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Commit Graph

434 Commits

Author SHA1 Message Date
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.

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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.

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

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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.

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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.
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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.

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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.

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2021-01-31 15:50:36 +00:00
drh
d086aa0a48 RETURNING works even if "PRAGMA count_changes=ON" is set.
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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.

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2020-08-14 20:04:26 +00:00
dan
a7f82d9f47 Merge latest trunk changes with this branch.
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2020-07-13 18:04:27 +00:00
drh
1e32bed3c1 Further refactoring of the schema table name.
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2020-06-19 13:33:53 +00:00
drh
85bd353ac2 Earlier detection of index corruption caused by missing index entries.
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2020-05-05 18:42:49 +00:00
dan
69887c99d4 Allow a FROM clause in UPDATE statements.
FossilOrigin-Name: f353a1a613bb7ad8cedcda377a7fe6fd05ee03b1f50665b00b84a868a71c5bec
2020-04-27 20:55:33 +00:00
drh
dc4f6fc099 During byte-code generation, strive to avoid jumps that merely jump to the
following instruction.

FossilOrigin-Name: bcf876e67e75f6709f2b25683a3952bbbb87c672bb9d7af456feebc0ab9f6c31
2020-02-07 19:44:13 +00:00
drh
070ae3beea Break out the test for writable shadow tables into a separate subroutine.
FossilOrigin-Name: 8ad34d36a141fa8f5d9bd784dfeb892c983897a6dc6b867607cc668508acf944
2019-11-16 13:51:31 +00:00
drh
39b30a7d6b In sqlite3GenerateIndexKey(), do not attempt to reuse column values from
the previous index if the current index is a partial index as the partial
index test may have corrupted those values.  Ticket [a9efb42811fa41ee]

FossilOrigin-Name: 17e9f65814264de9c35bc5ba94e0a66fbbf1200c00d33ab9a19a0b6f92bc685a
2019-11-02 13:32:50 +00:00
drh
f09a14fbc3 Add missing column translations to foreign key logic.
Ticket [c28a01da72f8957c]

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2019-11-01 12:14:30 +00:00
drh
29c992cb04 Revamp the SrcList allocator routines to be methods of Parse instead of
being methods of the "sqlite3" object, so that they can leave better error
messages when the SrcList object grows too large.

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2019-01-17 15:40:41 +00:00
drh
ec4ccdbcb1 A new implementation of sqlite3VdbeMakeLabel() is faster and makes fewer
memory allocations by deferring memory allocation until 
sqlite3VdbeResolveLabel() is called, at which point the code generator has
a better idea of how big the relocation table needs to be.
The sqlite3VdbeMakeLabel() routine now takes a Parse* parameter instead of
Vdbe*.

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2018-12-29 02:26:59 +00:00
dan
f6e015fab9 Fixes for SQLITE_OMIT_VIRTUAL_TABLE builds.
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2018-11-28 08:02:28 +00:00
drh
e1857cc015 Performance improvement in subroutine that decides whether or not a table
is read-only.

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2018-11-07 16:46:43 +00:00
drh
0f0d3ddf71 Enable DEFENSIVE mode by default for tests. This requires lots of case of
turning DEFENSIVE off in order to dodgy things to the database for testing
purposes.  No all of those cases are yet handled, so "make test" does not run
to completion.

FossilOrigin-Name: a1d6c6712c3304fd736077432c8c180692cf7d79be7f3a073510b6dab0eb951f
2018-11-06 19:26:04 +00:00
drh
aef15e74c8 Turn on defensive mode for running test scripts. Does not yet work.
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2018-11-06 15:57:59 +00:00
drh
fc25721c9e Only allow shadow table to be written from within a recursive SQL call.
Omit the SQLITE_PREPARE_SHADOW flag.  Some tests are failing because the
tests depend on being able to write to shadow tables.

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2018-11-06 14:03:07 +00:00
drh
5a65470300 Add enforcement of read-only on shadow tables. This does not currently work
since some virtual tables are attempting to update shadow tables using
sqlite3_exec().

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2018-11-06 13:37:20 +00:00
drh
0f1c2eb5f2 Correct the internal logic for SQLITE_DBCONFIG_DEFENSIVE.
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2018-11-03 17:31:48 +00:00