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50 check-ins occurring around ad3ffa1a75a5a032.
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2022-03-07
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| 14:51 | Fix the code generated for vector IN operator constraints on virtual tables so that they work even if the "omit" field in the sqlite3_index_info object is off. This has apparently never worked correctly before. Presumably, nobody has ever before written a virtual table that can use vector IN operator constraints and that relies on bytecode to double-check the constraints. Test cases in TH3. Problem discovered by dbsqlfuzz cab8e26194a40147627094f3c6849c0a7b1e0310. (check-in: 21b656572d user: drh tags: trunk) | |
| 01:29 | Optimizations to sqlite3BtreeIndexMoveto() avoid unnecessary comparisons if the cursor is already near the end of the table and is not moving far. This case is more common that you would expect. The optimization saves almost 4 million CPU cycles. (check-in: 0057bbb508 user: drh tags: trunk) | |
| 01:28 | Fix the .import problem in the CLI reported by forum post 72a024c957. (check-in: d753285bcb user: drh tags: branch-3.38) | |
| 00:14 | Disentangle variable use in last checkin (check-in: 4c3a02600f user: larrybr tags: trunk) | |
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2022-03-06
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| 23:41 | For CLI .import, revert to importing into temp or main when given table is found there and no -schema option used. And plug an obscure leak. (check-in: bf9d127884 user: larrybr tags: trunk) | |
| 20:22 | Fix obsolete but harmless comments in btree. No changes to code. (check-in: 4838b888e4 user: drh tags: trunk) | |
| 17:53 | (WIP) Shell meta-command objectification done, ready for dbShell to be loaded and used for extension meta-commands (check-in: a88983ecb7 user: larrybr tags: cli_extension) | |
| 11:44 | The sqlite_offset() function should be non-deterministic. dbsqlfuzz 3df8230bb940870db87ffca2c0fc759c1e7fa356. (check-in: 8083757606 user: drh tags: branch-3.38) | |
| 11:43 | The sqlite_offset() function should be non-deterministic. dbsqlfuzz 3df8230bb940870db87ffca2c0fc759c1e7fa356. (check-in: e1a185e60a user: drh tags: trunk) | |
| 03:22 | (WIP) shell extension load and ShellState internal/external partitioning in place, passing shell tests with trivial exceptions (check-in: a85679d3e9 user: larrybr tags: cli_extension) | |
| 00:01 | Remove a NEVER() associated with sqlite_offset()> (check-in: bf2501e26c user: drh tags: branch-3.38) | |
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2022-03-05
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| 23:52 | Remove a NEVER() associated with sqlite_offset()> (check-in: e29dffcdba user: drh tags: trunk) | |
| 20:20 | Fix the 'localtime' modifier in date/time functions so that it preserves fractional seconds. Forum post 2ffbaa2c3fd7fb82. (check-in: 6833f4aeef user: drh tags: branch-3.38) | |
| 20:12 | Fix the 'localtime' modifier in date/time functions so that it preserves fractional seconds. Forum post 2ffbaa2c3fd7fb82. (check-in: 1c875b0764 user: drh tags: trunk) | |
| 19:46 | Increase the version number to 3.38.1. (check-in: cd87e77dd0 user: drh tags: branch-3.38) | |
| 19:39 | Cherry-pick all bug fix changes since the 3.38.0 release. (check-in: 45a5d5acf7 user: drh tags: branch-3.38) | |
| 19:36 | Further improvements to the sqlite_offset() function. (check-in: 4230e2f5e0 user: drh tags: trunk) | |
| 14:44 | Fix the sqlite_offset() function so that it gives the correct answer even if the argument is a virtual column in an index-only query. Test cases in TH3. (check-in: 6029514b08 user: drh tags: trunk) | |
| 11:57 | Update obsolete text in the ICU README.txt file talking about SQLite's robustness (or lack thereof) in the face of corrupt database files. (check-in: dc88fc62f0 user: drh tags: trunk) | |
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2022-03-04
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| 20:54 | Do try to evaluate the Bloom filter on a LEFT JOIN early, as doing so essentially converts it into an INNER JOIN. See forum thread 544af7eee2. (check-in: d46d0e67c9 user: drh tags: trunk) | |
| 16:28 | When setting an sqlite3_value object to a pointer value, make sure any prior memory allocations associated with that object have been cleared first. dbsqlfuzz 33f842d1a09afaad5f078c3e1162a54b78e5f2ab. (check-in: 31e1bde4b2 user: drh tags: trunk) | |
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2022-03-03
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| 19:40 | Restore the ability to push-down OR subterms of the WHERE clause when processing a multi-index OR. (check-in: d71fb6fdc3 user: drh tags: trunk) | |
| 16:48 | Make sure the xParseCell and xCellSize methods of the MemPage object are initialized consistently even if the page is detected as being corrupt. dbsqlfuzz fd21f341f3b4f582401d2feb2a1c0c4cc2c26caa. (check-in: 725a06434b user: drh tags: trunk) | |
| 15:59 | Fix for the problem identified in forum post 0cd8e058bf: When evaluating an multi-index OR, do not push down auxiliary WHERE clause terms that involve subqueries into the OR-subqueries. Otherwise, the covering-index optimizer might convert table-references into index-references for the particular OR index that is active for the branch in which the subquery subroutine is coded, and those index-references will not work if the subquery subroutine is invoked from a different OR branch that uses a different index. (check-in: 61a1c6dbd0 user: drh tags: trunk) | |
| 15:00 | Add the new OP_BeginSubrtn opcode (which is really an alias for OP_Integer) and make other changes so that the span of a subroutine that implements a subquery is more readily apparent in bytecode listings. (check-in: b822674870 user: drh tags: trunk) | |
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2022-03-02
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| 21:04 | Bloom filter pull-down optimization is incompatible with Skip-Scan. Make sure the query planner does not try to to both. Forum post 50a1bbe08ce4c29c. (check-in: ad3ffa1a75 user: drh tags: trunk) | |
| 17:50 | Faster version of sqlite3VdbeMemRelease(). (check-in: 86c5fa2f30 user: drh tags: trunk) | |
| 13:45 | Reinstate the releaseMemArray() performance optimization of [bb520293d8c11518] with corrections. (check-in: 1291080d11 user: drh tags: trunk) | |
| 11:39 | The optimization at [ece326db50201937] is not quite right, so back it out for now. (check-in: b218a4b9fe user: drh tags: trunk) | |
| 01:02 | Fix a harmless compiler warning. (check-in: 6497997aa8 user: drh tags: trunk) | |
| 00:50 | The performance optimizations at [bb520293d8c11518] is not quite right, so it has to be backed out. (check-in: 15f73b121c user: drh tags: trunk) | |
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2022-03-01
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| 20:15 | The MemPage.aDataEnd field should point to the end of the data buffer for the page, not just the end of the usable portion of that buffer. The purpose aDataEnd is to detect cells that overflow the page, and that won't work on a page with reserved bytes and a cell that starts in the reserved region, unless the boundary is at the very end of the page. Chromium issue 1276294. (check-in: f839c0bc83 user: drh tags: trunk) | |
| 19:19 | Fix a minor typo in a comment. (check-in: 86ba06aa4c user: drh tags: trunk) | |
| 16:22 | Fix two assert() statements in btree.c which were not true in the case of a corrupt database file. Forum post 14819f2063. (check-in: 3b36ed79d8 user: drh tags: trunk) | |
| 15:48 | Fix slightly-incorrect assert() statements. Forum post f1e83b77b5ff37db (check-in: 3c9f5c9def user: drh tags: trunk) | |
| 14:13 | Increase the max_page_count on ROLLBACK, if necessary, so that it is sufficient to cover the entire database. Fix for the problem identified by forum post 3b9e894312. (check-in: 12c012162c user: drh tags: trunk) | |
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2022-02-28
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| 16:44 | Fix the Xfer-optimization on the INSERT statement so that it is omitted if there is a RETURNING clause, since that optimization is not able to deal with RETURNING. See forum thread 595e132f71 for details. (check-in: 1d3760a517 user: drh tags: trunk) | |
| 14:26 | Reorganize the bits in Mem.flags. Free up one bit for reuse. (check-in: fe454291d9 user: drh tags: trunk) | |
| 13:38 | Expand the comment on the definition of the Mem object to better explain the meanings of the various flag bits. (check-in: f2f0426035 user: drh tags: trunk) | |
| 12:16 | Performance optimization in initMemArray() saves about 750K cycles with only a 4-byte increase in code size. (check-in: c3e9cd5e74 user: drh tags: trunk) | |
| 12:08 | The performance increase in the previous check-in of this branch was due to the revised loop in initMemArray() and reordering fields of Mem - not the call the memcpy(). Changing the code to avoid memcpy() results in an even better gain, and code that is far less dodgy. (Closed-Leaf check-in: d74aa97953 user: drh tags: optimize-init-mem) | |
| 03:25 | An optimization to initMemArray() saves almost 500K cycles. But it seems a little dodgy. I want to think about this more before merging to trunk. Perhaps there is a cleaner way to accomplish the same. (check-in: 7fefd86761 user: drh tags: optimize-init-mem) | |
| 02:35 | Avoid unnecessary deinitialization of the Mem.flags field. (check-in: bb520293d8 user: drh tags: trunk) | |
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2022-02-27
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| 21:10 | Cache values of UnpackedRecord.aMem[0] into new fields of UnpackedRecord. This avoids extra indirections and saves about 750K cycles. (check-in: 7cf2d1f039 user: drh tags: trunk) | |
| 18:54 | Bypass a single branch in vdbeRecordCompareString() in the common case, for a performance increase of over 600K CPU cycles. (check-in: 36f0f07e50 user: drh tags: trunk) | |
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2022-02-26
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| 23:01 | Remove an unnecessary local variable for a small performance increase and size reduction. (check-in: 9bda611f0d user: drh tags: trunk) | |
| 14:39 | Allow the OP_Column opcode to read rows that are larger than SQLITE_LIMIT_LENGTH as long as the specific field being read out is less than or equal to SQLITE_LIMIT_LENGTH. (check-in: 1bf4848995 user: drh tags: trunk) | |
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2022-02-25
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| 20:11 | Revise the initialization processing for OP_Column to make it about 1.8 million cycles faster. (check-in: 3b7259ebd5 user: drh tags: trunk) | |
| 18:51 | Fix the OP_NullRow documentation so that it accurately describes what it actually does for a pseudo-cursor. (check-in: 4e26990209 user: drh tags: trunk) | |
| 18:15 | Dead branch: Superseded by [3b7259ebd5b9b1f7] (Closed-Leaf check-in: 09a47f32a4 user: drh tags: simplify-cursor-state) | |