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100 ancestors of [b9f91317]
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2014-04-30
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| 13:19 | Fix long-standing typos in comments. check-in: b9f91317 user: drh tags: experimental-costs | |
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2014-04-29
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| 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 | |
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2014-04-28
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| 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 | |
| 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 | |
| 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 | |
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2014-04-26
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| 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 | |
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2014-04-25
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| 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 | |
| 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 | |
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2014-04-24
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| 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 | |
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2014-04-21
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| 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 | |
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2014-04-18
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| 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 | |
| 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 | |
| 00:06 | 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 | |
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2014-04-14
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| 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 | |
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2014-04-13
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| 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 | |
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2014-04-10
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| 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 | |
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2014-04-04
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| 18:49 | Performance improvements when reading large blobs, especially if SQLITE_DIRECT_OVERFLOW_READ is defined. check-in: 2312eb6a user: drh tags: trunk | |
| 18:20 | Merge changes to the query planner that strive to ensure that any index usage that is a proper subset of some other index usage always has a slightly higher cost. check-in: 683dd379 user: drh tags: trunk | |
| 14:12 | Ensure the "PRAGMA journal_mode=WAL" works coming from any other journal_mode with ATTACH-ed databases. check-in: e54330b4 user: drh tags: trunk | |
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2014-04-03
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| 16:29 | Use OP_Copy instead of OP_SCopy when moving results out of a subquery, to prevent the subquery results from changing out from under the outer query. Fix for ticket [98825a79ce1456]. Problem introduced by check-in [1e64dd782a126f48d78]. check-in: d5513dfa user: drh tags: trunk | |
| 14:31 | Fix a typo in the "Synopsis:" comment for the OP_VFilter opcode. check-in: 48ecdd4a user: drh tags: trunk | |
| 00:32 | In the command-line shell, run set writable_schema before running the ".clone" command. check-in: 9d2ae634 user: drh tags: trunk | |
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2014-04-01
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| 01:24 | Remove an unnecessary conditional, replacing it with an assert(). Improvements to comments. Closed-Leaf check-in: 834bf1c3 user: drh tags: overflow-pgno-cache | |
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2014-03-31
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| 23:57 | Fix a compiler warning when SQLITE_DIRECT_OVERFLOW_READ is defined. Minor performance enhancement and size reduction. check-in: 96385dc4 user: drh tags: overflow-pgno-cache | |
| 22:03 | Merge in the latest changes and fixes from trunk. check-in: f6211540 user: drh tags: overflow-pgno-cache | |
| 20:05 | Remove an unnecessary conditional. Closed-Leaf check-in: 7473c4df user: drh tags: query-plan-experiments | |
| 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: b7830d23 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: ea8b0910 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: b3296267 user: drh tags: trunk | |
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2014-03-29
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| 21:16 | Experiments in picking better query plans, especially when the usage of one index is a subset of another. check-in: 8f869ca7 user: drh tags: query-plan-experiments | |
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2014-03-28
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| 14:41 | Disable the wal64k.test script for non-unix systems since it depends on unix-only features. check-in: 27deb6e4 user: drh tags: trunk | |
| 12:56 | Fix a harmless compiler warning. check-in: a4e47150 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: 7fa85eaa user: drh tags: trunk | |
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2014-03-27
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| 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: 9b4d7226 user: drh tags: trunk | |
| 14:05 | Enhance the logest.c utility with new operators: "dup", "inv", "log", and "nlogn". Provide help on an invalid input. check-in: b4bd2a06 user: drh tags: trunk | |
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2014-03-26
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| 15:14 | Add an extra test case for the potential buffer overread patched by [28ddecff04]. check-in: f585f5d7 user: dan tags: trunk | |
| 15:05 | Add a test case to verify that the previous change avoids excess buffer overread in sqlite3VdbeRecordCompare(). check-in: 2b28e8d5 user: drh tags: trunk | |
| 14:51 | Earlier detection of corruption in sqlite3VdbeRecordCompare() in order to avoid a potential buffer overread. check-in: 28ddecff user: drh tags: trunk | |
| 12:02 | Add an assert() and a comment to clarify the operation of the vdbeRecordCompareInt() routine. check-in: 851abdb8 user: drh tags: trunk | |
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2014-03-25
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| 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: 7922809e user: drh tags: trunk | |
| 17:45 | Add another performance test case to speedtest1. This case is another ORDER BY test but this time without LIMIT. check-in: 9ab7ffd5 user: drh tags: trunk | |
| 14:54 | Add an ORDER BY test case to speedtest1.c check-in: 58812264 user: drh tags: trunk | |
| 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: e6798871 user: drh tags: trunk | |
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2014-03-24
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| 16:30 | Remove unused variables Parse.nColCache and Parse.iColCache. check-in: 4d7551ce 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: 221f8f94 user: drh tags: trunk | |
| 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: db7d62c8 user: dan tags: trunk | |
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2014-03-23
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| 16:29 | Avoid a possible use of an uninitialized variable following an I/O or OOM error. check-in: 641408a1 user: drh tags: trunk | |
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2014-03-22
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| 02:19 | Clear the sort-order flags on the KeyInfo object associated with the OP_Compare/OP_Jump of the block-sort logic, in order to make the OP_Jump fully testable. check-in: 9b2838f2 user: drh tags: trunk | |
| 01:52 | Increase the version number to 3.8.5. check-in: 9760879d user: drh tags: trunk | |
| 00:27 | Fix the ORDER BY optimization logic so that it will do a block-sort on a partial DESC ORDER BY. This enhancement uncovered a memory leak in pushUntoSorter() which is also fixed. check-in: c36f7461 user: drh tags: trunk | |
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2014-03-21
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| 20:58 | Add the ability to use indices for the first few terms of an ORDER BY clause, then sort in batches to handle the later terms. check-in: fa06a6fe user: drh tags: trunk | |
| 19:56 | Change the names of SRT_DistTable and SRT_Table used by CTE to more meaningful SRT_DistFifo and SRT_Fifo, respectively. Simplify the IgnorableOrderby() macro in the process. check-in: 45d8cc67 user: drh tags: trunk | |
| 19:27 | Avoid leaking memory in an obscure case where the flattener adds an ORDER BY clause to the recursive part of a recursive query. check-in: 1f413aca user: dan tags: trunk | |
| 18:45 | Merge the OFFSET-on-query-without-FROM fix from trunk. check-in: 71e9ae72 user: drh tags: orderby-planning | |
| 18:16 | Fix the OFFSET clause so that it works correctly on queries that lack a FROM clause. Ticket [07d6a0453d4ed8]. check-in: 179ef816 user: drh tags: trunk | |
| 15:24 | New test case for block-sorting. check-in: e70cfa28 user: drh tags: orderby-planning | |
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2014-03-20
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| 20:56 | Merge trunk fixes for "x IN (?)" handling. check-in: eca35871 user: drh tags: orderby-planning | |
| 19:04 | Remove a testcase() that is now always true due to the "x IN (?)" optimization. Add an ALWAYS() around a conditional in the parser that cannot be false. check-in: d5a1530b user: drh tags: trunk | |
| 18:56 | Only use the direct-overflow-read optimization if all data from the overflow page in question is being read. check-in: d8e1f75d user: dan tags: overflow-pgno-cache | |
| 18:45 | Fix the EXPLAIN indenter in the command-line shell to correctly handle NextIfOpen and PrevIfOpen opcodes. check-in: 01944c53 user: drh tags: trunk | |
| 17:03 | The "x IN (?)" optimization in check-ins [2ff3b25f40] and [e68b427afb] is incorrect, as demonstrated by the in4-5.1 test case in this check-in. The "COLLATE binary" that was being added to the RHS of IN was overriding the implicit collating sequence of the LHS. This change defines the EP_Generic expression node property that blocks all affinity or collating sequence information in the expression subtree and adds that property to the expression taken from RHS of the IN operator. check-in: 2ea4a9f7 user: drh tags: trunk | |
| 15:14 | Fix harmless compiler warnings. check-in: b1435f26 user: drh tags: trunk | |
| 14:56 | Previous check-in is not quite correct. "x IN (?)" is not exactly the same as "x==?" do to collation and affinity issues. The correct converstion should be to "x==(+? COLLATE binary)". The current check-in fixes this problem and provides test cases. Ticket [e39d032577df69] check-in: 2ff3b25f user: drh tags: trunk | |
| 13:26 | Convert expressions of the form "X IN (?)" with exactly one value on the RHS of the IN into equality tests: "X=?". Add test cases to verify that statements work correctly on this corner case. Fix for ticket [e39d032577df6942]. check-in: e68b427a user: drh tags: trunk | |
| 12:17 | Fix an unnecessarily obtuse use of a bitmask flag. check-in: ca314081 user: drh tags: trunk | |
| 09:42 | Add a test to ensure os_unix.c works with 64KiB OS pages. Closed-Leaf check-in: e3d2be3b user: dan tags: shm-mapping-fix | |
| 08:59 | Add an experimental fix to 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: 6f3a5c24 user: dan tags: shm-mapping-fix | |
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2014-03-19
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| 23:42 | Merge the vdbesort.c optimization from trunk. check-in: e4bfffb9 user: drh tags: orderby-planning | |
| 23:24 | Fix query planner weights associated with choosing block-sorting. Fix block sorting of tables with collating functions. Fix various test cases. All "veryquick" tests are now passing, though more tests need to be added. check-in: 01afbf97 user: drh tags: orderby-planning | |
| 20:01 | Avoid some unnecessary calls to sqlite3VdbeRecordUnpack() that were being made when merging data from two or more temp files together in vdbesort.c check-in: 707ea170 user: dan tags: trunk | |
| 17:41 | Make it possible for block-sort to use the OP_SorterOpen sorter in addition to a generic OP_OpenEphemeral. check-in: 7ce2daaf user: drh tags: orderby-planning | |
| 16:56 | Fix a problem in the block-sort logic that can arise if the VDBE opcode array is resized while the block-sort logic is being coded. "make test" now runs to completion, though there are still 17 failures. check-in: 62f3a220 user: drh tags: orderby-planning | |
| 15:17 | Avoid reusing temporary registers in co-routines when doing block-sorting. check-in: 463d921b user: drh tags: orderby-planning | |
| 14:30 | Make sure the where.c query planner never reports that the number of ORDER BY terms that are satisfied by indices is negative. check-in: b186d8d1 user: drh tags: orderby-planning | |
| 14:10 | First attempt at getting block-sort to work. This is an incremental check-in. There are many problems still to be worked out. check-in: 59742dd4 user: drh tags: orderby-planning | |
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2014-03-18
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| 20:33 | Make the partial-ORDER-BY information in the query planner available to the SELECT code generator. Still doesn't make a difference in the generated code. check-in: e258df23 user: drh tags: orderby-planning | |
| 18:59 | Adjust the query planner to keep track of the number of ORDER BY terms satisfied. Still doesn't do anything with this information. Some tests fail after this check-in, but all failures are believed to be benign. The failures will be addressed at a later stage. check-in: 59d49b7f user: drh tags: orderby-planning | |
| 15:30 | Experiments with the optimization of ORDER BY and GROUP BY clauses. check-in: b1509025 user: drh tags: orderby-planning | |
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2014-03-17
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| 15:06 | Clean up some obsolete "register" declarations in printf.c. check-in: ecd9d3f9 user: drh tags: trunk | |
| 14:24 | Performance enhancements and size reduction for sqlite3VXPrintf() check-in: eb071eb5 user: drh tags: trunk | |
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2014-03-14
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| 11:46 | Fix a harmless compiler warning that crops up with SQLITE_MAX_MMAP_SIZE=0. check-in: 1277932b user: drh tags: trunk | |
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2014-03-12
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| 19:38 | Fix an obscure bug causing sqlite3_close() to fail if there are virtual tables on the disconnect list when it is called. check-in: 6504aa47 user: dan tags: trunk | |
| 19:20 | Changes to FTS to ensure that it does not access the database from within the xConnect method. check-in: c67a52c3 user: dan tags: trunk | |
| 12:44 | Prevent the rtree module from reading sqlite_stat1 data from the wrong database. check-in: 7ce03c1b user: dan tags: trunk | |
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2014-03-11
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| 23:44 | Remove a stray C99-style comment. check-in: f500e87d user: drh tags: overflow-pgno-cache | |