sub-object.

FossilOrigin-Name: affa2b7b316941b8a6c4d0d1ff212c81a593faf1d05d129e14d2b70d73a25c59
 2021-01-11 20:37:02 +00:00
drh
a6e6cf2c8f New CLI command: ".stats vmstep" enables the display of the virtual-machine 
step count only, after each command.  Useful for optimization problems.

FossilOrigin-Name: 49dfce469e6a17111b349e53578479daf783064200bf0eec5bf8a91d3553b19f
 2021-01-09 19:10:04 +00:00
drh
4ee492f176 More detailed compile-time testing before attempting to use atomic load 
intrinsics.  See
[forum:/forumpost/fc0237a39b30ac0a|forum post fc0237a39b30ac0a].

FossilOrigin-Name: 5204c2c4a7b73a64764b0d2d1d7c53709bb64e0d2685a829c7bf31af13bab5e7
 2021-01-09 18:24:33 +00:00
drh
c2dbf35f49 Fix harmless typos in comments per 
[forum:/forumpost/7849e58dd5|forum post 7849e58dd5]

FossilOrigin-Name: d1e22e2f76cce7eb9f9029646176daef2d9e41c7bb1d3e1da182fbdd0096605c
 2021-01-07 16:10:14 +00:00
drh
c8af879e5f Avoid allocating space to hold the prepared statements for CREATE statements 
when parsing the schema of an existing database, since those prepared
statements are never used..  This helps to make startup faster,

FossilOrigin-Name: d01e9f2d00dc439c529cd8885a219fcddbaad73b9f471b020e2a0c18e2add69b
 2021-01-01 22:06:17 +00:00
drh
630fc34c1a Faster and smaller test to ensure that the sqlite_schema.sql field is always 
a CREATE statement of some kind.

FossilOrigin-Name: 76de2bb04b1c02a6c0300cd61d9b3d2477d845aa0d1cdb9dbe4f354b9fedd923
 2021-01-01 21:02:37 +00:00
drh
37114fbfcc Change the unions of the Table.addColOffset field from characters to bytes. 
This makes the query that implements ALTER TABLE ADD COLUMN more complex and
slightly slower, but also makes CREATE TABLE statement parsing faster by
avoiding a call to sqlite3UtfCharLen().  Since, CREATE TABLE parsing is far
more common than ALTER TABLE, this is a net win for performance.

FossilOrigin-Name: 6f25f2529f1495a26129d7d407979906e4962b2de351f901d41cb037d05ba780
 2021-01-01 20:04:34 +00:00
drh
3e992d1ab7 Use the column name hash to improve performance of column name collision 
detection while parsing CREATE TABLE statements.

FossilOrigin-Name: d02820f03575e4633a7917427f11c19f99bd7b92f37d0ffe6fdc2418ad729813
 2021-01-01 19:17:01 +00:00
drh
88efc796c2 Size reduction and performance increase in sqlite3Prepare(). 
FossilOrigin-Name: 41f45c8e894f48049325ccfef12cec0887b636bfad5d531a47628eb9e8612924
 2021-01-01 18:23:56 +00:00
drh
e2b0a12d58 Small size reduction and performance improvement in sqlite3VdbeMakeReady() 
by linking the new prepared statement into the prepared statement list sooner
rather than later.

FossilOrigin-Name: 2996e800a02967f9d0e27c816cf0b7b581a25634f94abcf167f27b019e1515e5
 2021-01-01 17:01:33 +00:00
drh
69e856ae66 Streamline processing of the authenticator callback for the common case 
when there is no callback.

FossilOrigin-Name: d3196685d958bf22b5c362e96bbf8e1df58cc09cc3abc4bfa94bb33bc28c61aa
 2021-01-01 16:43:26 +00:00
drh
4fd4a7a1e9 Do not attempt to take a pointer to the ceil() and floor() functions as 
those routines are intrinsics on some versions of MSVC.

FossilOrigin-Name: e5d7209e118a84537a85c0c9cd2b7ca4cd6ccf04181dc840b19339b4c93840cd
 2021-01-01 01:44:06 +00:00
drh
a06eafc8fc Do not set the P3 parameter on OP_RowCell when copying an index btree, as 
P3 is not used in that case.

FossilOrigin-Name: eef070a4aadf02a845d0ed00767be049d3b76e811e24797a116776fa836d1b03
 2020-12-29 15:06:26 +00:00
drh
277a30d9ce Fix missing comma in ctime.c that would cause the ENABLE_MATH_FUNCTIONS 
output rw to merge with whatever row followed.  Problem reported in
[forum:/forumpost/aacac97680|forum post aacac97680].

FossilOrigin-Name: 328bc4a01dd67096be49c8b5a656109ad2839a7959d1b00c02a96bfbcb44ec18
 2020-12-28 21:42:38 +00:00
dan
7225bfef16 Fix SQLITE_OMIT_WINDOWFUNC builds by moving declaration of sqlite3ExpandSubquery out of "ifndef SQLITE_OMIT_WINDOWFUNC" block. 
FossilOrigin-Name: 9587fa8b29fc2f91d751a71b909f574014656f24d276b4974f47fcc18dbadcb8
 2020-12-22 20:35:22 +00:00
mistachkin
9a60e716f7 Fix a couple spelling typos in comments. 
FossilOrigin-Name: 907ddf86766ebdbe39bdc89543c1a7bbd65c710c9f3a3a4d796845b2c02b711b
 2020-12-22 19:57:53 +00:00
dan
f39168e468 Fix a problem handling sub-queries with both a correlated WHERE clause and a "HAVING 0" clause where the parent query is itself an aggregate. 
FossilOrigin-Name: f62f983b56623f0ec34f9a54ce1c21b013a20399162f5ee6ee43b23f10c2ecd5
 2020-12-22 16:23:29 +00:00
drh
06ddb08f3f Simplification to the aggregate-function analysis error detection logic at 
the end of sqlite3Select().

FossilOrigin-Name: 82884438e30ad8241f8249927fe92e0856d78b64d7ade38f3d5bb1c931d958d0
 2020-12-22 14:54:20 +00:00
dan
961a72601b Fix problems with joining UNION ALL sub-queries against other sub-queries that contain LEFT JOIN. 
FossilOrigin-Name: d554f710a5abbe64022f47a14ef67227c861a8f0991d85d240434e9a709cf8b8
 2020-12-21 19:50:10 +00:00
dan
a3d33ebe4a Fix a problem when flattening joins between a UNION ALL sub-query and another sub-query that uses more than one window function. 
FossilOrigin-Name: ef9733fe1c6b31849a5da1037d21915f82e0e4ab42d1a23ead8a121012f1bace
 2020-12-21 18:39:58 +00:00
drh
6d5f928d22 Enhance documentation to show that "ro" is the correct way to say "readonly" 
in the mode= query parameter.

FossilOrigin-Name: 788b96851d9ced84757c48dc3e0414cab27ee7e50e9730dab30b2e42a7762397
 2020-12-21 14:51:33 +00:00
drh
8e2b9c2a89 Always declare the sqlite3WhereTrace variable, even for non-debug builds. 
FossilOrigin-Name: 88d93ee380b6fd87474545f20ade874ba05c784c787ce9c45ebfcffed3795308
 2020-12-20 14:51:17 +00:00
drh
e69ba68363 Allow UNION ALL sub-queriesto be flattened even if the parent query is a join. 
FossilOrigin-Name: df1d6482f9e92dafdca1948e96eef52d8646eef9c356394afabe431d6357dd34
 2020-12-19 13:58:06 +00:00
dan
d131b51cbd Fix for the previous fix in the case where a UNION ALL sub-query is joined against some other compound query. 
FossilOrigin-Name: 63c5cfb9ae8f4598a523bed2a60c0e69172179952961a573113fcf756c06551d
 2020-12-18 18:04:44 +00:00
dan
964fa26e0c When flattening UNION ALL subqueries into a join query, ensure that separate cursor numbers are used for each segment of the newly flattened query. 
FossilOrigin-Name: c510377b0b052e400f2ee4f20220b61cdf74ee44b9bb9e6490787c88dd4c55aa
 2020-12-18 16:13:39 +00:00
dan
9353beaff1 Fix a part of the header comment for flattenSubquery(). 
FossilOrigin-Name: dc0937ce9d5569e3409b2b036a9f15b896125f4eb2eec30e3f0bbe4a92bcd0ad
 2020-12-17 17:17:12 +00:00
dan
8daf5ae2ed Add test cases and minor fixes to this branch. 
FossilOrigin-Name: 5d6dc29d5f81738b07e4fee652fb2343fc409c2545f2f4667e8ee82d1a75f721
 2020-12-17 16:48:04 +00:00
drh
18a4bbdf63 In the CLI, add the ".filectrl data_version" command. And put the various 
".filectrl" subcommands in alphabetical order.

FossilOrigin-Name: 3434452148eef39ba3ba2f40a6fedb6ec4f5157cbc2763b3ec90ec7f2b126382
 2020-12-17 15:17:42 +00:00
dan
13dd0228d3 Fix a problem with sqlite3_expanded_sql() that could occur with statements that use both numbered (e.g. "?1") and unnumbered (i.e. "?") parameters. 
FossilOrigin-Name: 2a6cd6833e44dd6a2ac388815f43be6508f6fa6db5e451e964276a6c87e6c5ae
 2020-12-17 11:24:26 +00:00
drh
0a8b6a9f8f Enhance the sqlite3BtreeTransferRow() routine so that it does more careful 
checks for corrupt database pages.

FossilOrigin-Name: 85952e71175dae73c4e587a3b80783825d91fe8567a819e072da651c1ff4131b
 2020-12-16 21:09:45 +00:00
dan
de9ed6293d Allow sub-queries that use UNION ALL to be flattened, even if the parent query is a join. Still some problems on this branch. 
FossilOrigin-Name: 00e4bf74d3dfb87666a2266905f7d1a2afc6eb088d22cfd4f38f048733d6b936
 2020-12-16 20:00:46 +00:00
drh
e5baf5c283 Remove an unnecessary and incorrect #ifdef. Fix harmless compiler warnings. 
FossilOrigin-Name: 31cd1bbfa5b06723288d99d1cb423f88353bdef770b82e9103f71a796d66f660
 2020-12-16 14:20:45 +00:00
drh
9463d79353 Fix a typo in the sqlite3_free_filename() documentation. 
FossilOrigin-Name: 48301edc90fe5811df0394b106edce7726d0ea86ac562c9f4db511b812a76433
 2020-12-16 13:17:32 +00:00
dan
7f60706691 Fix another integer overflow triggered by a corrupt database in recently modified vacuum code. 
FossilOrigin-Name: 4e2dd2a53364f1fed48b995fd5d2642472585f6da5e4735e9da193ba7ff45514
 2020-12-15 19:27:20 +00:00
drh
9f023ce539 Enhance UPSERT so that it allows multiple ON CONFLICT clauses and does 
not require a conflict target for DO UPDATE.

FossilOrigin-Name: 6b01a24daab1e5bcb0768ebf994368d941b1dfc217bf6b661211d900331e68cf
 2020-12-14 15:39:12 +00:00
dan
59964b4010 Fix an integer overflow problem in new VACUUM code. 
FossilOrigin-Name: 59b4367fd852ba1bfefdff99a27b11657495a3f114ed6f85fdcf6c532f4a19fa
 2020-12-14 15:25:14 +00:00
drh
1c19848386 Minor changes for test coverage. 
FossilOrigin-Name: e5a8fa50f4e5e5c24664452eda4af80904f75e5123b8f84353347dbd505d416d
 2020-12-14 13:52:03 +00:00
drh
255c1c159b New test cases with corresponding bug fixes. 
FossilOrigin-Name: f22c21a94ca4cad0217f91c1a5a275bc348cb6ba0f3a54c927533bc8d8c96a90
 2020-12-12 00:28:15 +00:00