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100 check-ins occurring around eba95ead49f8f8ce.

2014-05-02
00:09
Add a comment explaining why WhereLoop cost adjustments are omitted for skip-scan loops. check-in: 3bc43594 user: drh tags: trunk
2014-05-01
20:26
Fix an obscure problem to do with temp register allocation that could occur if more than one simple SELECT within a compound SELECT uses a partial sort. check-in: 427409ae user: dan tags: trunk
20:24
Add #ifdefs for test coverage. Add a testcase(). check-in: be2702ce user: drh tags: trunk
10:19
Update a test case in wal2.test that explicitly corrupts a checksum in the wal file to account for the fact that the first byte of said checksum may initially be 0xFF. check-in: 2b935bde user: dan tags: trunk
01:49
Take out the special handling of nolock=true in os_win.c and add it to pager.c, so that it works for all VFSes. Add the pPager->noLock boolean for clarity. check-in: 725c1c14 user: drh tags: win32-none
01:20
Avoid unnecessary xUnlock operations on temp file. check-in: 1829c38c user: drh tags: win32-none
01:13
Add the immutable=TRUE query parameter and SQLITE_IOCAP_IMMUTABLE, either of which prevents locking of the database and omits tests for existance of journal files. check-in: 71f152c8 user: drh tags: win32-none
2014-04-30
20:32
Merge in all recent changes and enhancements from trunk. check-in: 84243f84 user: drh tags: win32-none
18:11
Fix a problem in calculating the costs of "OR" scans. check-in: 9bbca48b user: dan tags: trunk
15:22
Modify the way the costs of various query plans are estimated. If the user supplies a likelihood() value (or equivalent) on an indexed WHERE constraint, use it to estimate the number of index rows visited. check-in: 90e36676 user: dan tags: trunk
15:00
Add text to the header comment of whereLoopAddBtree() describing how the costs of various b-tree loops are estimated. Closed-Leaf check-in: 05e6e16c user: dan tags: experimental-costs
14:53
Update a couple of test cases to account for the fact that this branch prefers an index scan and partial sort over a full-table scan and full external sort. check-in: 9b975bf3 user: dan tags: experimental-costs
14:47
Fix a couple of out-of-date comments in where.c. check-in: eefeda32 user: dan tags: experimental-costs
14:22
Improved rendering of LogEst values corresponding to real values near 0.0 in the tool/logest.c utility program. check-in: 32910c8c user: drh tags: experimental-costs
13:19
Fix long-standing typos in comments. check-in: b9f91317 user: drh tags: experimental-costs
2014-04-29
19:01
Test that the default values used when sqlite_stat1 data is not available are calculated correctly. Fixes for the same. check-in: e2d42f90 user: dan tags: experimental-costs
16:46
Merge trunk changes into this branch. check-in: d74299f0 user: dan tags: experimental-costs
16:10
Ignore likelihood() values on indexed IPK lookups. check-in: 5bb7757a user: dan tags: experimental-costs
12:01
Fix a test case so that it updates sqlite_stat1 consistently. check-in: 2dc5a0b5 user: dan tags: experimental-costs
2014-04-28
20:11
Do not reduce the number of rows scanned at all for "IS NOT NULL" constraints. Fix a bug in calculating the number of rows visited by scans of partial indicies. check-in: a8ae93f0 user: dan tags: experimental-costs
19:34
The trunk assumes that an open range constraint on an indexed term (col>?) term matches 1/4 of the indexed rows, and that a closed constraint (col BETWEEN ? AND ?) matches 1/64. Change this branch to do the same. check-in: 4047ac75 user: dan tags: experimental-costs
18:02
Merge all recent trunk enhancements and fixes into the sessions branch. check-in: e158812c user: drh tags: sessions
17:56
Add the sqlite3_rtree_query_callback() API to the RTree virtual table. (Cherrypick from the sessions branch.) check-in: af2cbe64 user: drh tags: trunk
17:51
Add the sqlite3_rtree_query_callback() API to the RTree virtual table. check-in: 3dca2809 user: drh tags: sessions
15:11
Update unordered.test to take into account for the fact that SQLite now prefers a full-table scan over a non-covering index scan that visits a large percentage of the table rows. check-in: 20f468df user: dan tags: experimental-costs
12:08
Add an extra column to a table in analyze9.test to give the planner a little more reason to select an index. check-in: 1b95544f user: dan tags: experimental-costs
10:00
Update test script analyze3.test to account for the fact that SQLite now prefers a full-table scan over a non-covering index scan that visits a large percentage of the table rows. check-in: 35f46a55 user: dan tags: experimental-costs
09:35
Modify internal function whereLoopAdjustCost() so that it does not prefer a skip-scan over a regular index scan even if the regular scan uses a subset of the WHERE terms used by the skip-scan. check-in: 88a5758d user: dan tags: experimental-costs
08:49
Fix an error in estimating of the number of rows visited by a range scan. check-in: d491de62 user: dan tags: experimental-costs
2014-04-26
20:21
Fix an sqlite3_stmt_status() problem caused by recent changs on this branch. check-in: dee20409 user: dan tags: experimental-costs
19:23
Update requirements marks to fix typos in the requirements text. No changes to code. check-in: f5a26365 user: drh tags: trunk
17:52
Allow the xfer optimization to proceed if the DEFAULT on the very first column of the two tables is different. This is a refinement of the fix for ticket [f67b41381a]. check-in: 349f4834 user: drh tags: trunk
14:07
Avoid transfering records between tables unless the default values for all columns are the same. Fix for [f67b41381a]. check-in: f8c4c495 user: dan tags: trunk
2014-04-25
20:22
If the user provides likelihood() data for a WHERE clause term used as part of an index key, have the planner use it when calculating the expected number of rows visited by the loop. check-in: c51efaa5 user: dan tags: experimental-costs
17:37
Add test cases to ensure correct operation of joins with a virtual table that include DISTINCT and ORDER BY clauses. Verification for ticket [388d01d4bb8f9]. check-in: 5ada136f user: drh tags: trunk
16:29
Enhance the sqlite3_rtree_query_info object to report on the number of elements in the priority queue at each level. Closed-Leaf check-in: f7dad408 user: drh tags: rtree-enhancements
15:01
Store values loaded from the stat1 table as logarithmic values in memory. check-in: 1bd74c49 user: dan tags: experimental-costs
14:42
Make sure ORDER BY clauses on joins that involve virtual tables and that have a DISTINCT clause work correctly. This is a candidate fix for ticket [388d01d4bb8f9]. Test cases for that ticket will be checked in separately. check-in: 17113812 user: drh tags: trunk
12:35
When VDBE_PROFILE is enabled, ignore negative opcode times, which sometimes occur, perhaps due to context swaps. check-in: 4e88042f user: drh tags: trunk
2014-04-24
20:04
Changes to the way the planner calculates the costs of various table and index scans. Some test cases still failing. check-in: c5a6ec0a user: dan tags: experimental-costs
16:25
Improved header comment on the vdbesort.c module. No changes to code. check-in: bf09ce24 user: drh tags: orderby-planning
15:06
Reopen the orderby-planning branch and merge in the latest trunk enhancements and fixes. check-in: 6077ddcd user: drh tags: orderby-planning
13:20
Add sqlite3_log() diagnostic messages for a specific type of corruption where the file size is reported to be too small relative to the size in the header. This branch is intended to help debug a specific problem reported from the wild and is not for general use. check-in: 34155c40 user: drh tags: filesize-debug
12:28
Improvements to comments. Store some extra information in SqliteThread that is useful for debugging. check-in: 9fb5e212 user: drh tags: threads
2014-04-23
12:57
Merge all recent trunk changes into the threads branch. check-in: e2c9f71a user: drh tags: threads
12:00
Enhancements to the date and time functions so that they optionally support a 5-digit year. Not sure we want to include this in trunk. Saved in a branch for future reference. Closed-Leaf check-in: 2029a396 user: drh tags: five-digit-year
2014-04-22
19:42
Change from using the win32-none VFS to just a query parameter. check-in: ffceacf6 user: drh tags: win32-none
19:34
Add some OSTRACE calls for consistency. check-in: be292d55 user: mistachkin tags: win32-none
19:30
Add the win32-none VFS which omits rollback-journal locking. check-in: 03e3c5a8 user: drh tags: win32-none
2014-04-21
18:13
Fix the generation of sqlite3_rtree_query_info.iRowid and add test cases to verify that it is fixed. check-in: eba95ead user: drh tags: rtree-enhancements
18:00
Preliminary changes to support building VSIX packages for Windows 8.0 and Windows Phone 8.0 using Visual Studio 2013. check-in: 3bf97c81 user: mistachkin tags: vsixWinPhone81
15:53
Be sure to initialize the sqlite3_rtree_query_info.iRowid field for the leaves of the R-Tree when doing a query callback search. check-in: 43946938 user: drh tags: rtree-enhancements
15:21
Fix an off-by-one error in setting the "iLevel" field of the sqlite3_rtree_query_info structure passed into the RTree query callback. check-in: d708f159 user: drh tags: rtree-enhancements
13:36
Comment tweaks on the test case for the [b75a9ca6b0] bug fix. check-in: 65d2544a user: drh tags: trunk
13:21
Avoid discarding an ORDER BY clause in the case where an identical GROUP BY clauses uses an index to group, but not sort, the rows. Fix for [b75a9ca6b0]. check-in: de9a490f user: dan tags: trunk
2014-04-18
22:20
Clean up the proper-subset cost adjustment logic to make it more compact and easier to read and so that full branch test coverage is more easily obtained. check-in: 9a5d38c7 user: drh tags: trunk
13:57
Add to speedtest1.c the --threads option for setting the SQLITE_CONFIG_WORKER_THREADS configuration. check-in: 5fce40c4 user: drh tags: threads
13:40
Fix harmless compiler warnings. check-in: f8f72ecb user: drh tags: threads
12:38
Merge recent trunk changes into the threads branch. check-in: 8729aa3e user: drh tags: threads
01:37
Further improvements to the RTREE_DECODE_COORD() method, to take advantage of known processor byte orders when available. This makes the code 3% faster, according to valgrind. Also add test cases to make sure the on-disk representation is correct. check-in: 6f3e94f4 user: drh tags: rtree-enhancements
01:14
Merge the latest changes from sessions. check-in: d9eef5b0 user: drh tags: rtree-enhancements
01:10
Merge recent trunk changes into sessions. check-in: 95e77efe user: drh tags: sessions
00:49
Add the SQLITE_RUNTIME_BYTEORDER compile-time option to force SQLite to check the processor byte-order at run-time. Add additional compile-time byte order checks for ARM, PPC, and SPARC. check-in: 2c536387 user: drh tags: trunk
00:08
Preliminary changes to support building VSIX packages for Windows Phone 8.1. check-in: a1b2f28b user: mistachkin tags: vsixWinPhone81
00:06
Add the SQLITE_TESTCTRL_BYTEORDER test control to interrogate SQLite's notion of the processor byte order and whether the byte order is known at compile-time or determined at run-time. check-in: 9c696196 user: drh tags: trunk
2014-04-17
23:23
Performance optimization on byte-swapping in R-Tree. check-in: 444084fd user: drh tags: rtree-enhancements
15:34
More test cases with very long priority queues. check-in: 71692aa9 user: drh tags: rtree-enhancements
14:52
Test cases and bug fixes for the sqlite3_rtree_query_callback() mechanism. check-in: 1ccaaed6 user: drh tags: rtree-enhancements
13:15
Refactor the constraint checking logic in RTree. The new-style constraint callbacks created by sqlite3_rtree_query_callback() are now hooked up from end to end, though still untested. check-in: 32a13870 user: drh tags: rtree-enhancements
08:57
Fix build problems in vdbesort.c. Add further comments and changes to make things easier to understand. check-in: 12b190db user: dan tags: threads
2014-04-16
21:02
Performance optimization on nodeGetCell() in R-Tree. check-in: 5d20ff9e user: drh tags: rtree-enhancements
19:04
Clarify the purpose of the nField argument passed to sqlite3VdbeSorterInit(). check-in: c0c8cff1 user: dan tags: threads
17:41
Change the name of vdbeIncrInit2 to vdbePmaReaderIncrInit. Add a header comment to the same function. check-in: 6622d876 user: dan tags: threads
17:23
Convert the RTree module query mechanism over to using a priority queue for walking the RTree. check-in: f26936f7 user: drh tags: rtree-enhancements
17:15
TCL tests now all pass. Closed-Leaf check-in: f864bacc user: drh tags: rtree-queue
16:43
Rework the way trees of MergeEngine objects are built in vdbesort.c to make it easier to follow. Fix memory leaks that could follow an OOM or IO error. Add various comments to explain functions in vdbesort.c. check-in: 69026ec7 user: dan tags: threads
14:45
Fix a bug in rowid=? query handling. More problems remain. check-in: 5b0e6ba4 user: drh tags: rtree-queue
13:00
Bug fixes to the priority-queue implementation for R-Trees. Improved tracing capability. Some queries work now, but still many problems. check-in: a439ddd6 user: drh tags: rtree-queue
2014-04-15
21:06
Initial attempt at getting R-Tree queries to work using a priority queue. This check-in compiles, but R-Trees do not work well. And there are debugging printf()s left in the code. This is an incremental check-in. check-in: 53688a25 user: drh tags: rtree-queue
20:52
Fix some problems to do with OOM conditions in vdbesort.c. Some problems remain. check-in: 2f94f9ce user: dan tags: threads
19:52
Fix further code and documentation issues in vdbesort.c. check-in: d03f5b86 user: dan tags: threads
2014-04-14
19:48
Make sure the undocumented sqlite_rename_parent() function does not crash even if it is invoked with NULL arguments. Ticket [264b970c4379fd4b94] check-in: c6fa8d0d user: drh tags: trunk
19:23
Allow the sorter to begin returning data to the VDBE as soon as it is available, instead of waiting until all keys have been sorted. check-in: cb0ab20c user: dan tags: threads
18:41
Improve performance in single-threaded mode by having the final merge pass keys directly to the VDBE, instead of going via a final PMA. Closed-Leaf check-in: 02610cd9 user: dan tags: threads-experimental
14:43
Fix comments on the rtreenode() and rtreedepth() test function in the R-Tree module. check-in: ade5b986 user: drh tags: rtree-enhancements
12:18
Remove over 300 lines of unused code, code that implemented the older Guttman insertion algorithms that are no longer used. check-in: 3ba5f295 user: drh tags: rtree-enhancements
08:45
Minor fixes so that builds with SQLITE_MAX_WORKER_THREADS=0 work. check-in: e400bbbf user: dan tags: threads-experimental
07:30
Improve use of multiple threads in sqlite3VdbeSorterRewind(). check-in: e1bdc4b8 user: dan tags: threads-experimental
2014-04-13
19:28
Remove the unused second argument from sqlite3ExprCachePop(). Add an ALWAYS() on an always-true conditional in sqlite3VdbeResolveLabel(). check-in: ab23abf3 user: drh tags: trunk
19:15
Make sure column cache elements are cleared correctly when jumping over code for key generation in a partial index. Fix for ticket [2ea3e9fe6379fc3f6]. check-in: 3122b836 user: drh tags: trunk
16:10
Continuing work on the new custom query mechanism for r-tree. check-in: ca7357e6 user: drh tags: rtree-enhancements
2014-04-12
19:34
Fix many issues with new code. check-in: 62c406a0 user: dan tags: threads-experimental
17:44
Continuing clean-up of the R-Tree module in preparation for cutting in the new generalized query mechanism. check-in: 66c858f2 user: drh tags: rtree-enhancements
2014-04-11
23:14
Add the new interfaces to rtree, though they do not yet work. Add the "show_speedtest1_rtree.tcl" script for showing the test data used for the R-Tree tests of speedtest1. Change speedtest1 to generate better R-Tree test data. check-in: 0b702759 user: drh tags: rtree-enhancements
19:43
Avoid having the sorter merge too many PMAs at a time when incrementally merging data following a SorterRewind(). check-in: 98bf0307 user: dan tags: threads-experimental
17:41
Add the --verify option to speedtest1. Add verification test cases to the "rtree" testset and a case that uses a custom geometry callback. check-in: 9d485c42 user: drh tags: rtree-enhancements
16:14
Update comments in the R-Tree module in preparation for some big changes. Add an "rtree" performance test to speedtest1. check-in: 20a73ec0 user: drh tags: rtree-enhancements
2014-04-10
02:24
Modify the OR-clause handling so that it can safely deal with OR-clause with 17 or more terms. Fix for ticket [10fb063b1179be53ea0b53bb]. check-in: a67b5312 user: drh tags: trunk
2014-04-09
20:04
Experimental multi-threaded sorting changes to allow the sorter to begin returning items to the VDBE before all data is sorted. check-in: f9d5e09a user: dan tags: threads-experimental
2014-04-07
18:44
Experimental multi-threaded sorting changes to begin merging PMAs before SorterRewind() is called. Closed-Leaf check-in: cbfc0f6d user: dan tags: abandoned