This Day In History For 2018-06-17
1 Year Ago (more context)
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2017-06-17
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| 19:06 | Avoid adding an artifical "LIMIT 1" on scalar subqueries that do not need it. This seems like a pointless optimization as it makes minimal run-time difference but does increase code complexity. Parked on a branch for historical reference. (Leaf check-in: c21628e9c1 user: drh tags: subquery-limit-opt) | |
| 18:49 | Fix a missing comma in the previous check-in. (check-in: f3db02f490 user: drh tags: trunk) | |
| 17:55 | Rework the code in ctime.c a bit to report on more compile time options. And to only output configuration options passed in to SQLite, not the default values of #define symbols set automatically. Also generate the large array in ctime.c using new script tool/mkctime.tcl, instead of entering it manually. (check-in: 9a443397a6 user: dan tags: trunk) | |
| 17:29 | Ensure that the value of the THREADSAFE symbol is always included when reporting compile time options, even if it was not explicitly configured. (Closed-Leaf check-in: 95141c6426 user: dan tags: ctime-refactor) | |
| 16:39 | Add extra test cases for sqlite3changeset_apply() and ALTER TABLE ADD COLUMN. (check-in: 603838fc9a user: dan tags: trunk) | |
| 09:59 | Version 3.18.2 (check-in: 036ebf729e user: drh tags: release, branch-3.18, version-3.18.2) | |
| 00:39 | When building an ephemeral table of integers, do not assume that the table does not already contain N if the insert cursor points to N-1. Fix for ticket [61fe9745]. Also increase the version number to 3.18.2. This is the release candidate. (check-in: e1b7102908 user: drh tags: branch-3.18) | |
2 Years Ago (more context)
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2016-06-17
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| 19:27 | Include WHERE terms in the cursor-hint passed to a cursor opened for the rhs of a LEFT JOIN iff we can be sure that those terms will not evaluate to true if the LEFT JOIN generates a row of NULLs. (check-in: 998095aba0 user: dan tags: cursor-hints) | |
| 14:59 | Fix a duplicate test name in cursorhint2.test. (check-in: fcd12b69ce user: dan tags: cursor-hints) | |
| 14:47 | Fix a typo in the cursorhint2.test script. (check-in: c1a5a57cf1 user: dan tags: cursor-hints) | |
| 14:33 | If a table is on the rhs of a LEFT JOIN, include only terms from the joins ON(...) clause in the cursor-hint passed via OP_CursorHint. (check-in: 2a2346b042 user: dan tags: cursor-hints) | |
| 13:01 | Add the json_quote() function to the JSON1 extension. (Closed-Leaf check-in: 2c3714aebf user: drh tags: json_quote) | |
3 Years Ago (more context)
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2015-06-17
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| 23:28 | Performance improvement in sqlite3VdbeMemShallowCopy() for the common case where the receiver does not require prior resource deallocation. (check-in: d718ea36dc user: drh tags: trunk) | |
| 19:06 | Use 'binary' mode for popen with MSVC. (Closed-Leaf check-in: 7b84641e55 user: mistachkin tags: popenMsvc) | |
| 18:57 | Improve spacing and comment style for the shell. No changes to code. (check-in: 5b547da00d user: mistachkin tags: trunk) | |
| 18:24 | Improved comments on the fuzzcheck.c test program. No changes to code. (check-in: a7e27d1928 user: drh tags: trunk) | |
| 18:18 | Merge all recent enhancements and fixes from trunk. (check-in: 199bfb67fd user: drh tags: sessions) | |
| 17:08 | Fix a uninitialized variable use in the command-line shell when the ".open" command is invoked without any arguments. (check-in: fc4f4d1ecc user: drh tags: trunk) | |
| 13:20 | Performance optimization and comment fixes for the LIKE and GLOB operators. (check-in: c89d772628 user: drh tags: trunk) | |
| 02:11 | Make getCellInfo() a real function instead of a macro, for a size reduction and a 0.2% performance gain. (check-in: 55c393ea14 user: drh tags: trunk) | |
| 01:31 | Optimizations to two VDBE accessory routines for a 0.2% performance increase. (check-in: 66d033b9c9 user: drh tags: trunk) | |
4 Years Ago (more context)
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2014-06-17
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| 20:16 | Prevent an automatic index from taking the place of a declared index. (Closed-Leaf check-in: 4ece839d44 user: drh tags: autoindex-improvements) | |
| 18:43 | Experimental changes to use GetFileInformationByHandle instead of GetFileSize in the Win32 VFS. (Closed-Leaf check-in: d22c814297 user: mistachkin tags: filesize-debug) | |
| 17:00 | Fix a missing space in a "wheretrace" comment. No changes to production code. (check-in: b500f2a097 user: drh tags: trunk) | |
| 16:11 | Add the likely() function for symmetry with unlikely(). The likely(X) function means the same thing as likelihood(X,0.9375). (check-in: 3896548419 user: drh tags: trunk) | |
| 15:53 | Improvements to query planning, especially in regards to estimating the cost and benefit of automatic indexes. (check-in: 1272fb8991 user: drh tags: trunk) | |
| 15:13 | Small tweaks to the query planner to get it to try harder to use an index for sorting and to avoid using automatic indexes on constant terms. (Leaf check-in: 2d9de154f8 user: drh tags: branch-3.8.3) | |
| 13:23 | Add the autoindex2.test testing module. (check-in: ffe3fea47b user: drh tags: autoindex-improvements) | |
| 12:33 | A different approach to the autoindex problem that deletes query-planner code rather than adding it. (check-in: f270fb6e9e user: drh tags: autoindex-improvements) | |
| 09:52 | Simplification to the logic that prevents automatic indexes from being formed on constant expressions. (check-in: 36d67e1dd2 user: drh tags: autoindex-improvements) | |
| 09:00 | Allow an automatic index on a WHERE constraint where the RHS is does not reference another table as long as the RHS is not a constant. (check-in: 58acc2a8b3 user: drh tags: autoindex-improvements) | |
| 02:46 | Do not attempt to create an automatic index on a constant constraint, as doing so is pointless. (check-in: d6883e960f user: drh tags: autoindex-improvements) | |
5 Years Ago (more context)
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2013-06-17
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| 21:37 | Add more testcase() macros. Fix a memory leak following OOM in the virtual table analysis logic. (check-in: b61402af69 user: drh tags: nextgen-query-plan-exp) | |
| 18:20 | Simplifications to the NGQP. Add the queryplantest makefile target. Add testcase() macros in the NGQP. (check-in: eaf1f1b405 user: drh tags: nextgen-query-plan-exp) | |
| 14:18 | Use automatic indices on subqueries of the FROM clause when appropriate. (check-in: e8f124284e user: drh tags: nextgen-query-plan-exp) | |
10 Years Ago (more context)
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2008-06-17
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| 18:57 | Add the SQLITE_CONFIG_MUTEX symbol for use with sqlite3_config(). (CVS 5228) (check-in: af1835bb5f user: danielk1977 tags: trunk) | |
| 17:21 | Change the mutex interface to be pluggable. This is an incremental checkin, there are still changes to come. (CVS 5227) (check-in: 597283637b user: danielk1977 tags: trunk) | |
| 15:12 | Add internal interfaces: PageMalloc/PageFree and ScratchMalloc/ScratchFree. (CVS 5226) (check-in: 3e797d0ffe user: drh tags: trunk) | |
| 01:03 | Do not allow a VACUUM to try to change the page_size on an encrypted database. (CVS 5225) (check-in: d49e502001 user: drh tags: trunk) | |
15 Years Ago (more context)
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2003-06-17
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| 02:57 | Remove unused variable. Ticket #355. (CVS 1030) (check-in: 5228cecdb8 user: drh tags: trunk) | |