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44 check-ins using file src/main.c version 900dd06e

2014-09-01
13:37
Attempt to make the xDelete method of the unix VFS more robust on VxWorks. (check-in: b0f6b91f user: drh tags: trunk)
13:29
Micro-optimizations in sqlite3BtreeNext() and sqlite3BtreePrevious(). (check-in: 839c7996 user: drh tags: trunk)
01:16
Fix harmless compiler warnings for MSVC. (check-in: 3ef32461 user: mistachkin tags: trunk)
01:15
Merge updates from trunk. (check-in: 51f33cf1 user: mistachkin tags: asciiMode)
2014-08-30
15:49
In the command-line shell, added options --lookaside, --pagecache, and --scratch used to configure auxiliary memories. (check-in: f61db04b user: drh tags: trunk)
2014-08-29
14:20
Not a fault after all, rather a testing mistake. Move this change back to trunk. Was: Avoid an unnecessary OP_Move operation for expression subqueries. (check-in: 2a74129a user: drh tags: trunk)
12:29
Contains a fault. Was: Avoid an unnecessary OP_Move operation for expression subqueries. (Closed-Leaf check-in: 462f42af user: drh tags: mistake)
11:24
Add the sqlite3VdbeChangeDest() routine that can be used to eliminate OP_Move opcodes. (Closed-Leaf check-in: 8c57bcc3 user: drh tags: experimental)
2014-08-28
19:38
Improved WHERETRACE messages for the estimated output row reductions from range scans. (check-in: fdd478bb user: drh tags: trunk)
17:30
Fix a problem causing an inaccurate stat4-based estimate for the number of rows visited by a range scan. (check-in: a9daf3ac user: drh tags: trunk)
17:20
Add a testcase() macro to help verfity the row estimation logic. (Closed-Leaf check-in: 6ba60952 user: drh tags: stat4-experimental)
16:01
Fix a problem causing an inaccurate stat4-based estimate for the number of rows visited by a range scan. (check-in: 052d89b5 user: dan tags: stat4-experimental)
13:42
Fix a formatting error ("%d" needed in place of "%g") on a WHERETRACE macro inside of the query planner. This fix applies to debugging logic only. (check-in: c931ca2b user: drh tags: trunk)
2014-08-27
23:18
Refactor the sqlite3PcacheFetch() routine into three separate routines, which are significantly faster overall and about 100 bytes smaller in size as well. (check-in: bdb6e497 user: drh tags: trunk)
17:53
Add a VDBE synopsis comment for clarification. (check-in: 029a6dc7 user: mistachkin tags: trunk)
17:48
Add a missing ticket number to a comment in index7.test. (check-in: d8b1c433 user: dan tags: trunk)
17:37
When determining whether or not a partial index is usable, do not assume that the cursor number assigned to each table in the query is the same as its index in the FROM clause. Fix for ticket [98d973b8f5]. (check-in: fcebca16 user: dan tags: trunk)
14:14
In the sqlite3_context object, keep a pointer to the result value rather than storing the result value in the sqlite3_context object and using memcpy() to move the value back into its register after the function returns. This runs faster and saves over 500 bytes of code space. (check-in: 6c1ee3e3 user: drh tags: trunk)
03:28
Factor out the exception paths from sqlite3ValueToText() into a separate function so that the main routine is much faster for the common case of no required type or encoding conversions. (check-in: 1624916c user: drh tags: trunk)
00:50
Performance enhancement in sqlite3VdbeMemNulTerminate(). (check-in: f94cacc3 user: drh tags: trunk)
2014-08-26
15:06
Change the page cache so that a new sqlite3_pcache object is allocated as soon as the page cache is opened, not delayed until the first fetch request. This give a noticable performance boost. The interface between pager and the page cache has changed slightly, which might break ZIPVFS. (check-in: f1f94a97 user: drh tags: trunk)
2014-08-25
22:37
Add an assert() and five testcase() macros to the OP_Cast opcode implementation to help verify that it is fully tested. (check-in: af364cce user: drh tags: trunk)
21:11
Minor changes to the CAST logic to make it more testable. (check-in: 1ad70ec5 user: drh tags: trunk)
20:21
Test cases added for using unary "+" and CAST operators on the RHS of range constraints and verifying that STAT3/4 can use those constraints. (check-in: 42505e5a user: drh tags: trunk)
20:11
Allow CAST expressions and unary "+" operators to be used in the DEFAULT argument of an ALTER TABLE ADD COLUMN and to be understand on the RHS of range constraints interpreted by STAT3/4. This involves a rewrite of the implementation of the CAST operator. (check-in: 91d8a8d0 user: drh tags: trunk)
18:29
In cases where stat4 data is available but cannot be used because the rhs of a range constraint is too complex a expression, fall back to using the default estimates for number of rows scanned. (check-in: e06dc6f0 user: dan tags: trunk)
11:33
Remove the pager_lookup() function since it is redundant with sqlite3PagerLookup(). (check-in: 54164ce4 user: drh tags: trunk)
11:20
Change the name of the VdbeMemRelease() macro to VdbeMemReleaseExtern() to more accurately reflect what it does. Performance enhancement to the sqlite3VdbeMemRelease() function. (check-in: 3ca5846d user: drh tags: trunk)
2014-08-24
02:53
The sqlite3VdbeChangeEncoding() routine goes about 3x faster if the sqlite3VdbeMemTranslate() subroutine is not inlined. (check-in: 0c7e1b87 user: drh tags: trunk)
01:32
Patch the sqlite3PagerWrite() method in the Pager to run a bit faster. (check-in: c63311e2 user: drh tags: trunk)
2014-08-23
23:15
Faster implementation of pcache1Fetch() (check-in: 0371cc3b user: drh tags: trunk)
20:25
Faster implementation of the sqlite3ApiExit() routine. (check-in: bd41d394 user: drh tags: trunk)
19:42
Another memory allocator performance optimization. (check-in: 6da6f46d user: drh tags: trunk)
19:08
Fix a variable-declaration after code problem in btree.c. Harmless in GCC and CLANG but unacceptable for MSVC. (check-in: 45abd5c0 user: drh tags: trunk)
19:04
Changes to sqlite3ScratchMalloc() that make the entire memory allocation interface a little faster and about 100 bytes smaller. (check-in: f83daa16 user: drh tags: trunk)
18:17
Make the implementation of the sqlite3_aggregate_context() interface faster for second an subsequent invocations. This helps all aggregate functions to perform better. (check-in: 802148f3 user: drh tags: trunk)
17:41
Improved performance in the type handling of arithmetic operators in the VDBE. (check-in: 0c0a6039 user: drh tags: trunk)
17:21
Performance optimization in the applyAffinity() logic inside the VDBE. (check-in: 25f2246b user: drh tags: trunk)
2014-08-22
23:33
Another performance tweak: Split the sqlite3BtreeCursorHasMoved() routine into two with the second routine named sqlite3BtreeCursorRestore(). The first now only reports whether or not the cursor has moved and the second tries to restore the cursor. This allows the sqlite3VdbeCursorMoveto() routine to be refactored to avoid stack pointer movements, for a noticable performance gain. (check-in: ce123b5c user: drh tags: trunk)
22:26
Factor the saveAllCursors() routine of btree.c into two separate routines, for a noticable performance improvement. (check-in: 3eb08439 user: drh tags: trunk)
21:58
Performance enhancements in the b-tree mutex logic. (check-in: 89145306 user: drh tags: trunk)
20:35
Combine the pcacheAddToDirtyList() and pcacheRemoveFromDirtyList() routines into a single pcacheManageDirtyList() routine. The resulting binary code is slightly faster and a few bytes smaller. (check-in: 6bcf1af6 user: drh tags: trunk)
18:48
Performance enhancement in sqlite3PutVarint(). (check-in: a929be55 user: drh tags: trunk)
18:00
Split the sqlite3Error() routine into sqlite3Error() and sqlite3ErrorWithMsg(), for a slight size reduction and performance increase. (check-in: cf561d1f user: drh tags: trunk)