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SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

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2016-02-25
20:17
Disable the RESTRICT foreign key action if "PRAGMA defer_foreign_keys" is set. check-in: 9ffff484 user: dan tags: trunk
18:40
Query planner improvements: Take the LIMIT into account when estimated the cost of an ORDER BY. Avoid automatic indexes on query loops that are expected to run less than twice. See [9e2b2681] for a later enhancement. check-in: bf46179d user: drh tags: trunk
18:22
Improvement on the previous check-in: disallow automatic indexes for any loop that is expected to run less than twice. Closed-Leaf check-in: aab53a21 user: drh tags: planner-improvements
18:03
Do not use an automatic index on an outer loop that only runs once. check-in: 5957e793 user: drh tags: planner-improvements
16:04
Take the LIMIT clause into account when estimating the cost of sorting. check-in: d491745c user: drh tags: planner-improvements
13:33
In the command-line shell: When the ".import" command is creating a new table using column names from the first row of CSV input, make sure double-quotes in the name are properly escaped. check-in: 2e67a1c8 user: drh tags: trunk
2016-02-24
20:16
Extend [3e9ed1ae] so that covering indexes on WITHOUT ROWID tables are also identified. check-in: e721975f user: dan tags: trunk
19:57
Change a char* to const char* in order to suppress some harmless compiler warnings. check-in: 56f62e34 user: drh tags: trunk
17:18
When an index completely covers a table, it can be used as a covering index even if columns past the 63rd column are indexed and accessed. check-in: 3e9ed1ae user: drh tags: trunk
16:14
Fix a problem with handling identifiers that start with "x" if SQLITE_OMIT_BLOB_LITERAL is defined. check-in: b65217c6 user: dan tags: trunk
15:43
Identify indexes that completely cover their table. Closed-Leaf check-in: 71d488b5 user: drh tags: covering-index
2016-02-23
16:28
Add the SQLITE_BITMASK_TYPE compile-time option. check-in: 0064a8c7 user: drh tags: trunk
2016-02-22
23:44
Remove code not needed now that synchronous=OFF database files no longer trigger the use of a master journal. check-in: aa9f4c62 user: drh tags: trunk
23:14
Avoid an unnecessary seek operation some corner-case skip-scan operations. check-in: 2a6003a9 user: drh tags: trunk
21:19
Clearer presentation of the logic. No functional changes. Closed-Leaf check-in: a3dcf6db user: drh tags: skip-scan-improvement
20:52
Avoid an unnecessary seek operation on some corner-case skip-scans. check-in: 38e837e6 user: drh tags: skip-scan-improvement
16:04
Always use the sqlite3VdbeDeleteAuxdata() routine for clearing auxdata on function parameter, rather than having a separate deleteAuxdataFromFrame() for doing the job for trigger frames. check-in: 64386fa3 user: drh tags: trunk
14:57
Avoid creating a master journal unless two or more databases in the transaction can actually benefit from that master journal. check-in: 3ed18906 user: drh tags: trunk
13:23
Change magic numbers associated with synchronous settings to named constants. check-in: 9230ba6c user: drh tags: trunk
09:45
Add an extra test case for the change in commit [c4295725]. check-in: a48ac4c3 user: dan tags: trunk
2016-02-19
19:46
Further enhancements to the MSVC batch build tool. check-in: 06f1495f user: mistachkin tags: trunk
19:29
Use the arguments to NMAKE consistently in the MSVC batch build tool. check-in: 480e5049 user: mistachkin tags: branch-3.11
19:03
Enhance clean target in the MSVC makefiles. check-in: 66a9ad4a user: mistachkin tags: branch-3.11
18:54
Use a separate list of aux-data structures for each trigger program at the VDBE level. Fix for [dc9b1c91]. check-in: c4295725 user: dan tags: trunk
16:19
Enhance speedtest1 to display the particular version of SQLite under test. check-in: 0cb728c1 user: drh tags: trunk
15:17
Fix a couple of harmless warnings generated by clang. check-in: a1a3ff1f user: drh tags: trunk
14:20
Fix a harmless uninitialized variable access. check-in: 398522e6 user: drh tags: trunk
14:10
Make sure WhereClause objects are fully initialized before use when planning OR queries. check-in: 16205302 user: drh tags: trunk
13:29
Fix (harmless) compiler warnings in some of the TCL-based test code. check-in: 7c26d2b4 user: drh tags: trunk
13:20
Add an SQLITE_DISABLE_INTRINSIC #ifdef to the sqlite3Put4Byte() function. check-in: ba9c6827 user: drh tags: trunk
13:19
Omit the unused yyzerominor constant. check-in: 60ad68a9 user: drh tags: trunk
10:18
Add an "#ifndef SQLITE_AMALGAMATION" guard around a typedef in fts5_test_mi.c to avoid redefining "u32" if it is compiled as part of the amalgamation. check-in: f9c49ba1 user: dan tags: trunk
05:07
Modify the MSVC batch build tool to support the MSVC autoconf Makefile. check-in: 72b10e5e user: mistachkin tags: branch-3.11
00:48
Further improvements to the MSVC batch build tool. check-in: b9626b59 user: mistachkin tags: trunk
00:47
Further improvements to the MSVC batch build tool. check-in: 90dd6eb1 user: mistachkin tags: branch-3.11
2016-02-18
21:15
Correct the install location for the UWP VSIX package. check-in: f74de325 user: mistachkin tags: trunk
21:00
Correct the install location for the UWP VSIX package. check-in: b47d0302 user: mistachkin tags: branch-3.11
14:49
Avoid a potential buffer overrun if an SQL statement being parsed ends with an illegal "!" token. (This problem was detected by fuzzcheck running under valgrind. The problem was introduced by check-in [9570b6b43df3], two days ago and has not appeared in a release.) check-in: 2a8d97e7 user: drh tags: trunk
14:03
Improved handling of the -v option on the fuzzcheck test program. check-in: c8cd7804 user: drh tags: trunk
13:32
Remove an unnecessary "include <tcl.h>" line from fts5_test_mi.c. check-in: 31d8b69e user: dan tags: trunk
01:29
Add extra API armor on the sqlite3_bind_blob() interface. check-in: 80de1ad5 user: drh tags: trunk
2016-02-17
20:47
When VDBE opcodes fail, they cause an immediate exit from the loop, rather than depending on the rc==SQLITE_OK test at the top of the loop. This is faster and smaller. check-in: 24c7151c user: drh tags: trunk
18:44
Fix up all VDBE opcodes so that they cause an immediate exit on any kind of error, and thereby eliminate the need to test "rc" at the top of the loop. Resulting code is a little smaller and faster. Closed-Leaf check-in: a444633a user: drh tags: vdbe-performance
15:01
Bump the version number to 3.12.0. check-in: c17d7276 user: drh tags: trunk
14:48
Remove the "#ifdef SQLITE_TEST" condition from fts5_test_mi.c. Update fts5_main.c so that if SQLITE_FTS5_TEST_MI is defined when it is built the fts5_test_mi.c entry point is automatically called. This makes it easier to build versions of fts5 that include the matchinfo() demo by default. check-in: 87e6e225 user: dan tags: trunk
14:11
Improve test coverage of demo code in fts5_test_mi.c. check-in: 8a78050d user: dan tags: trunk
13:24
Enhance Lemon to generate more compact and efficient code for yy_reduce(). Update the main SQL grammar to take advantage of the new capabilities. check-in: 53fd040c user: drh tags: trunk
12:34
More agressive use of /*A-overwrites-X*/ in the parser. Fix an off-by-one error in parser stack overflow detection. Closed-Leaf check-in: 417e7777 user: drh tags: parser-performance
11:13
Documentation typo on sqlite3_wal_hook(). No changes to code. check-in: fc2043eb user: drh tags: trunk
04:33
Enhance Lemon so that if reduce code contains a comment of the form "/*A-overwrites-X*/" then a LHS label A is allowed to overwrite the RHS label X. check-in: 5cfe9545 user: drh tags: parser-performance
01:46
Further improvements to the Lemon-generated code for yy_reduce(). check-in: ef95a7d6 user: drh tags: parser-performance
01:18
In Lemon, add the ability for the left-most RHS label to be the same as the LHS label, causing the LHS values to be written directly into the stack. check-in: 4bb94c7c user: drh tags: parser-performance
2016-02-16
21:19
Experimental changes to Lemon for improved parser performance. check-in: a65d583c user: drh tags: parser-performance
13:04
Minor simplification to the tokenizer. Slightly smaller and faster. check-in: 9570b6b4 user: drh tags: trunk
01:01
Improve the Lemon parser template (lempar.c) so that it avoids unnecessary work when the grammer defines YYNOERRORRECOVERY (as SQLite does). Slightly smaller and faster code results. check-in: 9235b0cf user: drh tags: trunk
2016-02-15
23:46
Fix a harmless compiler warning in FTS5. check-in: e52c9075 user: drh tags: trunk
22:37
Readability improvements for winRandomness. check-in: 1640f814 user: mistachkin tags: trunk
22:28
Fix comment. No changes to code. check-in: 2e1f2eff user: mistachkin tags: trunk
22:01
Revise compiler checks for the rand_s() function. check-in: 287f508d user: mistachkin tags: trunk
21:31
On windows systems when rand_s() is available, use it to obtain additional seed material in winRandomness(). check-in: 139081be user: drh tags: trunk
20:41
Improved entropy gathering for the implementation of winRandomness(). check-in: fea3705e user: drh tags: trunk
19:38
Add working -q and --help options to testfixture. check-in: 404494e5 user: drh tags: trunk
18:58
In the tool/warning.sh script, disable Android-specific compiler warning tests when not running on Linux. check-in: 153f01a8 user: drh tags: trunk
18:47
Fix harmless compiler warnings previously seen in 64-bit MSVC builds. check-in: 70262463 user: drh tags: trunk
18:15
Add the SQLITE_NOMEM_BKPT macro to enhance the ability to debug OOM errors. Only effective with compiling with SQLITE_DEBUG. check-in: 9b345476 user: drh tags: trunk
18:02
Minor code simplifications. check-in: c3b38efd user: drh tags: trunk
17:56
Make the application-defined SQL function logic more compact and faster, especially faster for the case where an application defines thousands of new SQL functions. check-in: 7d49ed32 user: drh tags: trunk
17:29
Version 3.11.0 check-in: 3d862f20 user: drh tags: trunk, release, version-3.11.0
15:06
Make sure the codec is invoked when overwriting existing frames of the WAL file. Yikes! check-in: f694e60a user: drh tags: trunk
00:34
Improvements to the application-defined function mechanism so that it is more compact and runs faster, especially when the application defines thousands of new SQL functions. Closed-Leaf check-in: 3201fbcc user: drh tags: many-app-functions
2016-02-14
00:14
Update a comment. Closed-Leaf check-in: e9753d9a user: mistachkin tags: noMemBkpt
2016-02-13
23:43
Enhance ability to debug out-of-memory errors. check-in: 6a9c4a3e user: mistachkin tags: noMemBkpt
18:54
Provide Sqlite3_SafeInit() and Sqlite3_SafeUnload() entry points on the TCL interface, but have the always return TCL_ERROR, because the non-standard TCL builds on Macs require this. check-in: 37ec3015 user: drh tags: trunk
2016-02-12
18:48
Fix a potential buffer overread provoked by invalid utf-8 in fts5. check-in: a049fbbd user: dan tags: trunk
17:56
Fix a fairly obscure buffer overread in fts5. check-in: 13058020 user: dan tags: trunk
17:30
Fix a documentation typo. No changes to code. check-in: d9c98587 user: drh tags: trunk
17:27
Enhance mptester so that it takes great care to delete its test database prior to start-up, including checking the return code from unlink() and retrying after a delay if unlink() fails. Hopefully this will clear intermittant startup problems on Windows. check-in: 6ea84ec1 user: drh tags: trunk
05:19
Naming updates for Universal Windows Platform. check-in: 717c1fc4 user: mistachkin tags: trunk
00:13
Remove an unused parameter from whereSortingCost(). check-in: b5d77199 user: drh tags: trunk
2016-02-11
22:41
Automatically disable FTS3 and FTS4 when building with SQLITE_OMIT_VIRTUALTABLE. check-in: 0beb32d2 user: drh tags: trunk
21:59
Enhance the MSVC makefile to enable building 'testfixture' fully from source code. check-in: f183e059 user: mistachkin tags: trunk
21:55
Remove the unexplained extra 3.0 cost factor for the B-tree sorting that is done to implement DISTINCT in the absence of an index to help. check-in: 52571991 user: drh tags: trunk
21:53
Remove the unused fts5BlobCompare() routine. check-in: defc762d user: drh tags: trunk
21:38
Prevent 'expanded command line X too long' errors during the batch 'for' loops used for copying files. Closed-Leaf check-in: 67ee9b5a user: mistachkin tags: testFixtureSrc
21:28
Enhance the MSVC makefile to enable building 'testfixture' fully from source code. check-in: 54ff3a26 user: mistachkin tags: testFixtureSrc
18:18
Fix another unused variable warning in fts5 code. check-in: 61b4c120 user: dan tags: trunk
18:08
Avoid a buffer overread when reading a corrupt fts5 structure record. check-in: facbc424 user: dan tags: trunk
17:01
Handle parser stack overflow when parsing fts5 query expressions. Fix some compiler warnings in fts5 code. check-in: bc3f7900 user: dan tags: trunk
15:37
Add JSON1 and FTS5 to the set of extensions subject to close compiler warning analysis. Fix some warnings in each. More (harmless) warnings still exist in FTS5. check-in: cfe2eb88 user: drh tags: trunk
13:30
Minor simplifications deferred to the next release. Closed-Leaf check-in: a863729c user: drh tags: simplify
2016-02-10
21:45
In the MSVC makefile, include the working directory so that it can pickup build generated files (e.g. sqlite3.h, etc). check-in: e9e6000b user: mistachkin tags: trunk
19:10
Add testcase() macros to the CHECK constraint avoidance logic. Avoid creating an unused VDBE label during CHECK constraint code generation. check-in: 970881be user: drh tags: trunk
18:24
Fix to previous check-in: Make sure CHECK constraints involving the ROWID are not ignored when the ROWID changes. check-in: 7782cb1d user: drh tags: trunk
16:52
Omit unnecessary CHECK constraints in UPDATE statements, when none of the columns referenced in the CHECK constraint are modified. check-in: 02fbdbc7 user: drh tags: trunk
16:03
Omit NOT NULL checks on unchanging columns in an UPDATE. check-in: 6a3aaedf user: drh tags: trunk
13:36
When generating the snapshot-tarball, truncate the date/time in the name to 12 significant digits (YYYYMMDDhhmm) omitting the seconds and fractional seconds. check-in: 604f7775 user: drh tags: trunk
13:17
Updates to the autoconf tarball README.txt file. check-in: a3e911e3 user: drh tags: trunk
2016-02-09
22:54
Update the snapshot tarball name to use the date (ISO8601 format) instead of the SHA1 hash in its name. check-in: 070ec66f user: drh tags: trunk
22:39
Add the new "snapshot-tarball" target to the unix makefiles, for building a tarball similar to "amalgamation-tarball" but named by the SHA1 hash of the current check-out rather than by the version number. check-in: 4f360b2a user: drh tags: trunk
22:00
Update the MSVC autoconf makefile with the recent changes from the primary one. check-in: c7242aa3 user: mistachkin tags: trunk
20:37
Fix the makefiles in the autoconf-tarball so that they build the command-line shell with SQLITE_ENABLE_EXPLAIN_COMMENTS. check-in: 1135ad01 user: drh tags: trunk