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Author SHA1 Message Date
drh
33c2e37f98 Fix the empty-table optimization on INTERSECT so that it does not try to 
use an uninitialized register for LIMIT processing.

FossilOrigin-Name: 6918ada008507b4564ca0dc5f4f6818c49a42eb14a16285b2074e21dcc8f2c3f
 2025-07-09 20:11:49 +00:00
stephan
2ba5a93e8f wasm: DB.wrapHandle() no longer accepts a DB object as its first argument, as there's no apparent use case for proxying one DB object with another. Doc improvements for the new code. 
FossilOrigin-Name: 0ee19db02a9b9320681d4393d9ba52889d149eac8ee114fc7b7f52a57271c139
 2025-07-09 13:43:53 +00:00
stephan
6276637075 wasm: add a few tests demonstrating that oo1.Stmt.paramaterCount's new impl does not change visible behaviors. Add the c-pp-filtered files to 'make clean'. 
FossilOrigin-Name: 3fe61545967f82190011edb90b1be6a448b590555c7ba5f8e96494aeea8f88ce
 2025-07-09 13:13:01 +00:00
drh
8663a78ec9 Fix a possible user-after free following OOM in the EXISTS-to-JOIN 
optimization.

FossilOrigin-Name: 498ee8d514e64cdc93a8d68e1971b6326c6132daf25067936bec921c42494caa
 2025-07-08 22:11:39 +00:00
drh
aa12f0027b Adjustments to test/incrblob4.test so that it works on both Linux and Mac 
in spite of error message differences between those platforms.  Minor change
to termIsEquivalent() to provide 100% MC/DC.

FossilOrigin-Name: 720387f8604f7cd997f1850ed62ce6ab32608155d7f02a89c695041caafc4067
 2025-07-08 20:28:35 +00:00
drh
9a13a21223 New optimizations to detect early when queries return no rows due to 
tables being empty.  This includes the EXISTS-to-JOIN optimization that
tries to transform EXISTS constraints into additional terms of the FROM
clause.

FossilOrigin-Name: e33da6d5dc964db817d1bc63c9083aecd93d49ee14d5198600b47eaf7c5b9331
 2025-07-08 19:53:36 +00:00
dan
9b91aac83b Fix a problem with the fix in [5cb8e342e1]. 
FossilOrigin-Name: 043ff54fb746c54bc6cfa6aa8c8a32c876c09d36163125916ad01024b98d447b
 2025-07-08 19:02:26 +00:00
dan
acd1d93497 Fix another problem with running fts5 integrity-check in SQLITE_DEBUG builds, this one causing an assert() failure. 
FossilOrigin-Name: 5cb8e342e1d33a0fd04fd022900eeada46a2ee23f15c6abca1b37633e77429d6
 2025-07-08 18:44:56 +00:00
drh
449b34571e Enable the EXISTS-to-JOIN optimization if the outer query has no 
FROM clause.

FossilOrigin-Name: 1b9b124f9a35ebd1ac4ea70ef1ee08a4c82c11da690d4164f6b785a6fd9730d9
 2025-07-08 17:28:09 +00:00
dan
9615cf93c8 If SQLITE_DEBUG is defined, fts5 does extra checks as part of integrity-check. Ensure that errors from these extra checks are only reported if the other, normal, tests all pass. This fixes a test case in fts5corrupt3.test that was failing if SQLITE_DEBUG was defined. 
FossilOrigin-Name: 98a53fb276fa1fa733da2dd3255c35ce9f6af9b9feef6e76fb577b6d142167a2
 2025-07-08 14:54:20 +00:00
drh
925b79039c Fix test case results in FTS5 that were changed error message improvements 
in [48044a6b57c0a16c] but which were omitted from that check-in.

FossilOrigin-Name: e1f8e0240b14f1338e947634e840af785e5042a09cd365975e922a13a562f4cd
 2025-07-08 12:37:25 +00:00
dan
7fc6e6a272 Only run preupdate-hook tests in incrblob4.test if the preupdate-hook is enabled in the build. 
FossilOrigin-Name: 56314b6b53c86ae131f780e20b62bdeabccba6d62dda41becc1c4b2e87cee07b
 2025-07-07 20:47:23 +00:00
drh
8c8443a38a Small performance optimization in the resolver. 
FossilOrigin-Name: 840646df0696706bd4dd7a04dfc8b16ad80c24cbcbc57a22c9e65a93cc17af2b
 2025-07-07 19:03:50 +00:00
drh
44a03671c4 Merge the latest trunk enhancements and fixes into the empty-table-optimizations branch. 
FossilOrigin-Name: f15cdf07573c05276a13885d74bae21a93544766344f19ef939b7a69edd1073b
 2025-07-07 18:35:51 +00:00
drh
0a5508aeb4 Rework the fix to the problem described by 
[forum:/forumpost/b9647a113b465950|forum post b9647a113b] so that it
provides a more complete fix that covers cases that were not resolved by
the original fix, and so that it does not cause performance regressions.

FossilOrigin-Name: 28db0d152d90fb5e62d03ea5caceabe8901be98522aef3dc2b54564fbc35355d
 2025-07-07 16:19:44 +00:00
drh
4fe1ac8fe1 Simplifications to the row-value IN operator logic. Do not let the query 
planner accept a WhereLoop for a row-value IN operator that uses the same
index column more than once.

FossilOrigin-Name: d2adf61f21a3ce901a2b08199ad0de191e88ef16e097c5f7a75c95ad958eff12
 2025-07-07 15:40:53 +00:00
stephan
24d290e7b0 Work around the Emscripten 4.10 regression described in [https://github.com/emscripten-core/emscripten/issues/24656 | Emscripten ticket #24656]. Problem reported off-list by BrickViking. 
FossilOrigin-Name: c385475b250f3364507a95c5832137098a9bb7c7fc12ab3bb116e1fad7bb7645
 2025-07-07 12:11:26 +00:00
dan
8504d37b99 Avoid invoking the preupdate hook from within sqlite3_blob_write() if the cursor is already invalid. 
FossilOrigin-Name: 9f335b9a4e9e761a0c6afd6dc69665a24506141bde88530bf59fcbdf957ae881
 2025-07-07 11:37:55 +00:00
drh
4aacd1ef8e Back out the fix at [ba7d5bad32ad6aac] because it does not always work and because 
it causes a performance regression.  Add new test cases for row-value lookups of
indexes that contain redundant columns, three of which are currently failing.  This
branch is seeking an improved solution to the redundant index column problem for
row-value lookups.

FossilOrigin-Name: ad8ddcefab5cc526b1cd77731e00939c672e61ca83350d28961b67635d20da03
 2025-07-07 10:54:00 +00:00
drh
0840460689 Fix parser error introduced by [325e547a2195571e]. See 
[forum:/forumpost/095dbfc06e5b1f7e|forum post 095dbfc06e5].

FossilOrigin-Name: 4eefab44941fc6e17742fa49c8734e7f00a2177d82bc572e596228add53aad39
 2025-07-07 02:18:27 +00:00
stephan
240319decd Remove some dead JS code and some extraneous debug output from test code. 
FossilOrigin-Name: 6e73770a7f3845055e0130012d844c32c4a1bfdb87e8379c161e1a266a808143
 2025-07-06 15:36:28 +00:00
stephan
787f4c3f09 JS doc additions. 
FossilOrigin-Name: 7933505f0c1d25c6ee81ead8edc5ea649a84ec0582321bcf5ed4a17232750f90
 2025-07-06 15:13:06 +00:00
stephan
4d453cc2ed Experimentally add sqlite3.oo1.DB/Stmt.wrapHandle(), which allow DB/Stmt instances to wrap a (sqlite3*)/(sqlite3_stmt*) optionally with or without taking ownership of it. The intent is to enable mix-and-match use of the C API, the oo1 API, and any other hypothetical API which exposes those pointers. oo1.Stmt.parameterCount is now a property access interceptor like Stmt.columnCount is, but that doesn't change how it's used. 
FossilOrigin-Name: 1227543b87c3320d6b80e0f61b88ea53b68779966a0295c4d6a1db6369c48207
 2025-07-06 15:01:44 +00:00
drh
c701d17366 Improvements to the EXPLAIN QUERY PLAN output for EXISTS-to-JOIN. 
FossilOrigin-Name: 6b1ecbaa2ee405be040901dceac45d027d35c313622748ba4dbbd404e297a7fa
 2025-07-06 01:19:09 +00:00
drh
8bc112e3e4 Enhance the EXISTS-to-JOIN optimization so that it works on EXISTS subqueries 
that do not have a WHERE clause, and so that it works on nested EXISTS
subqueries.

FossilOrigin-Name: c1d5295724f9cf7f49e0786d28016eff2d268a2b670f934d24c76787626089db
 2025-07-05 23:33:21 +00:00
stephan
27408ab9c9 Add 'reconfigure' target to Makefile.in to re-run the configure script with the same flags it was generated with. 
FossilOrigin-Name: c60907e77b32824aaaf024d299cdaf161b5f64fc927ffe5d5455eeb5754e6b01
 2025-07-04 18:32:18 +00:00
stephan
d9eae6b75a Propagate the -ldl and -lpthread flags, if needed, into sqlite3.pc, per request in [forum:44a58c807353162f | forum post 44a58c807353162f]. 
FossilOrigin-Name: 64f5f14322349b47451b8cac03bf8cd6f1ae45a8822e7f1ddee3d0b265047501
 2025-07-04 17:20:37 +00:00
drh
45bc9b9f97 Merge fixes from trunk into the empty-table-optimizations branch 
FossilOrigin-Name: 6f98b16d210a9f5b6ca4b4599e3dab3263eddbae7c70ddbcabf988f4a1014e8b
 2025-07-04 14:24:18 +00:00
drh
e33ea17d24 Fix harmless compiler warnings. 
FossilOrigin-Name: 13af4acebe09b047756c22b800136cffaba532e7fcaa448a4edf4fedb94e9bbc
 2025-07-04 12:25:24 +00:00
drh
a12e92d2f7 Remove an ALWAYS() added by [960a8e6fc91f4] that turns out to be false 
in some cases of malformed SQL.

FossilOrigin-Name: cc8171461bf35f584888a24b844c8b79ad30155b19b61161e9f3abc276e8aae5
 2025-07-04 11:48:11 +00:00
drh
478dfc7e74 Do not allow the EXISTS-to-JOIN optimization if the EXISTS clause is based 
on a view, since that view might expand into a join.

FossilOrigin-Name: 872c41feddafcc21a02f1229ce017ceea9f8e309a4dd5b6e323477d67f975947
 2025-07-04 11:06:34 +00:00
drh
1b62720fa8 Improve the early-termination optimization so that it works in queries 
which use the LIKE optimization in the outer loop.

FossilOrigin-Name: b4e4d148243cfcb09aa0aaca30e83812b42e2780073e55c0e8c6e3da16243dfc
 2025-07-04 10:26:55 +00:00
drh
1e3a862b79 Merge the latest trunk fixes and enhancements into the empty-table-optimizations branch 
FossilOrigin-Name: d4f47e04f5880e99a53089e2dd5cde64a7ea44f059d9906b5d11324896546714
 2025-07-03 20:51:08 +00:00
dan
bd05edd98f Fix a few cases where LIMIT clauses that were part of scalar sub-queries on virtual tables were not being passed to xBestIndex methods correctly. 
FossilOrigin-Name: 960a8e6fc91f47add3a089dc6cef013109deadf809994c5149ad3bdfb3884de0
 2025-07-03 16:05:41 +00:00
drh
a24a397b8b Improvements to sqlite3_vtab_rhs_value() logging in the 
ext/misc/vtablog.c extension.

FossilOrigin-Name: 25131ee84f53dab1191e02c19cefd256aed2828c7edea325fcc0ba3b0a668583
 2025-07-03 15:50:18 +00:00
dan
0e6e05d4d5 Make the value of an explicit LIMIT clause on a scalar sub-query available to xBestIndex for simple "LIMIT 0" and "LIMIT 1" queries. 
FossilOrigin-Name: 33b6a63caafccc61b3193714911cd8b5dd9b7f1798054b8c7845b23688d531f2
 2025-07-03 15:32:27 +00:00
dan
c525e6e817 Make handling of LIMIT clauses in correlated sub-queries on virtual tables more efficient. 
FossilOrigin-Name: 7214cb2a5b35190a06a1040cd4c54f325d347f8d8e36a07fd76c0a421e266522
 2025-07-03 14:28:47 +00:00
drh
1ff6f19d8b Enhancements to the xBestIndex output from the ext/misc/vtablog.c 
extension.

FossilOrigin-Name: 8b31acc0b18f38eb4af6efebd1ea25cd65a146651101579aee20afd9ec6dc2de
 2025-07-03 14:10:03 +00:00
drh
bfb4993364 Fix an uninitialized variable added yesterday by [d27d34fb746280e7]. 
This problem was discovered overnight by 
[https://github.com/google/oss-fuzz|OSSFuzz].

FossilOrigin-Name: 6db4703f1178fc808f3a75c355fb6638fb12c88f6e1ce7f579e200ced8089114
 2025-07-03 11:52:17 +00:00
drh
debc8f7bb7 Minor tweaks to the exists-to-join optimization. 
FossilOrigin-Name: 9cb600ad576c68647ed943a0773019312c5f01c9c1ca9ff0bf1214b03a531b48
 2025-07-03 00:17:27 +00:00
drh
aa54d7a0ca Merge in the exists-to-join optimization that has been modified 
to relax the requirement of having an indexed join constraint.

FossilOrigin-Name: 1c1aef2b7feae29066d0330699ab634ef41f5b60cdcd479a60cb1a5409553138
 2025-07-02 20:46:02 +00:00
drh
eb27359e5e Fix VDBE coverage 
FossilOrigin-Name: ff593a16d61cc5c588d1737deb822abb90b1759475a4cabfcf608978b1191487
 2025-07-02 17:43:59 +00:00
drh
33f3273705 Early exit if one of the inner loops of a 3-way or larger join is an 
empty table.

FossilOrigin-Name: eaad6ac707a5960d9518d4049b7b1759e7512727ce87be3c402408144bda0a97
 2025-07-02 14:53:48 +00:00
drh
216676664d If the LHS for an EXCEPT or INTERSECT operator is empty, skip over the 
computation of the RHS.

FossilOrigin-Name: 13f096ae8a850a05d4a8684561066f11693ee66289e6568c44ef32822cca06f6
 2025-07-02 13:19:24 +00:00
drh
6245e5a46b Improve the bytecode for joins such that it exits earlier if it determines 
that no output is possible.

FossilOrigin-Name: 2d2b61cba44a756a3a41ef5c95bbb0c0b7111f4b679c578fec9bd0b214cca367
 2025-07-02 11:47:54 +00:00
drh
caf0473652 Ensure that Expr.op2 values for TK_AGG_FUNCTION nodes are adjusted when 
query flattening.

FossilOrigin-Name: d27d34fb746280e7e81335db4e195914b15403ef0da7b2955550553dd78fbe9a
 2025-07-02 02:03:43 +00:00
drh
2427ce16d9 Improved comments on bytecode used to implement aggregate queries, to aid 
in debugging.

FossilOrigin-Name: a1a8b85cdba64a17dcdcd4e6b42b872957cec2dc05b0ac34dfcd82f59344034b
 2025-07-01 23:17:36 +00:00
drh
46bfcc1a21 Improved byte-code comments for the short-circuit optimization of 
[0083d5169a46104a], to aid in debugging.

FossilOrigin-Name: 113f9d10e347eeaa893ff8b47a461009e0b12589374b93cf3e0bddd19c702dea
 2025-07-01 20:32:45 +00:00
drh
5e71497404 Cache and reuse virtual table cursors in the bytecode engine. 
FossilOrigin-Name: 2d187d4232d750cb1840f1d89c8aed65962cb0883c1d7f91c554b451e475c514
 2025-07-01 17:36:55 +00:00
dan
526399b0fd Avoid an assert() failure in fts5 that may occur when processing corrupt records. 
FossilOrigin-Name: 8afd6ca85724a69970181042d6aac53742ea2b76ded5966b2541c3afe1121fb9
 2025-07-01 16:21:47 +00:00