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50 most recent check-ins tagged with "experimental"
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2014-10-10
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| 20:52 | Account for the ASC/DESC properties of ORDER BY expressions when using the same index for GROUP BY and ORDER BY. Candidate fix for [ba7cbfaedc]. (Closed-Leaf check-in: 2a9573962b user: dan tags: experimental) | |
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2014-08-29
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| 11:24 | Add the sqlite3VdbeChangeDest() routine that can be used to eliminate OP_Move opcodes. (Closed-Leaf check-in: 8c57bcc327 user: drh tags: experimental) | |
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2014-08-22
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| 14:56 | Handle the 4-byte integer case in the stackless routine. (Closed-Leaf check-in: 3f55484e81 user: drh tags: experimental) | |
| 14:34 | Get the sqlite3VdbeSerialGet() routine to run faster by avoiding the use of local variables. (check-in: 8267d82174 user: drh tags: experimental) | |
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2014-03-03
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| 21:46 | Fix a couple of harmless compiler warnings. (Closed-Leaf check-in: fcf480cc63 user: drh tags: experimental) | |
| 20:48 | Avoid a buffer overread in vdbeCompareRecordInt() that might occur if the database is corrupt. (check-in: 7c0b4381f0 user: dan tags: experimental) | |
| 19:29 | Fix a typo in a comment. No changes to code. (check-in: 1f4991ab16 user: drh tags: experimental) | |
| 18:25 | Fix compiler warnings. (check-in: ba8993727e user: drh tags: experimental) | |
| 17:48 | Merge latest trunk changes. (check-in: 1d60356462 user: dan tags: experimental) | |
| 15:13 | Fix a harmless compiler warning. (check-in: d7f6837e69 user: drh tags: experimental) | |
| 14:45 | Merge latest trunk changes. (check-in: e00ed717fb user: dan tags: experimental) | |
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2014-03-01
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| 19:45 | Merge trunk changes. (check-in: 9c1747b5de user: dan tags: experimental) | |
| 19:44 | Remove the vdbeRecordCompareLargeHeader function. Fix some other details. (check-in: 3861e85310 user: dan tags: experimental) | |
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2014-02-28
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| 18:39 | Update some test cases that deal with corrupt databases. (check-in: 3a09f5605a user: dan tags: experimental) | |
| 09:48 | Minor tweak to vdbeRecordCompareInt(). (check-in: 284bde0ee2 user: dan tags: experimental) | |
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2014-02-27
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| 20:52 | Merge in latest trunk changes. (check-in: 8f30b09518 user: dan tags: experimental) | |
| 20:44 | Further changes to sqlite3VdbeRecordCompare(). (check-in: 5708937400 user: dan tags: experimental) | |
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2014-02-25
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| 21:01 | Attempt to speed up sqlite3VdbeRecordCompare() by various means. This code is in an interim state. (check-in: 85206e0bba user: dan tags: experimental) | |
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2013-03-08
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| 07:10 | If SQLITE_OMIT_UTF16 is defined, avoid setting the 'enc' field of Schema objects to any value except SQLITE_UTF8. Otherwise, assert() statements may fail or spurious SQLITE_NOMEM errors may be returned at the vdbe level later on. (Closed-Leaf check-in: 69746ef787 user: dan tags: experimental) | |
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2013-03-05
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| 15:27 | Do not attempt to set the permissions on an existing journal or wal file. Do this only immediately after creating a new file (or opening one zero bytes in size). (Closed-Leaf check-in: 1d8086902e user: dan tags: experimental) | |
| 15:09 | Add extended error code SQLITE_READONLY_ROLLBACK. Returned if a read-only connection cannot read the database because doing so would require it to roll back a hot-journal. (check-in: 39247b14a5 user: dan tags: experimental) | |
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2011-12-16
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| 13:24 | Experimental fix for [a1fa75cbdd]. (Closed-Leaf check-in: 6492af76ea user: dan tags: experimental) | |
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2011-12-13
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| 12:10 | This branch merged with nx-devkit and from there into trunk. Was: In the multiplexor, instead of generating a unique file-name when SQLite opens a temp file, allow the underlying VFS to generate a different temp file for each chunk. Given the changes to the xFileSize method, it is no longer necessary for the different chunks of a temp file to use the same base name. (Closed-Leaf check-in: 199f52bced user: dan tags: experimental) | |
| 11:15 | Change the way IO errors are handled in the xFileSize method of the multiplexor VFS. Add test file multiplex3.test. (check-in: 255d21499b user: dan tags: experimental) | |
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2011-08-29
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| 02:49 | About a 1% overall performance improvement by using a macro to avoid no-op calls to sqlite3MemReleaseExternal(). (Closed-Leaf check-in: ff71d20a9e user: drh tags: experimental) | |
| 02:16 | Small performance improvement to OP_Column. (check-in: b6b73a747a user: drh tags: experimental) | |
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2011-08-28
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| 02:15 | About a 3% improvement in the performance of OP_Column. (check-in: edff9d4a99 user: drh tags: experimental) | |
| 00:19 | Correctly display P4_ADVANCE values on opcode traces. Mark an always-taken branch in OP_Column as such. (check-in: 087dc96086 user: drh tags: experimental) | |
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2011-08-27
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| 18:48 | Experimental changes to improve the performance of OP_Next. (check-in: 1a24984525 user: dan tags: experimental) | |
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2011-08-12
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| 16:34 | Update Makefile.in and configure to account for new source file vdbesort.c. (Closed-Leaf check-in: 69e4b41de2 user: dan tags: experimental) | |
| 16:30 | Merge latest trunk changes into experimental branch. (check-in: 7e515055f2 user: dan tags: experimental) | |
| 16:11 | Remove an unused parameter from a function in vdbesort.c. Fix some comments and other details in the same file. (check-in: 1a8498d803 user: dan tags: experimental) | |
| 15:02 | Add the SQLITE_OMIT_MERGE_SORT pre-processor directive. To omit the code in vdbesort.c. (check-in: 4ced2394b1 user: dan tags: experimental) | |
| 11:59 | Add tests to improve coverage of vdbesort.c. (check-in: 87a15917d7 user: dan tags: experimental) | |
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2011-08-08
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| 19:26 | Remove redundant parameter from vdbeSorterInitMerge() in vdbesort.c. (check-in: eec8c0df07 user: dan tags: experimental) | |
| 16:44 | Add fault-injection and other tests (and fixes) to improve coverage of vdbesort.c. (check-in: 0e6defa6aa user: dan tags: experimental) | |
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2011-08-06
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| 15:09 | Fix a problem with building large indexes introduced by the previous commit. (check-in: 038ec9ea92 user: dan tags: experimental) | |
| 12:01 | In temp files used for merge sorting, store the size of each packed-memory-array at the start of the array itself. This is to avoid having to store the offsets of all arrays in the (potentially very large) file in main-memory. (check-in: 8051c1767c user: dan tags: experimental) | |
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2011-08-05
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| 11:49 | Minor internal changes to vdbesort.c. Also, default to merging lists together 16 at a time. (check-in: 9ddc324a34 user: dan tags: experimental) | |
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2011-08-04
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| 18:43 | Fix a comment in vdbesort.c. (check-in: db8518cab8 user: dan tags: experimental) | |
| 12:14 | Change to using packed-memory-arrays instead of b-trees when performing an offline merge-sort for CREATE INDEX. This makes it easier to control the number of disc seeks required when merging. (check-in: a4770d079c user: dan tags: experimental) | |
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2011-08-02
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| 10:56 | Minor fixes to vdbesort.c code in preparation for a major rework. (check-in: 7f339c0e26 user: dan tags: experimental) | |
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2011-07-12
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| 14:28 | Experimental support for speeding up CREATE INDEX commands using an offline merge sort. (check-in: 30dbf0feab user: dan tags: experimental) | |
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2011-07-02
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| 06:44 | Fix a broken assert() in where.c. (Closed-Leaf check-in: 090b29177f user: dan tags: experimental) | |
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2011-07-01
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| 18:43 | Merge latest trunk changes with experimental branch. (check-in: e56be74eab user: dan tags: experimental) | |
| 18:26 | Improve use of indexes to optimize DISTINCT queries. (check-in: 6c202ea024 user: dan tags: experimental) | |
| 14:21 | Improvements and tests for detection of redundant DISTINCT qualifiers. (check-in: 7337293c87 user: dan tags: experimental) | |
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2011-06-30
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| 20:17 | Experimental changes to improve optimization of DISTINCT queries. (check-in: f7ba0219ef user: dan tags: experimental) | |
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2011-04-15
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| 13:29 | Add retry logic to GetFileAttributesEx() on windows. (Closed-Leaf check-in: 1cca9a49f2 user: drh tags: experimental) | |
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2010-12-20
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| 15:51 | Add additional DBSTATUS options for measuring the hit and miss rates against the lookaside memory pool - information useful in tuning the lookaside size. Currently experimental pending analysis of performance impact. (Closed-Leaf check-in: 34613f1dc5 user: drh tags: experimental) | |