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05980f59312fdb9b51a3d1717c4f4d22195b6328
Commit Graph

141 Commits

Author SHA1 Message Date
drh
d2c737f2e4 Remove a branch that cannot affect the outcome from FkNoAction processing in 
fkey.c.  Replace it with an assert().

FossilOrigin-Name: 023a9dbe83c0042e9d500e3ae6c0592a468982e4ac278d08c9201967506c7555
 2023-10-21 20:34:57 +00:00
dan
17c3408e0e Add the SQLITE_CHANGESETAPPLY_FKNOACTION flag to sqlite3session.h, for passing to sqlite3changeset_apply_v2() to cause all foreign key constraints to behave as if they were declared NO ACTION. 
FossilOrigin-Name: fc9f82ea084159eaf3dd1757b96d17d1201b00c4e06455a7dcd8067172b25f28
 2023-10-20 17:06:39 +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
drh
2142b7c0a6 Avoid double de-quoting of table names when processing RESTRICT actions 
in foreign key constraints.
[https://bugs.chromium.org/p/chromium/issues/detail?id=1405220|Chromium 1405220].

FossilOrigin-Name: bb2b5ab172f0751c00343facf36fb12db10c88220caece31849f2711f12293d9
 2023-04-14 00:20:16 +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
dan
b192970809 Fix a problem with "ON DELETE RESTRICT" and "ON UPDATE RESTRICT" foreign keys in attached databases scanning child tables in the wrong schema. 
FossilOrigin-Name: 04d5b637f087520cd58211505f9b5c086ff96d864a1908f60464b6fe22c62b7d
 2022-04-16 15:46:23 +00:00
drh
36d2d09023 Use unpacked keys for OP_Found in foreign key processing. 
FossilOrigin-Name: 328dc76657eb5317f0201859d2b3abe6918103b894f7beaed0aca3058a9f2b64
 2022-04-04 18:17:59 +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
44a5c0257f Clear the cache of triggers used to implement CASCADE foreign key constraints 
whenever the schema changes.  Fix for the problem identified by
[forum:/forumpost/2831335356|forum post 2831335356].

FossilOrigin-Name: 5232c9777fe4fb13e1ecfe5b5d644e2c45d0514f95884dbed49a03fb9b67304c
 2022-01-02 12:01:03 +00:00
drh
477572b9f1 Protect access to the Expr.y union using nearby assert()s and branches. 
FossilOrigin-Name: 87e2f5eb436fc448427b0e24fb70f29688796b513b8c7b12f1a21540dae1e56d
 2021-10-07 20:46:29 +00:00
drh
78b2fa8610 Protect every access to the Table.u union using a nearby assert() or branch. 
FossilOrigin-Name: 50e08338aed7ac0cee600098d2ecd4b3b7bfd31a597bb26773badf3d2e2582c8
 2021-10-07 12:11:20 +00:00
drh
65b400931d Store the collating sequence name for each column of a table as an 
extension to the column name, for an additional savings in the heap space
needed to hold the schema.

FossilOrigin-Name: 832ac4c1ee384be0de72a4bdd55ed87e0f8294e7df5eefcf6b4942db3d85a69e
 2021-08-05 15:27:19 +00:00
drh
76f2477531 Improved harmony with the reuse-schema branch. 
FossilOrigin-Name: cbc703f70d16de0e93b276528fc761290f30af770ceb4b4d11d6a6e6506ac67c
 2021-08-03 18:45:41 +00:00
drh
cf9d36d1b3 Refactor field names in the Column object, zCnName and zCnColl, to make them 
unique and thus easier to find amid all the other code.

FossilOrigin-Name: 8b781dcaf68e0cf12a844708c82eee00193e340195cbca915d077e4846983bf3
 2021-08-02 18:03:43 +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
79cf2b7120 Refactor the way that DEFAULT expressions are stored on columns, in order 
to save memory in the common case where the column has no DEFAULT clause.

FossilOrigin-Name: 8646547e54211d44c415663c33775c4268550f8332949c4731a4bb6ec9cc663a
 2021-07-31 20:30:41 +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
dan
7937f63220 Avoid doing any foreign-key constraint related processing for an UPDATE statement that does not modify any columns that are part of FK constraints, even if the table has a self-referencing FK. 
FossilOrigin-Name: 7f3b036e730153ac22933b03a52d4ec3978c9ecab1399d8cc79fe533893321e3
 2021-02-03 14:20:56 +00:00
drh
dac9a5f7df Allow "*" wildcards in the RETURNING clause. 
FossilOrigin-Name: b0e3ae303db2a035583a05848ab7977e612d7e40c77e31ea9e0166de443c901f
 2021-01-29 21:18:46 +00:00
drh
b835247954 Working prototype. 
FossilOrigin-Name: b7ef4dc21f187ff4ff679e823782535188c3814aa6ce720b3a01c6d3ba4ef9f5
 2021-01-29 19:32:17 +00:00
drh
08b9208660 Fix harmless compiler warnings that surface in newer versions of GCC. 
FossilOrigin-Name: 9d670a318381f219b467653f5f9539097808b887ae37291ce13be462dedfb18d
 2020-08-10 14:18:00 +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
9c6a92982f Fix a harmless compiler warning. 
FossilOrigin-Name: f0ebea35d9d6b69a7bb4242fb79ff3db4267e429855fa6969f9f52ffee1c7a99
 2019-11-01 18:52:09 +00:00
drh
bc4974c81b The SET DEFAULT and SET NULL conflict resolution actions for foreign key 
constraints should cause an error when they appear on a generated column.

FossilOrigin-Name: b47513d2b32b61ba42c1e9b59287d28f6fee231e6c65de2a3aa19effbbaf1e7f
 2019-11-01 17:31:27 +00:00
drh
dc2e331ab2 Add another missing column number translation to the foreign key logic. 
FossilOrigin-Name: 32df5edcfef2605009f45d6ef1b97c63a99df07c7b4e00dc70f93001cfb8d81f
 2019-11-01 16:08:20 +00:00
drh
f09a14fbc3 Add missing column translations to foreign key logic. 
Ticket [c28a01da72f8957c]

FossilOrigin-Name: bc6a43e7ee6353b9ef3dea4309c77e170a1c798eefcfaa7636bf5a93e51c47ee
 2019-11-01 12:14:30 +00:00
drh
a1a01ffb5e Fix the foreign key logic to be compatible with generated columns. 
FossilOrigin-Name: 3de57145a18c62ff9b556c7218d8b276000d0052e4890212fa9335235f22d03c
 2019-10-23 00:31:01 +00:00
drh
31f69626df Performance optimization to the lookaside-memory disabling mechanism. 
FossilOrigin-Name: 17ce1c49cb0ed6fdd8c7c33431bc2afa217f1092c99b8dd608890a8e7aec7fb1
 2019-10-05 14:39:36 +00:00
drh
1194904b81 Refactor field Expr.affinity into Expr.affExpr to avoid confusion with other 
fields and variables named "affinity" and display affExpr it in
sqlite3TreeViewExpr() output.

FossilOrigin-Name: a29f2a7d07beff64e489e8f824babc6228c4a499fadc0ee701caa60a63baadcd
 2019-08-05 18:01:42 +00:00
drh
55f66b341a Add new assert() statements in an attempt to help static analyzers avoid 
false-positives.

FossilOrigin-Name: 9e66458592d40fbd96ea5f21339573110ca1cfe328238a020c9420a87d35dd72
 2019-07-16 19:44:32 +00:00
drh
d5c851c1cb Streamline the processing of the AND operator. Slightly smaller and faster. 
FossilOrigin-Name: 7713996aa99ce6dd35b5a2db74dd26658fb8d9817169b2a7531cdef6edb41403
 2019-04-19 13:38:34 +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.

FossilOrigin-Name: df08d472b090b212fb77ce2aae0e1ffe79ae5db4b1accf55e6fdb18e8b0a7098
 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*.

FossilOrigin-Name: 4a0929ac76d8aa5dd65eac3b83d6bbf41e505e01d175ca0fb2b19ba02d439415
 2018-12-29 02:26:59 +00:00
dan
e46201e264 Fix a bug in the code that detects self-referencing rows as part of foreign 
key processing. Fix for [50d2a6c2].

FossilOrigin-Name: 16fff05347f42fe9fa0f3150290b98b59a9bb921e49dc07ca397aa1de7a7e17d
 2018-12-20 17:32:33 +00:00
drh
eda079cd2c Combine the Expr.pTab and Expr.pWin fields into a union named "y". Add a new 
EP_WinFunc property that is only true if Expr.y.pWin is a valid pointer.
This reduces the size of the Expr object by 8 bytes, reduces the overall
amount of code, and shaves over 1 million cycles off of the speed test.

FossilOrigin-Name: ad130bb86e74e6ce165fdbdce3a19699510f0e62071c1c7923b5a4538d888c7c
 2018-09-20 19:02:15 +00:00
drh
9a047bb881 Remove an unused branch in the FK logic. 
FossilOrigin-Name: 523ff77925f1da361cf31e3fc82bcb1708ed356a2391430ab14ef620c9bf2327
 2018-07-22 00:45:11 +00:00
drh
4031bafafb When compiling with SQLITE_DEBUG, add run-time checks to ensure that no 
statement aborts unless either there have been no writes or else there is
a statement journal.

FossilOrigin-Name: 5a4542dbcf17a9f7fed600897555c271e1651fd50eb41d0b126725b486e1d14c
 2018-05-28 17:31:20 +00:00
drh
8c0833fb21 In the parse tree, combine LIMIT and OFFSET into a single expression rooted 
on a TK_LIMIT node, for a small code size reduction and performance increase,
and a reduction in code complexity.

FossilOrigin-Name: 3925facd942c9df663f9b29b1e6f94f6be14af8c2b99eb691bfc836b4c220826
 2017-11-14 23:48:23 +00:00
dan
3b61ebb8de Omit some extra code from non-SQLITE_ENABLE_UPDATE_DELETE_LIMIT builds. 
FossilOrigin-Name: 72be33f9c84de3ec4afc40549482417456ca82c1d16b473dc034b144055271e5
 2017-11-10 20:13:14 +00:00
dan
c456a76fb3 When generating individual loops for each ORed term of an OR scan, move any 
constant WHERE expressions outside of the loop, as is done for top-level
loops.

FossilOrigin-Name: e4a022be4b069b08cfdfda5295461676b99d28e17bbbedfbcb362dec69de59bd
 2017-06-22 16:51:16 +00:00
dan
940b5eaa5e Avoid updating unaffected indexes on a table as part of an UPDATE that requires 
foreign key processing in some cases.

FossilOrigin-Name: 477bea9ed0dd0fa69896bfd16d9b1d22170cbab784e3279ce65c29c47e032f34
 2017-04-11 19:58:55 +00:00
drh
79df77821a Refactor the Table.nRef field as Table.nTabRef for easier grepping. 
FossilOrigin-Name: 9cae4c2e300e20304ced0dc8c1415c4922185928
 2016-12-14 14:07:35 +00:00
dan
68a494c06f Fix a problem causing SQLite to return false "foreign key violation" errors 
when there is a partial (i.e. WHERE constrained) UNIQUE index on the parent
key columns. This bug did not cause SQLite to allow illegal data to be
inserted into the database, only to reject legal operations.

FossilOrigin-Name: 850877d1ea43104cc215353414b870c340acced2
 2016-12-13 16:57:49 +00:00
drh
abfd35ea03 Performance improvement and size reduction in the Expr node allocator 
function sqlite3PExpr().

FossilOrigin-Name: 2a81763e68cdf9b8c46389b1e1a87bc2084b53e7
 2016-12-06 22:47:23 +00:00
drh
e1c03b6233 Use sqlite3ExprAlloc() instead of sqlite3PExpr() for leaf nodes in the 
expression tree, where appropriate.  This is both smaller and faster.

FossilOrigin-Name: afac0709cec577a7851e3711730712cf12eeb6af
 2016-09-23 20:59:31 +00:00
drh
69c338263a Rename the Db.zName field to Db.zDbSName to make it more descriptive and to 
distinguish it from all of the other "zName" variables scattered throughout
the code.

FossilOrigin-Name: 92a22f01343a898455fd61c3b8e7d7c954f5b569
 2016-08-18 14:33:11 +00:00
drh
0b2c140a4d Fix a memory leak when a WITHOUT ROWID eponymous virtual table is used. 
FossilOrigin-Name: 31b83a7d7e553163eb186fc966a885f237554ec2
 2016-06-03 18:21:04 +00:00
drh
3875a96ad9 Remove a redundant test for disabling RESTRICT with defer_foreign_keys=ON. 
FossilOrigin-Name: 9cdf813c6aaaddc01d2d4e04636c83fcda04d971
 2016-03-30 14:17:36 +00:00
drh
2606aca80f Merge recent enhancements from trunk. Default page size is 4096. Writes 
to statement journals are avoided.

FossilOrigin-Name: 456df3365e2df60e34762f2024bb551538b3f72b
 2016-03-04 16:42:43 +00:00
mistachkin
9d970c3c93 Small optimization in FK handling. 
FossilOrigin-Name: e0d25913b73a813f5987aa70b364b00f19351663
 2016-02-25 21:38:28 +00:00