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74 events for the month beginning 2017-09-01 by user drh
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2017-09-30
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| 11:47 | More details in the header comment of pushDownWhereTerms(). No changes to code. (Closed-Leaf check-in: 92848623 user: drh tags: prefer-coroutine-sort-subquery) | |
| 10:50 | Make sure the SQLITE_Stat34 optimization switch is always 0x800, a value which is hard-coded in the TH3 test suite. (check-in: 6aed4ea3 user: drh tags: prefer-coroutine-sort-subquery) | |
| 01:25 | Fix unreachable conditionals and revise a testcase that was made obsolete by the changes on this branch. (check-in: 71f0adf7 user: drh tags: prefer-coroutine-sort-subquery) | |
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2017-09-29
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| 22:13 | Always render a subquery that is not part of a join as a co-routine. (check-in: 6b1651d7 user: drh tags: prefer-coroutine-sort-subquery) | |
| 16:08 | Merge the query flattener comment improvements from trunk. (check-in: f62cd4d9 user: drh tags: prefer-coroutine-sort-subquery) | |
| 16:07 | Clean up the comments on the query flattener to more clearly and accurately express the conditions under which the flattener is able to run. (check-in: 0840f9f8 user: drh tags: trunk) | |
| 14:31 | Merge changes from trunk. (check-in: 06f432fb user: drh tags: prefer-coroutine-sort-subquery) | |
| 12:44 | Make sure the 6th parameter to the authorizer callback for view subqueries has the correct view name. (check-in: 2a45bbc9 user: drh tags: trunk) | |
| 12:12 | Better names for subqueries in EXPLAIN comments. (check-in: 04ef40a8 user: drh tags: trunk) | |
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2017-09-28
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| 20:06 | Do not flatten subqueries that contain an ORDER BY or GROUP BY clause and can be implemented using a co-routine. (check-in: 042d655d user: drh tags: prefer-coroutine-sort-subquery) | |
| 18:32 | • Edit [ff2f5a31a2ac67a2|ff2f5a31]: Edit check-in comment. (artifact: 54bd1ea7 user: drh) | |
| 17:29 | Remove the (undocumented) query-planner control that prevents a "SELECT ALL" subquery in FROM clause from being implemented as a co-routine. This control was added by [a29e117d7ec], where it was called a "stop-gap". (check-in: ff2f5a31 user: drh tags: trunk) | |
| 16:56 | Fix over-length source code lines in select.c. No logic changes. (check-in: fd3267ef user: drh tags: trunk) | |
| 13:47 | Fix an issue introduced by check-in [4cd2a9672c59] (2017-03-03) that could allow a negative value in the 3rd parameter to memmove() when defragmentPage() is called on a btree page with a corrupted freeblock list. The corruption is now detected early and results in an SQLITE_CORRUPT return before the memmove() is reached. (check-in: 5b9ae693 user: drh tags: trunk) | |
| 01:58 | Add new routines to simplify dealing with collating sequences in expressions: sqlite3ExprNNCollSeq() and sqlite3ExprCollSeqMatch(). (check-in: 490e488e user: drh tags: trunk) | |
| 01:09 | Indexes on expressions with a COLLATE clause are able to satisfy an ORDER BY with the same COLLATE clause. (check-in: 04130018 user: drh tags: trunk) | |
| 00:01 | In two places, change the magic number -1 to its proper symbol XN_ROWID. (check-in: 80277d2f user: drh tags: trunk) | |
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2017-09-27
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| 16:51 | Disable tests for the LIKE optimization when ICU is enabled, since the LIKE optimization only works for the built-in LIKE operator and ICU overrides the built-in. (check-in: f5ef2e1b user: drh tags: trunk) | |
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2017-09-22
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| 20:18 | Merge in all the trunk enhancements of the previous 7 months. The LIKE optimization has stopped working when there is an ESCAPE - that problem will be addressed in a subsequent check-in. (Leaf check-in: 8d2a1cca user: drh tags: est_count_pragma) | |
| 12:52 | Partial backout of check-in [e0af9a904076]. It turns out we do need some extra space at the end of the record blob as an overrun area to use when decoding a maliciously malformed record. (check-in: 403b88a8 user: drh tags: trunk) | |
| 00:24 | Update the configure script so that it looks for tclsh8.7 ahead of tclsh8.6. (check-in: 0a12915b user: drh tags: trunk) | |
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2017-09-21
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| 20:43 | In the Windows VFS, when trying to open a database file read/write, if it fails check to see if the file exists and is read-only and immediately fall back to a read-only open attempt, rather than running the AV retry loop. (check-in: 5d03c738 user: drh tags: trunk) | |
| 20:03 | In the Windows VFS, do not emit an SQLITE_CANTOPEN error log message when falling back from SQLITE_OPEN_READWRITE to SQLITE_OPEN_READONLY. Wait until the open fails completely. (check-in: fa3f5bcc user: drh tags: trunk) | |
| 19:08 | Fix harmless UB in the ICU extension. (check-in: 68e9a840 user: drh tags: trunk) | |
| 14:03 | The sqlite3_snapshot_describe() interface useful for debugging snapshot logic. (Leaf check-in: 3fbfa9a8 user: drh tags: sqlite3_snapshot_describe) | |
| 13:11 | Fix a potential use of an uninitialized pointer in RTree following an OOM error. (check-in: fd4ec0cd user: drh tags: trunk) | |
| 10:24 | Fix a bug in tool/mksourceid.c: The mksourceid.c program was incorrectly including the "# Remove this line" line of the Fossil-generated "manifest" file in the SHA3 hash. That means that all SQLITE_SOURCE_IDs for trunk versions going back to check-in [30966d56] (2017-08-22) are incorrect. (check-in: 65765222 user: drh tags: trunk) | |
| 01:04 | Revert one performance improvement changes from check-in [3b3e32d4cd07] as it was causing a reference to an uninitialized value. (check-in: f8b1c64d user: drh tags: trunk) | |
| 00:49 | Fix the rendering of the P4_INTARRAY argument to the OP_IntegrityCk opcode in the output of EXPLAIN. (check-in: adc12c83 user: drh tags: trunk) | |
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2017-09-20
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| 18:47 | Size and performance optimization on sqlite3VdbeMemGrow(). (check-in: 4b3f7eac user: drh tags: trunk) | |
| 18:07 | The BLOB returned by sqlite3VdbeMemFromBtree() does not need to be zero-terminated. (check-in: e0af9a90 user: drh tags: trunk) | |
| 17:49 | Small size and performance optimization in the bytecode engine. (check-in: 3b3e32d4 user: drh tags: trunk) | |
| 10:47 | Improved resolution of large integer values in "CAST(x AS NUMERIC)". (check-in: 7f2bd4ff user: drh tags: trunk) | |
| 09:09 | Updates to the "lemon.html" document received from Andy Goth. (check-in: 5b2002f3 user: drh tags: trunk) | |
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2017-09-18
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| 18:17 | Add the sqlite3_mmap_warm() function as an extension in the ext/misc/mmapwarm.c source file. (check-in: 1b2de414 user: drh tags: trunk) | |
| 18:08 | Fix a typo in the MSVC makefile. (Closed-Leaf check-in: 3235835b user: drh tags: mmap-warm) | |
| 13:16 | Minor simplification of error message generation during compound query code generation. (check-in: a9447193 user: drh tags: trunk) | |
| 09:40 | The out-of-bounds read on recovery fix of check-in [378afa16381a222a] caused problems for some corner-case error conditions. This alternative fix appears to work better. (check-in: 74f399d8 user: drh tags: trunk) | |
| 00:18 | Fix the CSV virtual table extension so that it works when the default character is unsigned. (check-in: 42f07775 user: drh tags: trunk) | |
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2017-09-17
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| 19:45 | Do not make the assumption (as check-in [4da49a95c0f07] incorrectly did) that the ExprList returned by sqlite3ExprListDup() would never be passed into sqlite3ExprListAppend(). Include a new test case that shows this sometimes does happen. (check-in: 29227d00 user: drh tags: trunk) | |
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2017-09-16
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| 20:58 | Simplify the sqlite3VdbeGet() routine. Smaller, faster, and easier to maintain. (check-in: 5dbb255a user: drh tags: trunk) | |
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2017-09-15
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| 17:40 | Remove an unnecessary parameter from selectInnerLoop(). (check-in: dd95887f user: drh tags: trunk) | |
| 15:38 | Improved the header-comment documentation on sqlite3ExprCodeExprList(). No changes to code. (check-in: 5dc3ecb5 user: drh tags: trunk) | |
| 15:17 | Optimization to the ExprList object to make it slightly smaller and faster. (check-in: 4da49a95 user: drh tags: trunk) | |
| 14:36 | Fix a harmless comment typo. No changes to code. (check-in: f7f0bf1d user: drh tags: trunk) | |
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2017-09-14
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| 02:36 | Avoid an out-of-bounds read on a recovery attempt using a carefully crafted database and rollback journal with mismatched page sizes. The test case for this is in TH3. (check-in: 378afa16 user: drh tags: trunk) | |
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2017-09-13
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| 20:20 | Test case update due to PRAGMA integrity_check enhancements in [8525c30c]. No changes to code. (check-in: 43c6023b user: drh tags: trunk) | |
| 18:38 | Experimental sqlite3_stmt_retryable() interface. (Leaf check-in: ebada072 user: drh tags: sqlite3_stmt_retryable) | |
| 12:55 | Disable FTS3 matchinfo() tests that assume a littleEndian platform when running on bigEndian. (check-in: 87ccdf9c user: drh tags: trunk) | |
| 00:33 | Improvements to PRAGMA integrity_check for better detection of malformed records. Integrity_check now avoids returning SQLITE_CORRUPT on a corrupt record. Also includes microoptimizations that I stumbled over while working on integrity_check. (check-in: 8525c30c user: drh tags: trunk) | |
| 00:13 | PRAGMA integrity_check returns SQLITE_OK even if it encounters corruption while scanning indexes. (Closed-Leaf check-in: 81f62e99 user: drh tags: improved-integrity-check) | |
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2017-09-12
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| 20:09 | Add the highly-experimental "PRAGMA noop_update=TRUE" command. (check-in: afe45271 user: drh tags: begin-concurrent-pnu) | |
| 18:49 | Add the highly-experimental "PRAGMA noop_update=TRUE" command. (Leaf check-in: de2e3717 user: drh tags: pragma-noop-update) | |
| 15:05 | Fix an error in [b22cdd67] that can cause a negative infinity to be (rarely) reported as a positive infinity. (check-in: 9780b23c user: drh tags: trunk) | |
| 13:27 | Changes to (hopefully) get the build working with recent Intel compilers. (check-in: b22cdd67 user: drh tags: trunk) | |
| 00:24 | Make sure all connections are closed in the pragma.test script. Test change only - no changes to code. (check-in: d7b7f038 user: drh tags: trunk) | |
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2017-09-11
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| 23:55 | • Fixed ticket [cfa2c908]: Assertion fault in STAT4 on a double-negation plus 5 other changes (artifact: 1f00b87e user: drh) | |
| 23:47 | • Fixed ticket [b899b604]: Segfault on correlated subquery on the RHS of an IN operator in the WHERE clause plus 5 other changes (artifact: b9905e14 user: drh) | |
| 23:46 | New test case for ticket [b899b6042f97f52d]. (check-in: 9d91ee5e user: drh tags: trunk) | |
| 20:54 | Add support for new operators in virtual tables: !=, IS, IS NOT, IS NULL, and NOTNULL. (check-in: 3b7dbe9d user: drh tags: trunk) | |
| 19:47 | Refactor names of constants and functions associated with the auxiliary operators for xBestIndex. (Closed-Leaf check-in: 0fb992af user: drh tags: vtab-extra-ops) | |
| 18:37 | Minor adjustments to indentation and spacing for clarity. No changes to code. (check-in: d3153abd user: drh tags: vtab-extra-ops) | |
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2017-09-10
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| 01:06 | Simplifications to the PRAGMA integrity_check code generator. (check-in: 99b9140c user: drh tags: improved-integrity-check) | |
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2017-09-09
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| 22:46 | Simplification and performance improvement to sqlite3_reset(). (check-in: b6425d01 user: drh tags: improved-integrity-check) | |
| 20:38 | Improved detection of malformed records by PRAGMA integrity_check. (check-in: 8fa923ca user: drh tags: improved-integrity-check) | |
| 08:03 | Use a mutex-free PRNG for the random() and randomblob() SQL functions and for the randomness used during checkpoint operations. (Leaf check-in: e63d1a7c user: drh tags: mutex-free-randomness) | |
| 06:10 | Merge trunk enhancements (check-in: 6a0b9d9d user: drh tags: apple-osx) | |
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2017-09-07
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| 09:56 | Prevent a possible crash when trying to recover using a carefully corrupted \ and truncated rollback journal. (Test case in TH3) (check-in: 02828d71 user: drh tags: trunk) | |
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2017-09-04
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| 00:33 | Proposed fix for ticket [b899b6042f97f5] (check-in: c7f9f47b user: drh tags: trunk) | |
| 00:19 | Fix recent test cases in test/indexepxr2.test so that they work even without SQLITE_ENABLE_STAT4 and SQLITE_ENABLE_JSON1. (check-in: 03f3cc03 user: drh tags: trunk) | |
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2017-09-03
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| 23:27 | • New ticket [b899b604] Segfault on correlated subquery on the RHS of an IN operator in the WHERE clause. (artifact: 95580e0c user: drh) | |
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2017-09-01
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| 14:50 | Add the new sqlite3PagerUnrefPageOne() pager method to deal with the special case of unreferencing page1. (check-in: b2e2100c user: drh tags: trunk) | |
| 12:57 | Remove an obsolete optimization in pcache that due to more recent changes was recently making the code a little slower. (check-in: c4e7e175 user: drh tags: trunk) | |
| 12:18 | Small size and performance improvement in pcacheManageDirtyList() by not zeroing the PgHdr.pDirtyNext and PgHdr.pDirtyPrev pointers for PgHdr objects that are not on the dirty list. (check-in: 919863b1 user: drh tags: trunk) | |