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56 events for the month beginning 2020-08-01 by user drh
Following month ↑|
2020-08-31
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| 20:59 | • Edit [8301da31d08b7467|8301da31]: Move to branch branch-3.28-in-early-out. (artifact: e523a038 user: drh) | |
| 19:58 | Merge the SEEK_COUNT instrumentation enhancement from trunk. (check-in: 689ede95 user: drh tags: in-early-out-fail) | |
| 19:19 | An attempt to improve the performance of the IN-early-out optimization (see check-in [09fffbdf9f2f6ce3]) by avoiding unnecessary calls to the b-tree search algorithm in OP_IfNoHope when the index key is at hand and the same answer can be obtained by doing a quick key comparison. Update: Experiment did not work out. (Closed-Leaf check-in: 8301da31 user: drh tags: branch-3.28-in-early-out-fail) | |
| 18:49 | New test-control that returns the number of calls to sqlite3BtreeMovetoUnpacked() on the main database and then resets the counter. This only works for SQLITE_DEBUG builds. (check-in: dca5b919 user: drh tags: trunk) | |
| 16:31 | An attempt to improve the performance of the IN-early-out optimization (see check-in [09fffbdf9f2f6ce3]) by avoiding unnecessary calls to the b-tree search algorithm in OP_IfNoHope when the index key is at hand and the same answer can be obtained by doing a quick key comparison. Update 2020-08-31: This experiment did not work out. A better approach is now on trunk. (check-in: e9d983c6 user: drh tags: in-early-out-fail) | |
| 12:29 | Fix the documentation for the OP_IdxGT family of opcodes to show that the P5 operand is not used. (check-in: 62f7d2a6 user: drh tags: trunk) | |
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2020-08-28
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| 13:10 | Update Lemon documentation. Patches from sgbeal. (check-in: f5dc8344 user: drh tags: trunk) | |
| 12:58 | Fix a couple of unreachable branches. (check-in: f2d26f2b user: drh tags: trunk) | |
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2020-08-27
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| 20:55 | Remove a (harmless) redundant variable from the CLI implementation. (check-in: 3f7bbb84 user: drh tags: trunk) | |
| 18:36 | Include the original text of the CHECK constraint in the error message for anonymous CHECK constraints. (check-in: 5ce34a95 user: drh tags: trunk) | |
| 16:28 | • Edit [aafb7a21041090e5|aafb7a21]: Edit check-in comment. (artifact: 26da0582 user: drh) | |
| 16:28 | Apply the same fix for ticket [9eda2697f5cc1aba] to text-to-integer conversions that was done for floating point conversions by check-in [1c76f1d8ec0937a2]. (check-in: aafb7a21 user: drh tags: trunk) | |
| 16:06 | • Edit [1c76f1d8ec0937a2|1c76f1d8]: Edit check-in comment. (artifact: 8ebd8e93 user: drh) | |
| 13:33 | • Closed ticket [be31cf00]: Unexpected result for % and '1E1' plus 3 other changes (artifact: 928fed83 user: drh) ... 1 similar event omitted. | |
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2020-08-26
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| 19:07 | Enhance the ".databases" command in the CLI so that it shows the result of sqlite3_db_readonly() and sqlite3_txn_state() for each database file. (check-in: 0ffd16d2 user: drh tags: trunk) | |
| 10:50 | If the argument to the ".read" command in the CLI begins with "|" then run the remainder of the argument as a command and read input from the output of that command. (check-in: 6c716f4b user: drh tags: trunk) | |
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2020-08-25
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| 19:09 | Add support for the sqlite3_txn_state() interface. (check-in: ad195e3d user: drh tags: trunk) | |
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2020-08-24
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| 23:44 | Reduce the N in the logN term for the sorting cost associated with computing DISTINCT by B-Tree by half, under the assumption that the DISTINCT will eliminate about half the rows of output. This is really a wild guess. But we do not have any better way of estimating what the row-count reduction due to DISTINCT will actually be. (check-in: 8787417e user: drh tags: trunk) | |
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2020-08-19
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| 23:51 | Try to make SQLite easier to compiler for Mac Catalyst. See forum post 803387a1c5. (check-in: e1595a20 user: drh tags: trunk) | |
| 23:32 | Do not skip over TK_IF_NULL_ROW operators when bypassing TK_COLLATE operators. Fix to check-in [ac31edd3eeafcef4] which was itself a fix for ticket [45f4bf4eb4ffd788]. (check-in: 871f2ddc user: drh tags: trunk) | |
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2020-08-17
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| 09:11 | Fix the -quote option on the CLI to set the correct column separator. (check-in: c778f829 user: drh tags: trunk) | |
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2020-08-16
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| 00:30 | Optimization to sqlite3BeginWriteOperation(). (check-in: 2173d4c6 user: drh tags: trunk) | |
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2020-08-15
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| 23:48 | Optimization of the sqlite3SrcListDelete() routine. (check-in: 1b4acd1a user: drh tags: trunk) | |
| 22:23 | Remove more unnecessary sqlite3GetVdbe() calls, replacing them with assert()s. (check-in: b7dc9321 user: drh tags: trunk) | |
| 21:55 | Avoid unnecessary calls to the sqlite3GetVdbe() routine. Add assert() statements to prove each call is unnecessary. (check-in: 86d3790c user: drh tags: trunk) | |
| 19:58 | Omit the unnecessary not-NULL check on the upper bound of a forward index range scan. The subsequent OP_IdxGT will always catch the NULL. Similarly, omit the not-NULL check on the lower bound of a reverse index range scan, as the SeekLE opcode will disallow the NULL. (check-in: e51ecadc user: drh tags: trunk) | |
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2020-08-14
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| 21:51 | When doing an UPDATE or DELETE using a multi-column index where only a few of the earlier columns of the index are useful for the index lookup, postpone doing the main table seek until after all WHERE clause constraints have been evaluated, in case those constraints can be covered by unused later terms of the index, thus avoiding unnecessary main table seeks. (check-in: 7fee0b10 user: drh tags: trunk) | |
| 21:37 | Update the version number to 3.34.0 for the next development cycle. (check-in: 70f34f3d user: drh tags: trunk) | |
| 21:32 | Optimizations to the logic that converts main table accesses into equivalent index accesses. Code is now slightly smaller and faster than trunk. (Closed-Leaf check-in: 611b6404 user: drh tags: delete-bytecode-optimization) | |
| 20:04 | For UPDATE and DELETE, use OP_DeferredSeek always. If the seek must later be resolved, add the OP_FinishSeek opcode after all WHERE clause terms have been processed. This obviates the need for the WHERE_SEEK_TABLE and WHERE_SEEK_UNIQ_TABLE flags to sqlite3WhereBegin() and the ensuing complication, and it allows the covering index optimization to be used further into WHERE clause processing. (check-in: a495f60d user: drh tags: delete-bytecode-optimization) | |
| 17:39 | Experimental change to try to get some DELETE operations to access values using the index rather than the main table, so as to avoid unnecessary main table seeks. (check-in: 2f7cb6ab user: drh tags: delete-bytecode-optimization) | |
| 13:55 | Merge the 3.33.0 release into the reuse-schema branch. (check-in: e456d437 user: drh tags: reuse-schema) | |
| 13:23 | Version 3.33.0 (check-in: fca8dc8b user: drh tags: trunk, release, version-3.33.0) | |
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2020-08-12
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| 16:19 | Improvement on the previous fix. (check-in: f6cffa2d user: drh tags: trunk) | |
| 15:39 | Fix an assertion() fault in ALTER TABLE found by OSSFuzz. Test case in TH3. (check-in: 41de742c user: drh tags: trunk) | |
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2020-08-11
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| 21:53 | Fix harmless USAN warnings from gcc9. (check-in: 72c4c69f user: drh tags: trunk) | |
| 18:17 | New test cases for the use of the ieee754 and decimal extensions in the CLI. (check-in: bc1590f3 user: drh tags: trunk) | |
| 17:20 | Minor comment fixes. No changes to code. (check-in: 533aeb90 user: drh tags: trunk) | |
| 16:46 | Remove an unused #define from sqliteInt.h. (check-in: d5b254f9 user: drh tags: trunk) | |
| 14:55 | Merge all changes since the 3.32.0 release into the reuse-schema branch. (check-in: b1a77b7e user: drh tags: reuse-schema) | |
| 14:54 | • Edit [dc081336f0817ac9|dc081336]: Move to branch reuse-schema-3.32. (artifact: 3285cd46 user: drh) | |
| 13:22 | Merge all the latest changes into the begin-concurrent-pnu-wal2 branch. (check-in: ebefcb86 user: drh tags: begin-concurrent-pnu-wal2) | |
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2020-08-10
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| 21:30 | Merge recent trunk fixes into the begin-concurrent-pnu branch. (check-in: 2ae78c99 user: drh tags: begin-concurrent-pnu) | |
| 21:16 | Merge recent trunk enhancements into begin-concurrent. (check-in: ed4c742c user: drh tags: begin-concurrent) | |
| 21:01 | Simplify #ifdefs associated with Parse.eParseMode. Fix an #ifdef error associated with SQLITE_OMIT_AUTOVACUUM. (check-in: 5bbd4bdd user: drh tags: trunk) | |
| 14:18 | Fix harmless compiler warnings that surface in newer versions of GCC. (check-in: 9d670a31 user: drh tags: trunk) | |
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2020-08-09
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| 17:58 | Fix a harmless compiler warning. (check-in: 6f91769f user: drh tags: trunk) | |
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2020-08-08
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| 20:15 | Fix the check-in at [41474548ef3f7454] so that it computes the pointer in time for error checking at the end of the routine in the case of a non-OOM error. (check-in: 13d2fed7 user: drh tags: trunk) | |
| 17:55 | Move a pointer computation until after OOM checks to avoid a nuisance USAN warning. (check-in: 41474548 user: drh tags: trunk) | |
| 15:40 | Update requirement marks due to wording improvements in the documentation. (check-in: bf875a1c user: drh tags: trunk) | |
| 00:44 | Reorder declarations in the decimal extension for C89. (check-in: eface2da user: drh tags: trunk) | |
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2020-08-07
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| 19:52 | Do the oversize-WAL corruption test before the size hint is issued. (check-in: fdc5fb90 user: drh tags: trunk) | |
| 14:47 | Add the --checkpoint option to speedtest1. (check-in: 4cffa9bb user: drh tags: trunk) | |
| 14:22 | Fix compilation issues with MSVC. (check-in: c5a7e6d2 user: drh tags: trunk) | |
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2020-08-06
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| 16:45 | Fix the columnar output modes in the CLI so that they work with parameters. See https://sqlite.org/forum/forumpost/17ba6aac24 for details of the problem fixed. (check-in: d573aa9b user: drh tags: trunk) | |