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50 check-ins occurring around fc8ca1a87e7127bd.

2014-04-01
01:24
Remove an unnecessary conditional, replacing it with an assert(). Improvements to comments. Closed-Leaf check-in: 834bf1c367 user: drh tags: overflow-pgno-cache
2014-03-31
23:57
Fix a compiler warning when SQLITE_DIRECT_OVERFLOW_READ is defined. Minor performance enhancement and size reduction. check-in: 96385dc460 user: drh tags: overflow-pgno-cache
22:03
Merge in the latest changes and fixes from trunk. check-in: f6211540c9 user: drh tags: overflow-pgno-cache
20:05
Remove an unnecessary conditional. Closed-Leaf check-in: 7473c4dfc1 user: drh tags: query-plan-experiments
19:57
Add the SQLITE_MAX_WORKER_THREADS compile time option. And the SQLITE_CONFIG_WORKER_THREADS sqlite3_config() switch. check-in: 2774710df8 user: dan tags: threads
19:49
Also make sure an index that is a proper subset of some other index has a higher cost than that other index. Add test cases. check-in: b7830d232b user: drh tags: query-plan-experiments
18:24
Make sure that an index that covers a proper superset of the WHERE clause terms of some other index has a lower cost than the other index. check-in: ea8b091004 user: drh tags: query-plan-experiments
13:42
Avoid a (harmless) buffer overread that is possible on an OOM when MEMSYS5 is engaged. check-in: b3296267fb user: drh tags: trunk
2014-03-29
21:16
Experiments in picking better query plans, especially when the usage of one index is a subset of another. check-in: 8f869ca7a6 user: drh tags: query-plan-experiments
19:48
Changes to make the multi-threaded sorter sort stably. Closed-Leaf check-in: 83a105c864 user: dan tags: threads-closed
10:01
Fix a broken assert() in vdbesort.c. check-in: 18d1b402f2 user: dan tags: threads
09:34
Fix a problem in vdbesort.c causing spurious SQLITE_NOMEM errors when using memsys3 or memsys5. check-in: a683c05f62 user: dan tags: threads
06:27
Add the optimization to avoid some unnecessary calls to sqlite3VdbeRecordUnpack() added to the trunk by [707ea170b3]. check-in: fc4d04e6b0 user: dan tags: threads
2014-03-28
19:47
Fix a compiler warning and an after-OOM memory leak. check-in: 58f7ca2930 user: drh tags: orderby-planning
19:18
Merge latest changes from orderby-planning branch. check-in: 4c7fb54234 user: dan tags: threads
18:35
Merge the latest changes from trunk. check-in: 3047a25f1c user: drh tags: orderby-planning
14:41
Disable the wal64k.test script for non-unix systems since it depends on unix-only features. check-in: 27deb6e49b user: drh tags: trunk
12:56
Fix a harmless compiler warning. check-in: a4e47150f3 user: drh tags: trunk
03:12
Enhance the sqlite3VdbeRecordCompare() routines so that if they encounter database corruption, they will set the UnpackedRecord.isCorrupt field and return 0. The sqlite3BtreeMovetoUnpacked() routine detects this and returns SQLITE_CORRUPT, causing the corruption to be reported back to the top-level. check-in: 7fa85eaaaf user: drh tags: trunk
2014-03-27
19:25
Instead of allocating a single large buffer at the beginning of each sort operation, start with a small buffer and extend it using realloc() as required. check-in: 81987c8ceb user: dan tags: orderby-planning
18:36
Minor cleanup of the code in the query planner that computes the costs estimates for the various plans. There are no changes to the costs at this time. But the code is slightly more readable now and that might facilitate future enhancements. check-in: 9b4d7226bc user: drh tags: trunk
17:23
Use xFetch() to access temporary files in vdbesort.c. Use a single large allocation instead of many small allocations when accumulating records in vdbesort.c. This is an interim commit - it allocates a buffer the size of the page-cache every time data is sorted. check-in: f4ac1bf28c user: dan tags: orderby-planning
14:05
Enhance the logest.c utility with new operators: "dup", "inv", "log", and "nlogn". Provide help on an invalid input. check-in: b4bd2a062c user: drh tags: trunk
00:09
Merge the latest trunk changes and the fix for the crash on a corrupt database. check-in: 0b35346c32 user: drh tags: orderby-planning
2014-03-26
19:45
Merge from trunk the fix for the crash on a corrupt database. check-in: 8cb2b02baa user: drh tags: threads
19:43
Merge in fixes (including the corrupt-database crash fix) and performance enhancements from trunk. check-in: fc8ca1a87e user: drh tags: sessions
18:51
Version 3.8.4.2 check-in: 02ea166372 user: drh tags: release, version-3.8.4.2, branch-3.8.4
16:25
Increase the version number to 3.8.4.2. check-in: 59978a2e42 user: drh tags: branch-3.8.4
16:22
Fix a potential buffer overread that could have occurred when searching a corrupt database file. check-in: db2935473e user: drh tags: branch-3.8.4
15:14
Add an extra test case for the potential buffer overread patched by [28ddecff04]. check-in: f585f5d7a0 user: dan tags: trunk
15:05
Add a test case to verify that the previous change avoids excess buffer overread in sqlite3VdbeRecordCompare(). check-in: 2b28e8d582 user: drh tags: trunk
14:51
Earlier detection of corruption in sqlite3VdbeRecordCompare() in order to avoid a potential buffer overread. check-in: 28ddecff04 user: drh tags: trunk
12:02
Add an assert() and a comment to clarify the operation of the vdbeRecordCompareInt() routine. check-in: 851abdb8fd user: drh tags: trunk
2014-03-25
20:28
Adjust the repeat counts on several tests in speedtest1 so that the relative time spent on the test is roughly the same regardless of --size. check-in: 7922809ee0 user: drh tags: trunk
18:29
Merge enhancements and fixes from trunk. check-in: e005f2d6dd user: drh tags: orderby-planning
17:45
Add another performance test case to speedtest1. This case is another ORDER BY test but this time without LIMIT. check-in: 9ab7ffd592 user: drh tags: trunk
17:07
Fix a problem in the code added by [707ea170b3] causing vdbesort.c to sort unstably. check-in: d3e640afe6 user: dan tags: orderby-planning
15:04
Remove the sequence values from sorter records used by ORDER BY as well. check-in: c3ae369783 user: dan tags: orderby-planning
14:54
Add an ORDER BY test case to speedtest1.c check-in: 588122641e user: drh tags: trunk
14:12
Enable four sorting threads by default in the command-line shell. check-in: 1cab83577c user: drh tags: threads
13:17
Merge all fixes and enhancements from trunk. check-in: b415dfb6cb user: drh tags: threads
11:00
Detect when a VdbeCursor is still pointing at a valid row but that row has moved, and invalidated the return from prior sqlite3BtreeDataFetch() or sqlite3BtreeKeyFetch() calls. check-in: e6798871ce user: drh tags: trunk
2014-03-24
20:19
Omit the sequence value from sorter records used by GROUP BY queries that cannot use an index. check-in: 3f90abddc3 user: dan tags: orderby-planning
18:08
Avoid unnecessary moving of content between registers during an ORDER BY. check-in: 4f472accf0 user: drh tags: orderby-planning
16:30
Remove unused variables Parse.nColCache and Parse.iColCache. check-in: 4d7551ce46 user: dan tags: trunk
15:00
Fix arithmetic operators so that they do not change the affinity of their input operands. Ticket [a8a0d2996a]. check-in: 221f8f9447 user: drh tags: trunk
12:33
Cancel column-cache entries that are involved in a comparison operator since the comparison might have forced an affinity change. Originally proposed as a fix for ticket [a8a0d2996a], but later determined to be incorrect. Closed-Leaf check-in: 0b95b7a874 user: drh tags: tkt-a8a0d2996a
11:23
Avoid attempting to mmap memory from an offset that is not a multiple of the system page size on systems with page sizes larger than 32KB. check-in: db7d62c8d5 user: dan tags: trunk
09:34
Remove an unnecessary temporary register allocation. check-in: 5d506743f5 user: dan tags: orderby-planning
02:20
Remove a pointless OP_Once operation in ORDER BY clauses with LIMIT. check-in: e6c59d2331 user: drh tags: orderby-planning