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99 check-ins using file src/parse.y version 8de9b1da
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2024-04-02
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| 18:48 | Fix typos in comments. Provided ".wheretrace" debugging output for the interstage heuristic module. Do omit automatic index loops in the interstage heuristic. (Leaf check-in: 357d9513 user: drh tags: branch-3.28) | |
| 18:31 | Fix table-valued functions so that they will work as the right table in a LEFT JOIN. Ticket [2ae0c599b735d59e] (check-in: 1f97086d user: drh tags: branch-3.28) | |
| 11:54 | Add a heuristic in between the two solver() passes of the query planner that tries to prevent a very slow query plan in cases where the output row count estimate is imprecise. (check-in: 74b247d9 user: drh tags: branch-3.28) | |
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2023-11-29
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| 16:26 | Fix a duplicate assert() caused by the second cherrypick in the previous check-in. (check-in: f10d4fc4 user: drh tags: branch-3.28) | |
| 16:07 | Remove Window objects from the corresponding Select.pWin list when they are deleted, as they are, for example, when the ORDER BY clause is optimized out. (check-in: f9c6e6a7 user: drh tags: branch-3.28) | |
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2023-10-19
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| 21:05 | Ensure that when an ephemeral cursor is reopened with a second invocation of to OP_OpenEphemeral, the sequence counter is reset and the cache marked as stale. Fix for [9cdc5c46]. (check-in: d4bfa8d2 user: drh tags: branch-3.28) | |
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2023-09-15
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| 20:04 | Drop support for the view-scan optimization as it was causing multiple performance regressions. In its place, reduce the estimated row count for DISTINCT subsqueries by a factor of 8. (check-in: 796a65fa user: drh tags: branch-3.28) | |
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2023-02-26
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| 11:52 | In the omit-unused-subquery-columns optimization, be sure to remove the EP_Skip and EP_Unlikely flags from the result set expressions that get nulled-out. dbsqlfuzz bf1d3ed6e0e0dd8766027797d43db40c776d2b15. Also fix an incorrect ".selecttrace" code block. (check-in: 83a7f13e user: drh tags: branch-3.28) | |
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2023-02-16
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| 21:01 | Fix an #ifdef that uses a different macro name from the main branch. (check-in: ad6ac5d3 user: drh tags: branch-3.28) | |
| 19:04 | Back-port omit-unused-subquery-column enhancements into the 3.28 branch. (check-in: 57a4e91f user: drh tags: branch-3.28) | |
| 14:29 | Do not compute result columns of subqueries that are never used. Make those columns NULL instead. This optimization potentially resolves the enhancement request described by [ticket baa5bb76c35a124c]. (check-in: 0163b697 user: drh tags: branch-3.28) | |
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2022-10-24
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| 13:50 | Improve the ability of the query planner to recognize covering indexes even on tables with more than 63 columns and where the index is over columns beyond the 63rd column. (check-in: 3d1992de user: drh tags: branch-3.28) | |
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2022-10-19
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| 11:22 | If a query uses an index where one or more of the columns of the index is an expression and if the corresponding expression is used elsewhere in the query, then strive to read the value of the expression out of the index, rather than recomputing it. This is the "Indexed Expression Optimizations". (check-in: 3da10328 user: drh tags: branch-3.28) | |
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2022-09-01
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| 10:41 | In the query planner, add a heuristic that will reduce the cost of a full table scan for a materialized view or subquery if the full scan is the outer-most loop. This is shown to speed up some queries. (check-in: e3754cc1 user: drh tags: branch-3.28) | |
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2022-08-10
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| 17:03 | Merge the branch-3.28a fixes into branch-3.28. (check-in: ba6bf331 user: drh tags: branch-3.28) | |
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2022-08-09
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| 20:22 | Fix a rounding error caused by scalar->logarithm->scalar conversion when using stat4 data to estimate some range scans. (check-in: 68d86f2b user: drh tags: branch-3.28) | |
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2021-07-13
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| 15:30 | Remove two incorrect assert() statements from the logic used to derive column names and types from subqueries. This allows the SQL associated with CVE-2020-13871 (ticket [c8d3b9f0a750a529]) to be tested. (Closed-Leaf check-in: d2e67220 user: dan tags: branch-3.28a) | |
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2021-07-12
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| 14:38 | Fix a defect in the query-flattener optimization identified by ticket [8f157e8010b22af0]. This fix is associated with CVE-2020-15358. (check-in: 9e001b63 user: dan tags: branch-3.28a) | |
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2020-10-22
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| 18:58 | Minor tweaks to query planning weights so that when STAT4 is enabled and functioning, a full table scan is more likely to be selected if that seems like the fastest solution. Only do this when STAT4 info is available because an error has a large potential downside. (check-in: 263293f1 user: drh tags: branch-3.28) | |
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2020-10-02
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| 13:57 | Import further corner-case fixes for the in-scan-vs-index or OP_SeekScan optimization from trunk. (check-in: c144d640 user: drh tags: branch-3.28) | |
| 12:11 | For the OP_SeekScan optimization, the OP_IdxGT does not necessarily come right after the OP_SeekGE. So use the P2 operand of OP_SeekScan to point to the first instruction after OP_IdxGT. Problem found by dbsqlfuzz. (check-in: ec37744c user: drh tags: branch-3.28) | |
| 02:07 | Disable the OP_SeekScan opcode of the in-scan-vs-index optimization when in PRAGMA reverse_unordered_selects mode, as the OP_SeekScan only works with forwards scans. Thanks to OSSFuzz for pointing out the problem to us. (check-in: 9a1cdf7e user: drh tags: branch-3.28) | |
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2020-09-30
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| 18:22 | Improved query optimization for multi-column indexes where the second or later columns are constrained by an IN operator and the earlier index columns limit the search to a small number of rows. Use the new OP_SeekScan opcode which does scanning of the relevant range of the index but gives up and falls back to doing a seek if the number of rows scanned grows to large, in order to guard against pathological cases where the estimated number of rows to be scanned is far too small. (check-in: f07ac3fb user: drh tags: branch-3.28) | |
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2020-09-01
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| 02:02 | Improvements to the IN-early-out optimization so that it works more efficiently when there are two or more indexed IN clauses on a single table. (check-in: 49b7631e user: drh tags: branch-3.28) | |
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2020-08-31
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| 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) | |
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2020-08-17
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| 21:03 | 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: 0ecda433 user: dan tags: branch-3.28) | |
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2020-05-06
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| 18:46 | Provide the SQLITE_DEFAULT_LEGACY_ALTER_TABLE compile-time option. (check-in: b2325a6e user: drh tags: branch-3.28) | |
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2020-01-17
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| 15:33 | More restrictions on changes to shadow tables when in defensive mode. (check-in: b302b260 user: drh tags: branch-3.28) | |
| 15:24 | Validate the type, name, and tbl_name fields of the sqlite_master table when loading the schema, unless writable_schema is engaged. (check-in: 3d13fbf2 user: drh tags: branch-3.28) | |
| 14:56 | Do not allow shadow tables to be dropped in defensive mode. (check-in: ad1f760f user: drh tags: branch-3.28) | |
| 14:30 | Import the 3.31.0-beta FTS3/4 code directly into the 3.28 branch, thus providing 3.28 with all the latest 3.31 fixes. FTS3 has not been enhanced to use any core functionality that was not already available in 3.23, so no modifications were made to FTS3 sources for this import. (check-in: be4269c6 user: drh tags: branch-3.28) | |
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2019-07-18
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| 20:55 | Fix a problem where self-joins on views that are aggregate queries may return the wrong result. Cherrypick of [74ef97bf51dd531a]. (check-in: 2f0a564f user: mistachkin tags: branch-3.28) | |
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2019-06-03
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| 15:10 | Fix harmless compiler warning in lemon. (check-in: 3a052429 user: mistachkin tags: branch-3.28) | |
| 13:53 | Fix the count-of-view optimization so that it is (correctly) disabled for a query that includes a WHERE clause or a GROUP BY clause. Cherrypick of [05897ca48a40c6771]. (check-in: 583e5a0a user: mistachkin tags: branch-3.28) | |
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2019-04-25
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| 19:23 | Unless the "--freelist-corrupt" option is specified, do not have the .recover command attempt to recover data from pages that are on the database free-list. (check-in: 8d2f52bb user: dan tags: dbdata) | |
| 16:20 | Fix a bug preventing .recover from working on databases where the final page of the db is corrupt. (check-in: 959bbd11 user: dan tags: dbdata) | |
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2019-04-24
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| 20:48 | Improve the performance of the .recover command. (check-in: a5076831 user: dan tags: dbdata) | |
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2019-04-23
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| 20:48 | Have ".recover" handle "\r" and "\n" in the same way as ".dump". (check-in: f95f0f02 user: dan tags: dbdata) | |
| 18:03 | Fixes for the ".recover" shell command. (check-in: 8dcc1d89 user: dan tags: dbdata) | |
| 15:21 | Minor simplification of NULL value handling for STAT4. Cherrypick of [69bad9257f8db6a2] from trunk. (check-in: 442c177d user: mistachkin tags: branch-3.28) | |
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2019-04-22
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| 20:52 | Enhance the ".recover" command. Fix a problem with overflow pages in dbdata.c. (check-in: f193ca58 user: dan tags: dbdata) | |
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2019-04-20
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| 20:57 | Add the ".recovery" command to the shell tool. For recovering the maximum amount data from corrupt databases. Still needs work. (check-in: 7461d2e1 user: dan tags: dbdata) | |
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2019-04-18
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| 21:14 | Add the sqlite_dbptr virtual table to the dbdata extension. For querying the links between b-tree pages. (check-in: 3213a15f user: dan tags: dbdata) | |
| 19:21 | Minor simplification of NULL value handling for STAT4. (Closed-Leaf check-in: 5718a9d5 user: mistachkin tags: nullStat4) | |
| 17:37 | Undo change to 'analyze9.test' because the extra output can be useful for debugging. (Leaf check-in: f3081e59 user: mistachkin tags: msvc) | |
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2019-04-17
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| 23:56 | Fix a couple minor test issues. (check-in: 1f1866d1 user: mistachkin tags: msvc) | |
| 23:32 | Work around lack of a C99 feature in MSVC. (check-in: f6ebe1c2 user: mistachkin tags: msvc) | |
| 21:17 | Add the experimental dbdata extension. (check-in: a3ab5883 user: dan tags: dbdata) | |
| 21:12 | Small performance and size optimization in sqlite3WalFindFrame(). (check-in: 03f2e788 user: drh tags: trunk) | |
| 13:58 | Fix a typo in the CLI help output for the ".dump" command. (check-in: 57638248 user: drh tags: trunk) | |
| 13:23 | In the "pgidx" report from "showdb", also show the number of rows on each database btree page. (check-in: 2bda9dc4 user: drh tags: trunk) | |
| 12:29 | In the "pgidx" command of the showdb utility, try to identify orphaned pages and show when pages have been zeroed out. (check-in: eed701ef user: drh tags: trunk) | |
| 12:07 | Small performance improvement on the variable-length integer decoder: sqlite3GetVarint(). (check-in: 5df2bf62 user: drh tags: trunk) | |
| 11:34 | Faster and smaller implementation of sqlite3StrICmp(). (check-in: 7ac500fb user: drh tags: trunk) | |
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2019-04-16
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| 19:49 | Version 3.28.0 (check-in: 884b4b7e user: drh tags: trunk, release, version-3.28.0) | |
| 11:21 | Avoid a sanitizer error (pointer arithmatic overflow) in vdbesort.c. (check-in: af61a2fc user: dan tags: trunk) | |
| 10:51 | Avoid a sanitizer error in test1.c. Have releasetest.tcl/wapptest.tcl create a file called "makecommand.sh" that can be used to rerun a test from the command line. (check-in: 4de4480f user: dan tags: trunk) | |
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2019-04-15
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| 19:17 | Fix a bug in test module test_fs.c causing a segfault on OpenBSD. (check-in: ee886600 user: dan tags: trunk) | |
| 15:41 | Fix a problem with the user-auth extension and deserializing in-memory databases. (check-in: 09fa0b3c user: dan tags: trunk) | |
| 15:35 | Merge recent changes from trunk into reuse-schema (check-in: 5c6c9e7f user: drh tags: reuse-schema) | |
| 15:17 | Merge the latest trunk enhancements. (check-in: 8950f119 user: drh tags: wal2) | |
| 14:49 | Bring in the latest enhancements from trunk. (check-in: 378230ae user: drh tags: apple-osx) | |
| 13:59 | Fix a test script problem in fts5corrupt3.test. (check-in: 734192d8 user: dan tags: trunk) | |
| 13:51 | Update tool/symbols.sh to ignore symbols from sessions and rebaser and to not try to compile with ICU which is not available on all platforms. (check-in: 0bab4ece user: drh tags: trunk) | |
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2019-04-14
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| 00:40 | Remove a stray tab from the source code. (check-in: 0ada58e9 user: drh tags: trunk) | |
| 00:34 | Fix an obsolete comment and other minor issues from code inspection. (check-in: cd084427 user: drh tags: trunk) | |
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2019-04-13
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| 16:50 | Fix a harmless compiler warning in test logic. (check-in: c3932e66 user: drh tags: trunk) | |
| 16:43 | Fix the fts3varint.test script so that it works even on versions of TCL for which Tcl_GetWideIntFromObj() does not work. (check-in: 53f787ad user: drh tags: trunk) | |
| 16:35 | Fix a test script problem in fts5corrupt3.test. (check-in: 858f6227 user: dan tags: trunk) | |
| 15:07 | Partially revert the test file changes in [4371a0c46e]. It is no longer required following [93ae382e97c23c90]. (check-in: 593a7e6e user: dan tags: trunk) | |
| 14:17 | Fix additional compiler warnings introduced by the previous check-in and found by MSVC. (check-in: 6fc0deff user: drh tags: trunk) | |
| 14:07 | Fixes for harmless compiler warnings. (check-in: c28c973a user: drh tags: trunk) | |
| 04:38 | Use the 64-bit memory allocator interfaces in extensions, whenever possible. (check-in: 07ee06fd user: drh tags: trunk) | |
| 04:01 | Enforce the SQLITE_LIMIT_COLUMN limit on virtual tables. (check-in: 0b6ae032 user: drh tags: trunk) | |
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2019-04-12
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| 20:33 | Add the socketvfs test extension. (Leaf check-in: f5b3ce94 user: dan tags: socketvfs) | |
| 16:25 | Test case changes so that they work with both Tcl8.6 and Tcl8.7. (check-in: 7b771405 user: drh tags: trunk) | |
| 13:40 | Tweaks to wapptest.tcl: Ensure that the "Debug" checkbox is disabled unless the app is in "config" state, and have Debug variants run "test" instead of "fulltest". (check-in: dd248c18 user: dan tags: trunk) | |
| 12:10 | Fix minor problems in tcl test scripts. (check-in: 56b66418 user: dan tags: trunk) | |
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2019-04-11
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| 19:07 | Add the test/wapptest.tcl script, an alternative to releasetest.tcl that uses wapp to provide the user-interface. (check-in: edd87cd6 user: dan tags: trunk) | |
| 19:04 | Merge trunk changes into this branch. (Closed-Leaf check-in: d805fc0c user: dan tags: wapptest) | |
| 19:03 | Further tweaks to wapptest.tcl. Add the ability to run the extra (n)debug tests that releasetest.tcl runs. (check-in: ec9c4f6d user: dan tags: wapptest) | |
| 17:06 | Remove the vfslog.c extension from the testfixture target in main.mk, as that extension has no TCL bindings and is inaccessible. (check-in: d71f8bbc user: drh tags: trunk) | |
| 16:54 | Fix RBU so that it does not write rows that should be excluded into partial indexes (corrupting the database). (check-in: 31eb27f4 user: dan tags: trunk) | |
| 06:50 | Fix the checksymbols target in Makefile.in. (check-in: 1956eb34 user: dan tags: wapptest) | |
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2019-04-10
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| 19:45 | Have wapptest.tcl display the name, OS and architecture of the host. (check-in: c47e53b4 user: dan tags: wapptest) | |
| 18:56 | Various fixes for the wapptest.tcl script. (check-in: cbf42365 user: dan tags: wapptest) | |
| 18:29 | Update the list of OMIT options in the omittest.tcl script. (check-in: f294cfc1 user: drh tags: trunk) | |
| 13:24 | Further refinement of the sqlite3VdbeMEmExpandBlob() fix of check-in [df58774e994bd] to prevent a reference to an unused variable - problem discovered by Valgrind. (check-in: 09435b57 user: drh tags: trunk) | |
| 12:02 | Change the name of some internal testing interfaces to avoid a name conflict in AIX. (check-in: c1cae7e7 user: drh tags: trunk) | |
| 00:58 | Do not place arbitrary restrictions on the length of the failure message for a uniqueness constraint. (check-in: 037da798 user: drh tags: trunk) | |
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2019-04-09
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| 21:37 | New test case for SQLITE_TOOBIG errors. (check-in: 4c77fbbe user: drh tags: trunk) | |
| 21:32 | Improved reporting of SQLITE_TOOBIG errors while parsing. (check-in: ea2d4b65 user: drh tags: trunk) | |
| 20:50 | Fix a problem caused by a small SQLITE_LIMIT_LENGTH value and a CREATE TABLE with a very large name. (Closed-Leaf check-in: 9b5d4088 user: dan tags: toobig-fix) | |
| 19:53 | Add test/wapptest.tcl, a wapp alternative to releasetest.tcl. (check-in: a4af0c2f user: dan tags: wapptest) | |
| 01:26 | Use an unsigned integer to count free pages in btree.c:freePage2(). (check-in: 88204085 user: drh tags: trunk) | |
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2019-04-07
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| 18:21 | Make the testcase() macro added in the previous check-in reachable for testing. (check-in: 80704a16 user: drh tags: trunk) | |
| 18:04 | Fix a faulty assert() in the sqlite3VdbeMemExpandBlob() routine. (check-in: df58774e user: drh tags: trunk) | |
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2019-04-06
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| 15:38 | Fix two assert() statements in fts5 that are only true if the database is not corrupt. (check-in: edb095a9 user: dan tags: trunk) | |
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2019-04-05
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| 21:17 | Remove some stale references to the addopcodes.tcl script from documentation. (check-in: c0381b0b user: drh tags: trunk) | |