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45 check-ins using file src/vdbeInt.h version f177bed1

2014-09-25
12:31
Simplification to the random rowid picking logic that begins running when the maximum possible rowid has already been used. check-in: 1330c72e user: drh tags: trunk
11:08
Still more performance enhancements to the LIKE and GLOB operators. check-in: 6c8924ca user: drh tags: trunk
03:51
More performance optimization for the LIKE and GLOB operators. check-in: 5ab1023d user: drh tags: trunk
02:44
Change that might allow SQLite to build and work using the EBCDIC character set. check-in: ef30e035 user: drh tags: trunk
00:56
Size reduction and performance improvement in the LIKE and GLOB operators. check-in: b2c89ef4 user: drh tags: trunk
2014-09-24
19:47
Have each open database allocate its pTmpSpace when the first write cursor is opened, rather than on each insert or delete, for a small space savings and performance boost. check-in: 99323552 user: drh tags: trunk
18:31
Small performance and size optimization for btreeUnlockIfUnused(). check-in: 13c746f8 user: drh tags: trunk
13:20
Do not allow parameters in a DEFAULT clause of a CREATE TABLE statement. Ticket [78c0c8c3c9f7c1]. check-in: 1ad2bc1e user: drh tags: trunk
04:38
Experiment using linear interpolation, instead of a strict binary search, when looking for integer-keyed rows on a single b-tree page. The experiment was not successful. The number of key comparisons is reduced by about 15%, but the added complexity of the search logic causes an overall reduction in performance. The patch is saved for historical reference only. Closed-Leaf check-in: c705cf85 user: drh tags: linear-interpolation
02:05
Have the clearCell() routine return the cell size to the caller, rather than have the caller make a separate call to cellSizePtr(). check-in: f21d2175 user: drh tags: trunk
01:23
Shorten all lines of source code in btree.c to at most 80 characters. No logical changes. check-in: 5dd41cdb user: drh tags: trunk
00:59
Add the MemPage.noPayload boolean and use it to help cellSizePtr() and btreeParseCellPtr() run faster. check-in: 8e337531 user: drh tags: trunk
2014-09-23
23:12
Remove an unused C-preprocessor macro. No functional changes to the code. check-in: f480582c user: drh tags: trunk
22:36
Avoid calling btreeParseCellPtr() from within fillInCell() since most of what btreeParseCellPtr() computes is ignored by fillInCell(). Instead, have fillInCell() compute the values it needs inline. Performance improvement. check-in: 4147f667 user: drh tags: trunk
21:25
Simplify the CellInfo structure for a size reduction and performance improvement. check-in: bf59df66 user: drh tags: trunk
18:30
Add the "multiplex_truncate" PRAGMA to the multiplexor extension, for querying and setting the truncate flag on a database connection. check-in: d2962a5f user: drh tags: trunk
01:40
Adjust skip-scan cost estimates slightly so that a full table scan is preferred over a skip-scan to a column with only two distinct values. check-in: ae9a42b2 user: drh tags: trunk
2014-09-22
20:38
Fix to payload size overflow detection in the cellSizePtr() change of the previous check-in. check-in: 76097440 user: drh tags: trunk
19:51
Size reduction and substantial performance increase for cellSizePtr(). check-in: bc8bbf32 user: drh tags: trunk
14:30
Tune the query planner to be more aggressive about using automatic indexes on views and subqueries for which there is not opportunity to declare a persistent schema index. check-in: 41de1643 user: drh tags: trunk
03:22
Disable shared memory operations using the unix-nolock VFS. check-in: 10a6e510 user: drh tags: trunk
2014-09-21
23:08
Merge in all recent changes from trunk. check-in: 3967ebe8 user: drh tags: apple-osx
22:31
Correctly handle an ORDER BY clause on an outer query when applying the compound-subquery flattening optimization. Ticket [d11a6e908f]. Also add the SQLITE_ENABLE_SELECTTRACE option for additional debugging and analysis information about select statement processing. check-in: d5880abd user: drh tags: trunk
20:31
Add test cases for ticket [d11a6e908f]. Closed-Leaf check-in: 9683e001 user: drh tags: select-trace
17:51
Add the "showauth" extension in ext/misc. check-in: 28d52c1c user: drh tags: select-trace
00:27
Improved ".selecttrace" output. check-in: c0b61f70 user: drh tags: select-trace
2014-09-20
20:38
Candidate fix for [d11a6e908f]. check-in: 89398880 user: dan tags: select-trace
20:24
Fix the SELECTTRACE_ENABLE macro so that it doesn't cause problems for testfixture. Add new SELECTTRACE() calls. check-in: f1ba68f1 user: drh tags: select-trace
18:18
Enable SELECT query planning tracing when compiled with SQLITE_ENABLE_SELECTTRACE and either SQLITE_DEBUG or SQLITE_TEST. check-in: cbe0cf9d user: drh tags: select-trace
00:35
Fix the usage of the _GNU_SOURCE and _BSD_SOURCE macros in the main internal header file, sqliteInt.h. Set HAVE_STRCHRNUL to 1 by default on Linux only. check-in: 59e2c9df user: drh tags: trunk
00:29
Only enable HAVE_STRCHRNUL by default on linux, as that is the only place it appears to work by default. Closed-Leaf check-in: 0fac2c04 user: drh tags: sqliteIntMacros
00:02
Revise macro usage in 'sqliteInt.h'. check-in: 35db3e2f user: mistachkin tags: sqliteIntMacros
2014-09-19
22:44
Simplify two conditionals and add testcase() macros to the affinity transform logic in the comparison operators. check-in: 544664ca user: drh tags: trunk
22:30
Recognize the invariant that a Mem object cannot be MEM_Dyn and have a non-zero szMalloc at the same time. Enforce this with assert()s and exploit it in the sqlite3VdbeMemClearAndResize() routine for a performance increase. check-in: 3b21cf2b user: drh tags: trunk
22:01
Tighten the conditions under which applyNumericAffinity() be called and add assert() statements to prove that it is never called otherwise. check-in: e996ca32 user: drh tags: trunk
20:13
Fix the affinity on inserts into the ANALYZE tables. Change the affinity characters to be upper case, to make the P5 parameter of comparison operators easier to read. check-in: 3f3ca76a user: drh tags: trunk
19:43
Do not attempt to extend the temp file if VFS version 3 is not supported and hence memory mapped I/O is unavailable. check-in: 3ab20ba1 user: drh tags: trunk
19:00
Make the "nolock" VFS on unix a version-3 VFS so that the sorter can use memory-mapped I/O. check-in: 3db78d61 user: drh tags: trunk
16:56
Remove a local variable from the OP_Column implementation, resulting in a modest size reduction and a performance increase. check-in: 6199760d user: drh tags: trunk
16:13
Small size reduction and performance increase for releaseMemArray(). check-in: 24cd32d6 user: drh tags: trunk
16:02
Updates to comments. No code changes. check-in: 9b42c3da user: drh tags: trunk
15:28
The OP_Column opcode runs faster and is smaller by manually in-lining the code that persists string values in the output register. check-in: 36b613cc user: drh tags: trunk
04:42
Add the sqlite3VdbeMemClearAndResize() function. Fix a sorting-index prefilter problem. check-in: 987a7a21 user: drh tags: trunk
02:01
Make sure that the sorting-index pre-filter recognizes that a rowid reference might be sortable. This fixes a performance regression. Closed-Leaf check-in: 72727b68 user: drh tags: Cplusplus-comment
00:43
Add the sqlite3VdbeMemClearAndResize() interface to be used in place of sqlite3VdbeMemGrow(). A C++ style comment was left in this check-in by mistake, and so it has been moved into a branch to avoid problems in any future bisects on windows. check-in: 5b9b8987 user: drh tags: Cplusplus-comment