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This Day In History For 2020-05-31

2 Years Ago (more context)

2018-05-31
19:14
More documentation typo fixes. No code changes. (check-in: 66c24513 user: drh tags: trunk)
19:00
Fix a harmless typo in a comment used to generate documentation. (check-in: 5a2a88cb user: drh tags: trunk)

3 Years Ago (more context)

2017-05-31
17:30
Add the SQLITE_STMTSTATUS_MEMUSED opcode to sqlite3_stmt_status() for finding the heap memory usage by a single prepared statement. (check-in: c26cf978 user: drh tags: trunk)
17:06
Generate extra log messages in response to irregularites in the pointer-map used by "BEGIN CONCURRENT" transactions. (check-in: f7e3e2bc user: dan tags: begin-concurrent)
16:21
Add the SQLITE_STMTSTATUS_MEMUSED option for sqlite3_stmt_status() that reports the amount of heap memory used for a single prepared statement. (Closed-Leaf check-in: b57d5104 user: drh tags: stmtstatus-memused)
16:09
Add the experimental "stmts" virtual table for introspection of prepared statements. (check-in: cb4c5c66 user: drh tags: trunk)
13:45
Avoid allocating excess memory to the KeyInfo objects. (check-in: df785943 user: drh tags: trunk)
13:27
Remove a completely unnecessary memset() from the INSERT code generator. (check-in: 7d58836b user: drh tags: trunk)
11:24
Very small performance increase in sqlite3VdbeSetNumCols(). (check-in: 8885b446 user: drh tags: trunk)
03:20
Reorder fields in the PgHdr object for a performance increase. (check-in: 326e63d7 user: drh tags: trunk)
02:58
Avoid unnecessary memory zeroing during expression list allocation. (check-in: de28e651 user: drh tags: trunk)
00:49
Size and performance optimizations to sqlite3ResolveExprNames(). (check-in: af8c0fed user: drh tags: trunk)

4 Years Ago (more context)

2016-05-31
21:18
An experimental branch with code that allows virtual tables to be declared as WITHOUT ROWID tables. This might be useful for virtual tables that model external data sources that do not have a convenient way of computing a unique rowid. The current check-in almost works, but there are still serious issues. (check-in: 49638f18 user: drh tags: without-rowid-vtab)
18:44
Add the columns=N parameter to the CSV extension. (check-in: 28ebeadd user: drh tags: trunk)
18:08
Add the testflags parameter to the csv extension. (check-in: b93fb2fe user: drh tags: trunk)
16:22
Add the "csv" virtual table for reading CSV files, as an extension in the ext/misc/ subfolder. (check-in: 00d3570c user: drh tags: trunk)

10 Years Ago (more context)

2010-05-31
20:28
Fix issues with locking_mode=EXCLUSIVE in WAL. (check-in: 8deba0ce user: drh tags: wal-incr-ckpt)
18:24
Add an "isInit" field in the wal-index header that must be non-zero for a valid header. Use this to detect an uninitialized wal-index. (check-in: a16fde19 user: drh tags: wal-incr-ckpt)
16:56
Fix an inconsistent #ifdef in wal.c. Fix os_unix.c so that it does not allow moving an SHM lock directly exclusive to shared without going through unlocked. (check-in: 552658da user: drh tags: wal-incr-ckpt)
16:41
Avoid dropping the checkpoint lock after a recovery run as a precursor to a checkpoint operation. (check-in: cc25cfa0 user: dan tags: wal-incr-ckpt)
16:17
Zero the checkpoint header as the last step of successful WAL recovery. Avoid an unnecessary lock/unlock in WalBeginReadTransaction. (check-in: db3509c5 user: dan tags: wal-incr-ckpt)
16:10
Get the new xShmLock interface design working on os_win.c. (check-in: 149a7082 user: drh tags: wal-incr-ckpt)
14:39
Make sure WAL alway requests enough shared-memory space. (check-in: 138f1283 user: drh tags: wal-incr-ckpt)
14:28
Remove the tests that enable tracing based on the existance of the "vdbe_*" files when in SQLITE_DEBUG mode. (check-in: cdbb4e7c user: drh tags: wal-incr-ckpt)
14:18
Update another test case in wal.test. (check-in: 99fde69e user: dan tags: wal-incr-ckpt)
13:11
Change WAL test cases to account for the improved concurrency in the new checkpoint logic. (check-in: 2d6f2485 user: drh tags: wal-incr-ckpt)
12:30
Do not fail a checkpoint just because active readers prevent backfill. (check-in: 9aa4243e user: drh tags: wal-incr-ckpt)
12:15
Add WALTRACE() macros to help with debugging and analysis. (check-in: 765c3318 user: drh tags: wal-incr-ckpt)
12:02
Another minor fix to checkpoint on the WAL branch. (check-in: 853f1e3f user: dan tags: wal-incr-ckpt)
11:39
Fix a bug in checkpoint introduced by [181ceb32ea]. (check-in: b499dbc8 user: dan tags: wal-incr-ckpt)
11:16
Fix some asserts and other things in the new WAL branch. (check-in: 181ceb32 user: dan tags: wal-incr-ckpt)
06:38
Changes to the way one of the WAL/OOM tests works. (check-in: 15abbc34 user: dan tags: trunk)
01:41
WAL runs but quickly deadlocks. (check-in: ace58acb user: drh tags: wal-incr-ckpt)

20 Years Ago (more context)

2000-05-31
23:33
:-) (CVS 30) (check-in: 9b8458bb user: drh tags: trunk)
22:58
:-) (CVS 29) (check-in: 09054df3 user: drh tags: trunk)
21:06
:-) (CVS 28) (check-in: 57c5add1 user: drh tags: trunk)
20:00
added DISTINCT on select (CVS 27) (check-in: 1f0c4ffd user: drh tags: trunk)
18:33
:-) (CVS 26) (check-in: 0b7d9eb8 user: drh tags: trunk)
18:20
:-) (CVS 25) (check-in: 35a8f523 user: drh tags: trunk)
17:59
:-) (CVS 24) (check-in: 4cd98eba user: drh tags: trunk)
15:43
:-) (CVS 23) (check-in: 0b040cea user: drh tags: trunk)
15:35
:-) (CVS 22) (check-in: d33ad08e user: drh tags: trunk)
15:34
added aggregate functions like count(*) (CVS 21) (check-in: dee7a8be user: drh tags: trunk)
02:27
:-) (CVS 20) (check-in: 01d85b35 user: drh tags: trunk)