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Commit Graph

448 Commits

Author SHA1 Message Date
drh
fb0878ac38 Fix indexes on typeless generated columns that pull from REAL columns so 
that they correctly return REAL values.
[bugs:/info/2026-10-14T17:34:30Z|Bug 2026-10-14T17:34:30Z].

FossilOrigin-Name: 7408f90ecc2dd26aceb52f92de78b8e1521cb5a294d3231fd32a903afe1db41d
 2026-10-14 18:39:44 +00:00
dan
57ee077c5e Enable the optimization on this branch for indexes on expressions only. 
FossilOrigin-Name: 3576b6930436b3149c5033476f70518e9b4adeaeec2538a68b7dc599eb854c47
 2026-04-22 17:50:50 +00:00
dan
8606a52934 Detect and omit cases where an index key is being replaced with an identical key. 
FossilOrigin-Name: 7a01caf0d0864a462eb81b7643dcf89048f4ae56a29d762f0cfc38066218504f
 2026-04-22 16:58:36 +00:00
dan
8736da94bc Fix compiler warning an inefficiency introduced by previous commit. 
FossilOrigin-Name: 03058d73d3a88ab30e874b4231cc5b263b874a577f8bf5189a452d7376e25a47
 2026-03-17 11:22:51 +00:00
dan
022f2f96bc Change the sqlite3VdbeFindDeleteKey() routine so that all index fields that are not expressions or virtual columns must match the table for the delete to succeed. 
FossilOrigin-Name: eccd9fcfa7e34ddcdeb671544c6afac7aa0d4665c5e1df7c8e53c41387ed0386
 2026-03-17 11:17:54 +00:00
dan
b2006499c7 Fix a problem with the find-delete-key method on this branch. 
FossilOrigin-Name: 6f49b5ecad5d924999d045a1ade93d95e731182be1781aefa5bc763b6202e9c3
 2026-03-16 15:49:58 +00:00
drh
4b736ce2f8 More code simplifications. 
FossilOrigin-Name: 3d76732a45333f6f3e21667bb018a859d20815243d276fad0dc126d3c667d4aa
 2026-01-23 18:52:45 +00:00
dan
add73c831b Add the SQLITE_PREPARE_FROM_DDL flag to sqlite3_prepare_v3(). Use this to prevent fts3/4 tables in non-trusted schemas from calling unsafe SQL functions. 
FossilOrigin-Name: 26f39ac806a5582fab1497e38a4ce68dad2b79df8c8aade43c4e21eed7576931
 2025-12-22 15:22:02 +00:00
drh
7f0e0c7dbf New assert()s to help verify union access. No logic changes. Testing and 
validation code only.

FossilOrigin-Name: b7b64c53f5d7f6b405ee3f1f1be1d84230aa79db5a502c8ad78d3e524f4384fb
 2024-09-20 12:58:15 +00:00
drh
bb36d55e63 Fix minor comment issues. 
FossilOrigin-Name: c1bbed19f4348ec31c3cb4723eaa8f1554bb58ef4de7feb3a0f39612785f13d5
 2024-08-20 22:05:01 +00:00
drh
692c160360 Tighter checking of access constraints on union members in SrcItem. 
Improved invariant checking.

FossilOrigin-Name: fd72d3400a8fe5747f494eee81654698acee350bb95b9db269e87d857af03492
 2024-08-20 19:09:59 +00:00
drh
ff176231da Fix some stray SrcItem field name fixes. 
FossilOrigin-Name: bc5f5ce59e1e4323422bda7d002310923f927a03b4fd42749bf04f6c9853956b
 2024-08-20 17:41:44 +00:00
drh
b204b6aa7b Give unique names to fields in the SrcItem object, to facilitate analysis of 
how those fields are used using "grep".

FossilOrigin-Name: 9f5aeef3cbc2c95267c8f7bf60d5c66971a76789669fb0e8f853273ff6f616f2
 2024-08-17 23:23:23 +00:00
drh
8797bd695f Reduce the size of the SrcItem object by combining fields into a union. 
FossilOrigin-Name: a4c59ac3c6ec979c25b544d29e47b8e39f6439c098eed8f84b3bd506c9adf047
 2024-08-17 19:46:49 +00:00
drh
1f097a2f29 Add bit to sqlite3_test_control(SQLITE_TESTCTRL_OPTIMIZATIONS) that will 
disable the one-pass optimizating in DELETE and UPDATE.

FossilOrigin-Name: 22f6dd5cd32ed9e7b932fdba98aa8652fde999df79f4995d3d8ac1acf430cf53
 2023-07-31 17:39:36 +00:00
drh
c439b9e0c6 Avoid unnecessary calls to sqlite3DeleteTable() with NULL pointers. 
FossilOrigin-Name: 4a35f391995a88757d7b46f52bf241f523ee2a6a7b6726df00cddaec8cee7080
 2023-06-20 16:26:52 +00:00
drh
f6e04b6e29 Avoid unnecessary calls to sqlite3CodeRowTrigger(). 
FossilOrigin-Name: 27c174dbd0e7ba029d13fb005fc950ac99eb6aee31903ee3acfc88c262d13f6a
 2023-06-20 15:48:24 +00:00
drh
56a410741b Address various harmless compiler warnings from 
[forum:/forumpost/d526da8ee4|forum post d526da8ee4].

FossilOrigin-Name: 365caf2f97e8f15842f52536e8d05d359e9d6e863182e020ce14a9a9f27ee057
 2023-06-16 14:39:21 +00:00
larrybr
55be21647e Fix straggler misspellings and tidy the custom dictionary. Also include pickups from [forum:/info/c61fb09afd|forum post c61fb09afd]. 
FossilOrigin-Name: 8c291d99946eb32b20b743921202f9c7cfb716268ff526817b27adbb7942e40b
 2023-06-07 17:03:22 +00:00
larrybr
bc91738e66 Add a C-source spell-checking facility. make misspell (on Nix) 
FossilOrigin-Name: 26c1bb4bd9e9f56613c3aa87407a7f562fd4ebde5bfd6dece02078001d9a45f8
 2023-06-07 08:40:31 +00:00
drh
60fd5c34ab New assert() statements to verify that Expr.iColumn is never used as an 
array index when its value is negative.

FossilOrigin-Name: 6084c5fb6d3fcedf35cd6c597a44ec7bf8b4a2576c7b277e5342d2a7905318e7
 2023-05-17 15:46:46 +00:00
dan
32a5feb53e Avoid an assert() failure that could occur in SQLITE_ENABLE_UPDATE_DELETE_LIMIT builds when a WITH clause attached to an UPDATE or DELETE statement created a CTE of the same name as the table being modified. 
FossilOrigin-Name: 8edf56d1698c3db38250db3b25864f658488414efb3a6b3e1443283b6affd26d
 2023-05-17 11:31:51 +00:00
drh
3cbf38c783 Fix multiple problems with RETURNING on a DML statement against a view, 
all inspired by [forum:/forumpost/dc3b92cfa0|forum post dc3b92cfa0].
(1) Do not allow a RETURNING clause to trick the code generator into thinking
that the view being updated has an INSTEAD OF trigger.
(2) Generate all result columns for a view in a DML statement.
(3) The automatic covering index for a view should cover all result columns
of the view.

FossilOrigin-Name: c8bedef0d61731c29ae34de1594222d15b578f9e2cddbbd5b74fb3059644fe0f
 2023-03-28 11:18:04 +00:00
drh
ffcad5893a Disallow the one-pass optimization for DELETE if the WHERE clause contains 
a subquery.  Fix for the problem reported by
[forum:/forumpost/e61252062c9d286d|forum post e61252062c9d286d].  This fix
is more restrictive than necessary.  It could be relaxed if the subquery does
not involve the table that is the subject of the DELETE.

FossilOrigin-Name: 73f0036f045bf37193b6e87ae45b578c5831614c530488257c69666178da3aa5
 2023-03-15 17:58:51 +00:00
drh
41ce47c4f4 Add the new internal interface sqlite3DbNNFreeNN(db,ptr) where both the 
db and ptr parameters are guaranteed to be non-NULL.  Use this where
appropriate to save more than 2 million CPU cycles on the standard
performance test.

FossilOrigin-Name: e5eaa80e81fdf86f2875a912b880272b8d099b82b08e945a7988c5dd0fe9d6b5
 2022-08-22 02:00:26 +00:00
drh
00378fde23 Enhance the enforcement of SQLITE_VTAB_DIRECTONLY so that it applies to 
DML statements within triggers.  Do not allow DML stratements against
virtual tables within triggers unless either the virtual table is
SQLITE_VTAB_INNOCUOUS or PRAGMA trusted_schema is ON.

FossilOrigin-Name: 9433ea4070f52135be64569057f439e7bdb4b3f425d87167c9ebda50011210c1
 2022-08-20 19:33:04 +00:00
drh
058e99502a Small performance increase and size reduction by splitting out the 
sqlite3VdbeGetLastOp() from sqlite3VdbeGetOp().

FossilOrigin-Name: 92ac01d41d46ab73e189b1e5596ea63e5edb5b15639c5d7bdb981b95366c069b
 2022-07-25 19:05:24 +00:00
drh
d44f8b2385 Improved technique for parsing the ON and USING clauses of a join is faster 
and uses less memory.

FossilOrigin-Name: 158156a3e3d50042cafc75dea3aaaa68b1f2efb9c3d178518ea6e68e32e0d21c
 2022-04-07 01:11:13 +00:00
drh
2a7dcbfbb0 Attempt to show triggers in the TreeView output from DELETE, INSERT, and 
UPDATE statements.

FossilOrigin-Name: b0939d6f4d94b45dce53ace6295508a67d574cc72bd6977623bf77065b3c4e64
 2022-04-06 15:41:53 +00:00
drh
5e431bead8 Rename debugging defines and variables from SELECTTRACE to TREETRACE (and 
similar) since the functionality has how expanded to include data structures
beyond SELECT statements.  Should not affect deliverable builds.

FossilOrigin-Name: 393fa32e188a017f431372b54037cb31e885030542f00d0bfd59da9d9db5c014
 2022-04-06 11:08:38 +00:00
drh
f8ef2dbd7b Add additional tree display routines for DELETE and UPDATE. No changes 
to deliverable code.

FossilOrigin-Name: fbd288ff3d4ea47cd324b5952e7754a465901844f2d950f0860d4488d5b6eb9f
 2022-04-06 10:37:44 +00:00
drh
895bab3383 Give the virtual table xBestIndex method access to (some) OFFSET and LIMIT 
clauses.

FossilOrigin-Name: 74fa5757ee0a8499bcd6546dac1a3ecc6048ba9cff9e3e574e28e6e82e894a3d
 2022-01-27 16:14:50 +00:00
drh
0c7d3d399d Remove many redundant checks for sqlite3.mallocFailed now that any OOM should 
cause Parse.nErr to be non-zero.

FossilOrigin-Name: 1f7fa46126ea33ed30e93186aff3df51068aeb4be6f79a102bfe8c4e44941d71
 2022-01-24 16:47:12 +00:00
drh
3b26b2b56b Check for foreign key constraint errors prior to returning the results from 
a RETURNING clause.  See [forum:/forumpost/793beaf322|forum post 793beaf322].

FossilOrigin-Name: a818ba2ed635b91e279dde44236fc7446a33db2b46c9409b67021248c01bf4e5
 2021-12-01 19:17:14 +00:00
drh
dbfbb5a0c5 New assert() statements to protect the u1 and u2 unions of SrcList. 
FossilOrigin-Name: 9b91fbcfcc14048f7d0755d47d9b7f9212fa2eaa6f3c04f417fa16c3a47943bf
 2021-10-07 23:04:50 +00:00
drh
7061aa8977 Fix the build for SQLITE_ENABLE_UPDATE_DELETE_LIMIT. 
FossilOrigin-Name: 5150d2da06ab3c7e3bea1865413cd21c64d5cefb91d3d874e9dd0bf51aea754b
 2021-08-03 23:23:23 +00:00
drh
f38524d20d Refactor the Table object to reduce its memory footprint. 
FossilOrigin-Name: bbb6759bcf6e01d36dfc787a82a610d359f50aaeac8104b73883a84906d54e1f
 2021-08-02 16:41:57 +00:00
drh
21571a94c1 An index on the expression "likely(X)" should store the true value of X, 
even if X is a real number with no fractional part.  The optimization of
storing some REAL indexed values as INT (see [10d851353c2abead]) should
be omitted for index columns that are expressions.
[forum:/forumpost/3b940c437a|Forum post 3b940c437a].

FossilOrigin-Name: 791473bc6677c2ae76f558082a4b43ca1eaf9895b76624d5b55d58f2af898ff3
 2021-06-14 14:00:09 +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
dan
a4656e390a Fix a problem with UPDATE and DELETE statements that use both INDEXED BY and LIMIT clauses in SQLITE_ENABLE_UPDATE_DELETE_LIMIT builds. 
FossilOrigin-Name: cc2b4b38668bd32ebd8cf2e0d244eef2a6c7e0a1ee0a34c9c43eaf25c9cc09ae
 2021-02-25 18:23:39 +00:00
drh
a79e2a2d28 Materialize any CTE that is used more than once. 
FossilOrigin-Name: ba59159fbe6b83fb6d79fbfee22d983768b0ebbaac7e99d2ac66c810e5e04100
 2021-02-21 23:44:14 +00:00
drh
7601294ad3 Rename the "struct SrcList_item" object to the more succinct "SrcItem". 
This is a symbolic change only.  The logic is unmodified.

FossilOrigin-Name: bfd5bf2c73110fcb36db9ba2a949ff516131fbd3e89325f88fe9f5c2b4ed87b2
 2021-02-21 21:04:54 +00:00
drh
1862271f7c Performance improvement in resolving the INDEXED BY index name for the common 
case where there is no INDEXED BY clause.

FossilOrigin-Name: 554b286ac208168bde91c6c6034cc7087410def76fce650b519661b2ee2c61b7
 2021-02-20 21:20:54 +00:00
drh
18e5607211 New opcode OP_ChngCntRow used to output the result of PRAGMA change_count. 
Only this new opcode, and not OP_ResultRow, checks for foreign key errors.
Faster performance, and now also works with RETURNING.

FossilOrigin-Name: 154fc2b15465c7c92a1af0a93851421aec42a81bab54840a9701f2c78068e14e
 2021-01-31 15:50:36 +00:00
drh
d086aa0a48 RETURNING works even if "PRAGMA count_changes=ON" is set. 
FossilOrigin-Name: a9122d97577b239704cdee1a90a3b0dbff8bdf9dea2324d7315bd47238dcc8eb
 2021-01-29 21:31:59 +00:00
dan
a344ad47f3 Do not apply affinities when creating entries for automatic indexes on views. Fix for [95302bdb]. 
FossilOrigin-Name: df12f097224ebc9473d9e2a8933bd7efed6490d09af2c012c9b59a7892369b7f
 2020-10-03 19:16:36 +00:00
drh
68c0c71065 For UPDATE and DELETE, use OP_DeferredSeek always. If the seek must later 
be resolved, add the OP_FinishSeek opcode after all WHERE clause terms have
been processed.  This obviates the need for the WHERE_SEEK_TABLE and
WHERE_SEEK_UNIQ_TABLE flags to sqlite3WhereBegin() and the ensuing
complication, and it allows the covering index optimization to be used
further into WHERE clause processing.

FossilOrigin-Name: a495f60d315e34b1a1bc5fb1336e05047add52c8fb2710b577c97b10a5e734f6
 2020-08-14 20:04:26 +00:00
dan
a7f82d9f47 Merge latest trunk changes with this branch. 
FossilOrigin-Name: 5ee3c27e20d12a126fb773b428bb864102b949a5b26a8d5c523753dcedf4be10
 2020-07-13 18:04:27 +00:00
drh
1e32bed3c1 Further refactoring of the schema table name. 
FossilOrigin-Name: 9536fa0ae0c1ae6e2e98d2fa11e5acda7f3c9b8ca5061b6f7f8cae63a11d936b
 2020-06-19 13:33:53 +00:00
drh
85bd353ac2 Earlier detection of index corruption caused by missing index entries. 
FossilOrigin-Name: f339f31f9e9a856b576f99c5230fdf6d60fdc2873e48cb5aa0a4ab1d04e3c930
 2020-05-05 18:42:49 +00:00