This Day In History For 2025-05-28
1 Year Ago (more context)
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2024-05-28
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| 19:08 | Fix a couple of assert() statements so that they cannot fire when the SQLITE_TESTCTRL_INTERNAL_FUNCTIONS debugging capability is activated. dbsqlfuzz f5b347cf167a62fbe08062b2feee65cb9306e363. (check-in: 273504b74c user: drh tags: trunk) | |
| 18:53 | Tweaks to the query planner so that it is better able to deal with star queries with many dimensions and bad indexes. (check-in: 1e49081001 user: drh tags: trunk) | |
| 18:41 | Fix another problem with the sqlite3_log() message identifying the table or index that a conflicting page belongs to. (check-in: 19d5fd8a48 user: dan tags: bedrock) | |
| 18:35 | Fix another problem with the sqlite3_log() message identifying the table or index that a conflicting page belongs to. (check-in: d033d94350 user: dan tags: begin-concurrent) | |
| 15:37 | For query planning purposes, assume every table holds at least 100 rows, as this seems to give better worst-case performance if the table row count estimate turns out to be inaccurate. Park this change on a branch for now and consider it for a future enhancement. (Leaf check-in: 76c7d9334f user: drh tags: min-row-estimate) | |
| 12:41 | Increase the number of parallel paths in the query solver from 12 to 20. In the .wheretrace output, sort the parallel paths in order of increasing cost. (check-in: 8ba2c2f5cb user: drh tags: trunk) | |
| 11:24 | Documentation typo fix. Forum post 772d6688f5. (check-in: 1f2f9c709e user: drh tags: trunk) | |
| 10:57 | Fix a problem with the error message reported by fts5 in some OOM cases. (check-in: c7aaa28f78 user: dan tags: trunk) | |
| 00:20 | • Fixed ticket [8ff324e120]: Unwarranted use of automatic index plus 6 other changes (artifact: 089ea52120 user: drh) | |
| 00:20 | • Edit [2a7603c327d11d5e|2a7603c327]: Edit check-in comment. (artifact: d12cc275b8 user: drh) | |
| 00:18 | • Edit [2a7603c327d11d5e|2a7603c327]: Edit check-in comment. (artifact: 9d12fe8980 user: drh) | |
| 00:16 | Improve the automatic-index decision such that no attempt is made to create an automatic index on a column that is known to be non-selective because if its use in other indexes that have been analyzed. See ticket [8ff324e120d5e9bd] and forum post b21c2101a559be0a. (check-in: 2a7603c327 user: drh tags: trunk) | |
| 00:01 | Query planner tuning: Increase the maximum number of simultaneous solutions to track in the solver from 10 to 12. (check-in: fe2e1dadba user: drh tags: trunk) | |
3 Years Ago (more context)
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2022-05-28
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| 15:01 | Merge the latest trunk enhancements into the reuse-schema branch. (check-in: 4d46296ef6 user: drh tags: reuse-schema) | |
| 14:51 | Merge the latest trunk enhancements into the begin-concurrent-pnu-wal2 branch. (check-in: 4d65f45b31 user: drh tags: begin-concurrent-pnu-wal2) | |
| 14:44 | Merge the latest trunk enhancements into the wal2 branch. (check-in: 934656f13d user: drh tags: wal2) | |
| 14:32 | Merge the latest trunk enhancements into the begin-concurrent-report branch. (check-in: 034d2c511a user: drh tags: begin-concurrent-report) | |
| 14:25 | Merge the latest trunk enhancements into the begin-concurrent branch. (check-in: d6f6ee5cbc user: drh tags: begin-concurrent) | |
| 14:03 | Apply the UPDATE-FROM file from check-in [98b3816bbaf539ea] to update-delete-limit builds. (check-in: 7e87892c24 user: drh tags: trunk) | |
| 11:59 | fiddle: changed the internal key of the session/local storage to avoid conflicts with the pikchr fiddle app (which is derived from this one) when running from the same HTTP origin as an instance of that app in a dev environment. (check-in: fd668da5cc user: stephan tags: trunk) | |
| 11:29 | fiddle: corrected a piece of far-corner-case error handling and made the various checkbox config options persistent. (check-in: 2ba429a4f8 user: stephan tags: trunk) | |
4 Years Ago (more context)
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2021-05-28
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| 14:28 | If a subquery is used to drive an index, this change avoids making an extra copy of the result of that subquery. But, such situations are probably sufficiently unusual that the added complexity of this enhancement is not worth the performance gain. So I'm going to park this check-in on a branch. If we later find a use case to justify it, we can merge it to trunk then. This is the "further change" that was promised by the prior check-in comment. (Leaf check-in: 4488cb883e user: drh tags: copy-optimization) | |
| 12:48 | Make a deep copy of the result of a subquery in case the subquery is reused. Fix for the problem reported by forum post 28216b36ac and introduced by check-in [f30fb19ff763a7cb]. Further changes to try to optimize the new OP_Copy opcode back into either OP_SCopy or OP_Move will be attempted separately. A test case will be in TH3. (check-in: c9f0b9cb0a user: drh tags: trunk) | |
| 12:15 | Fix a potential memory leak in json_group_object() following an error. dbsqlfuzz cd32630de3ff039d97089592b63cb3616f8ec9dd (check-in: 21676731ce user: drh tags: trunk) | |
5 Years Ago (more context)
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2020-05-28
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| 23:49 | Progress toward adding new output modes to the CLI: json, table, and markdown. (check-in: 14f55fafec user: drh tags: trunk) | |
| 20:37 | Enhance the ".quote" mode in the shell so that it honors .separator. (check-in: b5e33ed537 user: drh tags: trunk) | |
| 00:45 | When the sqlite_stat1 data is missing for some indexes of a table but is present for the table itself or for other indexes in the same table, then do not let the estimated number of rows in that table get too small, as doing so can deceive the query planner into ignoring a perfectly good index. (check-in: 98d4262018 user: drh tags: trunk) | |
10 Years Ago (more context)
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2015-05-28
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| 19:57 | Optimizations for fts5 queries that match against a specific column. (check-in: b29ac50af0 user: dan tags: fts5) | |
| 15:14 | Added comments and testcase() macros to error cases in the btree search. (check-in: 7da7dc714b user: drh tags: trunk) | |
| 14:37 | Remove some dead code from fts5. Add auxiliary function api tests to the same. (check-in: 0f9df202cc user: dan tags: fts5) | |
| 11:23 | Earlier detection of incompatible sibling pages in balance_nonroot. (check-in: 60a09f17d8 user: drh tags: trunk) | |
| 03:45 | Add new test cases to the fuzzdata3.db set of database fuzz tests. (check-in: 467b13a401 user: drh tags: trunk) | |
| 03:28 | Add the btreeGetUnusedPage() routine to btree.c, and use it to detect content pages on the freelist and to cause that condition to trigger an SQLITE_CORRUPT. (check-in: fe15d1f703 user: drh tags: trunk) | |
| 00:54 | Do not attempt to take any write lock on a read-only database on Windows. (check-in: a47ff0cdab user: drh tags: trunk) | |
15 Years Ago (more context)
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2010-05-28
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| 11:44 | • Edit [778d0c1768f73057|778d0c1768]: Timestamp 2010-05-28 11:16:28. (artifact: 1d2be1eb58 user: dan) | |
| 11:16 | Add a test to walcksum.test to stress the checksum calculation. (check-in: 778d0c1768 user: dan tags: trunk) | |