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

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100 descendants and 100 ancestors of [9ee5686a]

2014-10-31
20:11
Add the experimental sqlite3_stmt_scanstatus() API. check-in: 6a9bab34 user: dan tags: scanstatus
15:20
Merge all recent trunk enhancements into the apple-osx branch. check-in: fef8430f user: drh tags: apple-osx
14:53
Merge recent trunk enhancements, and in particular the improvements to the b-tree balancing logic, into the sessions branch. check-in: 28b044a5 user: drh tags: sessions
14:46
Change the command-line shell man-page to use the ".tr" troff directive instead of ".cc" for escaping the initial "." characters in the ".help" output. check-in: 67f0d469 user: drh tags: trunk
14:26
Simplify the logic in the cell redistribution loop of balance_nonroot(). Enhance and clarify comments and add assert() statements for additional verification of correctness. check-in: a07078b6 user: drh tags: trunk
12:22
Simplify the math slightly, and reduce by one the number of loop iterations, for the loop in balance_nonroot() that moves cells between pages. check-in: 2e838db8 user: drh tags: trunk
10:31
Add the "varint.c" utility program in the tool directory. check-in: ea5d56be user: drh tags: trunk
02:51
Remove an unnecessary branch from balance_nonroot(). check-in: 9fc7c88e user: drh tags: trunk
00:05
In the balance_nonroot() routine, protect the values in aPgno[] array from change during the page sort, so that aPgno[] can be used to avoid unnecessary pointer-map updates for auto_vacuum databases. check-in: 69c3924f user: drh tags: trunk
2014-10-30
23:14
Improvements to the wording of some comments. Reinstate an assert() that is only true for non-corrupt database files by adding an "|| CORRUPT_DB" term. check-in: 67adb448 user: drh tags: trunk
20:48
Tweaks to comments in btree.c. Minor code changes to enhance testability. check-in: c7d9aa3a user: drh tags: trunk
2014-10-29
18:20
Fix the %c format character in sqlite3VXPrintf() so that it correctly handles precisions larger than 70. check-in: 08a27440 user: drh tags: trunk
13:59
Version 3.8.7.1 check-in: 3b7b72c4 user: drh tags: release, version-3.8.7.1, branch-3.8.7
01:27
Increase the version number to 3.8.7.1 check-in: 83afe23e user: drh tags: branch-3.8.7
01:26
Fix problems with running UPDATE and DELETE against a VIEW and referencing the rowid in the WHERE clause. This is a cherrypick of [95f8ebdbf87326f2] and [8523670d50004f3]. check-in: cc33e846 user: drh tags: branch-3.8.7
01:18
Disable the use of strchrnul() unless specifically enabled by compile-time options. Cherrypick of check-in [e580470db77d6da9] check-in: 837368ad user: drh tags: branch-3.8.7
01:13
In the OP_Column opcode, when extracting a field that is past the end of a short record (because the row was originally inserted prior to ALTER TABLE ADD COLUMN) then make sure the output register is fully NULL and does not contain leftover flags (such as MEM_Ephem) from its previous use. Fix for ticket [43107840f1c02]. This is a cherrypick of check-in [24780f8ddc1683fc]. check-in: 304ea6ba user: drh tags: branch-3.8.7
01:07
Call fsync() right after ftruncate() when in journal_mode=TRUNCATE and when synchronous=FULL in order to ensure that transactions are durable across a power loss that happens moments after the commit. Proposed fix for https://bugzilla.mozilla.org/show_bug.cgi?id=1072773. This is a cherrypick of [3e922208b68563489]. check-in: a8f9bd1e user: drh tags: branch-3.8.7
00:58
In the OP_Column opcode, when extracting a field that is past the end of a short record (because the row was originally inserted prior to ALTER TABLE ADD COLUMN) then make sure the output register is fully NULL and does not contain leftover flags (such as MEM_Ephem) from its previous use. Fix for ticket [43107840f1c02]. check-in: 24780f8d user: drh tags: trunk
2014-10-28
20:49
Add new test file e_totalchanges.test, containing tests of the sqlite3_total_changes() interface. check-in: f84af4ad user: dan tags: trunk
20:35
Update the documentation on the sqlite3_randomness() interface to conform to enhancements associated with the SQLITE_ENABLE_API_ARMOR change. check-in: 96e9917c user: drh tags: trunk
18:24
Modify the documentation for sqlite3_changes() to make it more testable. Add tests and minor fixes for the same. check-in: 41cdd0c4 user: dan tags: trunk
16:50
Fix a crash that could occur if the WHERE clause of an UPDATE statement on a view that does not feature a column named "rowid" contains a term such as "rowid=?". check-in: 8523670d user: dan tags: trunk
16:19
Fix a faulty assert() in the DELETE code generator. check-in: 95f8ebdb user: drh tags: trunk
15:58
Trivial simplification to the automatic index logic. check-in: 23073a05 user: drh tags: trunk
12:35
Bump the version number to 3.8.8 check-in: 1a7e711e user: drh tags: trunk
00:56
Correct the documentation on the maximum size of a scratch allocation. check-in: 30f86eb3 user: drh tags: trunk
2014-10-27
22:06
Add special handling for static mutexes in sqlite3_mutex_alloc() when automatic calls to sqlite3_initialize() are enabled. check-in: 7857d27c user: mistachkin tags: trunk
20:14
Remove a small amount of unnecessary #ifdeffery from random.c. check-in: 2b9340c8 user: drh tags: trunk
19:58
Fix compilation issue with MSVC due to a misplaced variable declaration. check-in: 9588b345 user: mistachkin tags: trunk
19:42
Fix harmless compiler warning in an assert statement. check-in: d33a1ff3 user: mistachkin tags: trunk
19:39
Fix a typo in the macro name of an #ifdef check-in: 9646a136 user: drh tags: trunk
18:42
Merge latest enhancements, including the SQLITE_ENABLE_API_ARMOR patch, from trunk. check-in: 10aaf3b1 user: drh tags: apple-osx
18:34
Add the SQLITE_ENABLE_API_ARMOR compile-time option for extra API parameter validation. Enhance sqlite3_stricmp(), sqlite3_strnicmp(), and sqlite3_uri_parameter() for improved NULL parameter handling. check-in: ffb9d814 user: drh tags: trunk
18:21
Fix an unused variable in btree.c:allocateSpace(). check-in: 63724616 user: drh tags: trunk
14:26
Optimizations aimed at reducing the number of memcpy() operations required by balance_nonroot(). check-in: face33be user: dan tags: trunk
11:25
Add test file e_wal.test. check-in: fc6920b5 user: dan tags: trunk
08:02
If a free-slot is found within a page, but using that free-slot would fragment the page further and there are already at least 60 fragmented bytes, degragment the page. This matches the behaviour of the trunk. Closed-Leaf check-in: 1f80f8c1 user: dan tags: defrag-opt
07:01
Merge trunk with this branch. check-in: a13df301 user: dan tags: defrag-opt
2014-10-25
20:36
Further modifications to new code to better handle corrupt databases. check-in: 1a8cf0a0 user: dan tags: defrag-opt
13:42
Increase the resolution of the second parameter to the likelihood() SQL function (the probability value) so that it can handle probabilities as small as 0.00000001. Formerly, it ran out of precision at 0.001. check-in: 0f08924f user: drh tags: trunk
12:28
Do not use virtual (and hence redundant) WHERE-clause terms to restrict the content of a automatic partial index. Show when an automatic partial index is used in the EXPLAIN QUERY PLAN output. check-in: b9ad601e user: drh tags: trunk
2014-10-24
20:57
Ensure that the "Any prior cache entry associated with newKey is guaranteed not to be pinned" guarantee made to xRekey implementations is not violated. check-in: ecc3544e user: dan tags: defrag-opt
19:28
Enhance the automatic index logic so that it creates a partial index when doing so gives the same answer for less work. UPDATE: This change introduced a bug described by ticket [2326c258d02ead33]. check-in: d95d0313 user: drh tags: trunk
18:43
Fix some issues in the new code on this branch related to the handling of corrupt databases. check-in: 19736dd9 user: dan tags: defrag-opt
16:40
Fix some minor formatting and code organization issues. check-in: eab8706d user: dan tags: defrag-opt
15:26
Honor a high likelihood() on range constraints. check-in: 401235ed user: drh tags: trunk
14:32
Get the likelihood() functions working on operators like BETWEEN that create virtual terms in the WHERE-clause analysis. check-in: 03d0498d user: drh tags: trunk
12:37
Fix two problems. Tests now passing. Closed-Leaf check-in: 1c220b80 user: drh tags: api-armor
00:35
Add the SQLITE_ENABLE_API_ARMOR compile-time option. This is a work in progress and is not yet completely functional. check-in: c297a84b user: drh tags: api-armor
2014-10-23
17:26
Add debugging code to count the number of iterations of each loop made as part of statement execution. Leaf check-in: c6a5b67a user: dan tags: debug-loopcounters
01:01
Implement sqlite3_create_collation() by invoking sqlite3_create_collation_v2() with a NULL destructor argument. This saves a little space. check-in: 9762ad06 user: drh tags: trunk
2014-10-22
20:07
Disable the use of strchrnul() unless specifically enabled by compile-time options. check-in: e580470d user: drh tags: trunk
19:57
Change the 0x800 bit of SQLITE_TESTCTRL_OPTIMIZATIONS so that it disables the loading of STAT3 and STAT4 content, not just the using of that content. Change the internal name of that bit to SQLITE_Stat34. check-in: ca3b00c4 user: drh tags: trunk
18:42
Merge latest trunk with this branch. check-in: 854a54c6 user: dan tags: defrag-opt
16:25
The _beginthreadex() / _endthreadex() functions should only be used when compiling with MSVC. Closed-Leaf check-in: 1a5a5da3 user: mistachkin tags: msvcThreads
15:33
Add tests to check error handling in OTA. check-in: ec7321ae user: dan tags: ota-update
15:27
Take steps to avoid misestimating range query costs based on STAT4 data due to the roundoff error of converting from integers to LogEst and back to integers. check-in: 3c933bf9 user: drh tags: trunk
11:30
Sync the database file in sqlite3_ckpt_close(), even if the checkpoint has not finished. check-in: e2729d62 user: dan tags: ota-update
2014-10-21
21:56
Call fsync() right after ftruncate() when in journal_mode=TRUNCATE and when synchronous=FULL in order to ensure that transactions are durable across a power loss that happens moments after the commit. Proposed fix for https://bugzilla.mozilla.org/show_bug.cgi?id=1072773. check-in: 3e922208 user: drh tags: trunk
19:35
Test that sqlite3ota_open() works with URI paths. Fix some other issues. check-in: 6fd09854 user: dan tags: ota-update
18:16
Further tuning of the cost estimates for skip-scan loops, especially for cases when skip-scan loops are in competition with regular loops. check-in: a27861c2 user: drh tags: trunk
18:09
Add tests for another application writing the database while an ota update is ongoing. check-in: 2402baa0 user: dan tags: ota-update
16:01
Add WHERETRACE debugging output to the whereLoopAdjustCost() routine. check-in: ec1e942f user: drh tags: trunk
01:05
If a skip-scan is a proper subset of some other scan, then adjust the cost of the skip-scan upward so that it is more costly than the other scan. Such a cost imbalance can arise under STAT4 because of difficulties in getting an accurate estimate for skip-scans. check-in: f4b22a26 user: drh tags: trunk
2014-10-20
16:34
Merge version-3.8.7 changes with this branch. check-in: d380a648 user: dan tags: ota-update
2014-10-17
21:35
Fix a (probably harmless) bug in the CSV output mode of the command-line shell. check-in: 19fe4a0a user: drh tags: trunk
12:11
Merge the 3.8.7 changes into the apple-osx branch. check-in: aa7bbed1 user: drh tags: apple-osx
11:53
Merge all version 3.8.7 updates from trunk. check-in: f4de9e07 user: drh tags: sessions
11:24
Version 3.8.7 check-in: e4ab094f user: drh tags: trunk, release, version-3.8.7
2014-10-16
21:39
Work around MSVC not being able to deduce that a local variable was initialized in a called function. check-in: 06c576c1 user: mistachkin tags: trunk
18:34
Changes to work around Win32 and MSVCRT APIs that are not present on Windows CE 200x. check-in: 1418c006 user: mistachkin tags: trunk
11:45
Update the vdbe-compress.tcl script to account for expressions of the form (123>var), where "var" should be replaced with a reference to a union member. check-in: 640345d8 user: dan tags: trunk
2014-10-15
20:02
Fix a problem causing sqlite3changeset_concat() to fail to detect attempts to concatenate patchsets which changesets. check-in: 236704a9 user: dan tags: sessions
19:37
Merge latest trunk changes with this branch. check-in: 1b2824f1 user: dan tags: sessions
15:28
Update releasetest.tcl so that x86-64 runs a superset of the x86 tests. check-in: 3c1e70f4 user: dan tags: trunk
14:45
Fix a problem causing lock5.test to fail in mmap-mode. check-in: b3e7b446 user: dan tags: trunk
11:55
Add a four-byte prefix to the BtShared.pTmpSpace buffer to avoid reading before the beginning of an allocation. check-in: 9386bfca user: drh tags: trunk
11:31
Rearrange an expression in vdbemem.c to avoid a (harmless) reference to a possibly unitialized variable. check-in: 4a7b3fa0 user: dan tags: trunk
2014-10-14
20:25
Make sure new sqlite3_vtab objects created by the xCreate() virtual table method are initialized by the system, in accordance with the documentation. check-in: eab82330 user: drh tags: trunk
17:27
Fix some code duplication issues on this branch. Add minor optimizations to the new code. check-in: 58d7793b user: dan tags: defrag-opt
14:17
Merge from trunk recent micro-optimizations and the fix for the DESC index GROUP BY ORDER BY bug. check-in: 880df756 user: drh tags: apple-osx
13:41
Merge recent trunk micro-optimizations and the DESC index GROUP BY ORDER BY bug fix into the sessions branch. check-in: 83d4114f user: drh tags: sessions
2014-10-13
23:39
Optimize a database corruption test inside of the OP_Column opcode. check-in: 005e5b38 user: drh tags: trunk
20:12
Use the padding word in the Mem object as temporary storage for serial_type value in OP_Record, and thus avoid a redundant computation of the serial_type for each column. check-in: 4b3b65ee user: drh tags: trunk
18:09
Merge trunk changes into this branch. check-in: d5b7c5a8 user: dan tags: defrag-opt
17:42
Three small optimizations to vdbeaux.c. check-in: 04892f8b user: drh tags: trunk
16:02
Reduce the CPU load imposed by sqlit3VdbeCursorMoveto() by factoring out some of its functions and by avoiding unnecessary calls. check-in: c2799aec user: drh tags: trunk
13:00
Remove the OPFLAG_CLEARCACHE flag from OP_Column. In its place, change the P3 parameter of OP_SorterData to be the index of the pseudo-table cursor whose record header cache is to be cleared. This gives a small size reduction and performance increase. check-in: 20062f49 user: drh tags: trunk
12:30
Use OP_SorterColumns in aggregate queries. Remove OPFLAG_CLEARCACHE. Closed-Leaf check-in: 134e65c0 user: drh tags: OP_SorterColumns
01:23
Add the OP_SorterColumns opcode - an experiment in using a special case opcode to decode the Sorter output rather than the generic OP_Column. This might be faster. And with further work, it could eventually eliminate the need for OP_OpenPseudo. check-in: b9c695e8 user: drh tags: OP_SorterColumns
2014-10-12
22:37
Remove the VdbeCursor.lastRowid cache of the current rowid, since maintaining the correct cache value uses more CPU cycles than just recomputing the rowid on the occasions when it is actually needed. Replace it with the VdbeCursor.aOffset field which used to be computed from VdbeCursor.aType when needed. Saves 100 bytes of code space and runs 0.2% faster. check-in: 91384a7d user: drh tags: trunk
2014-10-11
23:31
Performance optimization and very slight size reduction for OP_Column. check-in: 869c30e4 user: drh tags: trunk
17:22
Simplification to the insertCell() routine in btree.c, resulting in a performance boost and a very small size decrease. It turns out that the extra work involved in sometimes avoiding an memcpy() of the first four bytes of a record takes more time than just unconditionally copying those four bytes. check-in: 66de1558 user: drh tags: trunk
10:52
Require the SQLITE_ENABLE_RTREE compile-time option in speedtest1.c in order to enable the R-Tree tests. check-in: 5d29a033 user: drh tags: trunk
02:12
Make sure that a GROUP BY that also implements an ORDER BY scans the table in the correct order. Fix for ticket [ba7cbfaedc7e6]. check-in: 7a32fdfd user: drh tags: trunk
01:22
Remove an unnecessary conditional from the EXPLAIN QUERY PLAN logic. check-in: c5dc83eb user: drh tags: trunk
2014-10-10
20:52
Account for the ASC/DESC properties of ORDER BY expressions when using the same index for GROUP BY and ORDER BY. Candidate fix for [ba7cbfaedc]. Closed-Leaf check-in: 2a957396 user: dan tags: experimental
19:15
Restrict the scope of the explainIndexRange() function in where.c. check-in: c3012452 user: drh tags: trunk
19:10
Fix a failing test case in index5.test. Also tweak the way cache memory is divided between read-only and dirty pages when using SQLITE_CONFIG_PAGECACHE to reduce IO in some cases. check-in: 8541dfb3 user: dan tags: trunk
18:09
Changes to enable compiling using VC6. check-in: 9ee5686a user: drh tags: trunk
17:47
When using the -config option to releasetest.tcl, default the testing type to "fulltest" if it is not specified on the command line. check-in: cf291cbe user: drh tags: trunk
17:44
Provide the new "-config CONFIG" option to the test/releasetest.tcl script, which allows one to run a single test configuration selected by name. check-in: d479e32b user: drh tags: trunk
17:20
Add the estimated number of output rows to the EXPLAIN QUERY PLAN output if compiled with SQLITE_EXPLAIN_ESTIMATED_ROWS. This feature is off by default for the time being. check-in: daa8314f user: drh tags: trunk
15:47
Simplify the code used to generate the text for EXPLAIN QUERY PLAN. check-in: beea1efc user: drh tags: trunk
15:01
Fix a potential problem in the whereRangeScanEst() routine when STAT4 is active. The problem was introduced by recent enhancements. check-in: 68e1b4de user: drh tags: trunk
13:08
Cause the command-line shell to return non-zero if the final SQL statement is incomplete. check-in: 177fff3b user: drh tags: trunk
2014-10-09
15:08
Allow FTS tokenizers to choose whether or not to consider the "*" character part of tokens or not. This restores the pre-[e21bf7a2ad] behaviour. Also fix a problem causing FTS to interpret tokens beginning with "*" characters as EOF. check-in: 49dfee7c user: dan tags: trunk
14:10
Add a test case for the memory leak fixed by the previous check-in. check-in: bae36d54 user: drh tags: trunk
14:00
Fix a memory leak associated with the FTS4 matchinfo() function. check-in: fb8da824 user: drh tags: trunk
2014-10-08
19:33
Remove an always-true branch in whereRangeScanEst(). Replace it with an assert(). check-in: 42e48fd3 user: drh tags: trunk
15:53
Fix up test cases to account for the new SQLITE_LIMIT_WORKER_THREADS limit. check-in: 6483d426 user: drh tags: trunk
14:28
Set the connection-specific lastRowid value before calling any SQL function. check-in: dff0f642 user: drh tags: trunk
13:34
Ensure that the Pager.pTmpSpace allocation is correct even if an OOM error occurs while reducing the page size. check-in: e4b43967 user: drh tags: trunk
11:11
Remove some temporary code in mallocA.test that was accidentally checked in. check-in: dedd15f7 user: dan tags: trunk
02:53
Fix the STAT4 range scan estimates for DESC indexes. check-in: e3fe8400 user: drh tags: trunk
00:08
More intuitive labels on ".wheretrace" output. check-in: adcb3fed user: drh tags: trunk
2014-10-07
23:02
Make sure the sqlite3VdbeMemClearAndResize() routine is never called with a zero size parameter, since a size of zero could lead to either a memory leak or an assertion fault. check-in: f672a380 user: drh tags: trunk
20:09
Fix the corruptI.test script so that it works with SQLITE_ENABLE_OVERSIZE_CELL_CHECK and with SQLITE_DEFAULT_AUTOVACUUM=1. check-in: e405b9e4 user: drh tags: trunk
16:59
Restrict the scope of the valueToText() routine. check-in: 13c962b3 user: drh tags: trunk
15:46
Enhance (and fix) the MEMTYPE tags associated with heap memory allocations when SQLITE_MEMDEBUG is used. check-in: ca5b789e user: drh tags: trunk
2014-10-06
18:33
Remove unreachable branches in decodeIntArray() when compiling without STAT3 or STAT4. check-in: 80e1baa5 user: drh tags: trunk
14:37
Improve the accuracy of the estimates used when searching an index for values not present in any stat4 samples. check-in: 3aff9a9c user: dan tags: trunk
12:41
Fix a harmless compiler warning inside an assert() in FTS4. check-in: 418f3c9a user: drh tags: trunk
2014-10-04
19:31
Tweaks to documentation on sqlite3_open() and sqlite3_bind(). No code changes. check-in: b8f7f19d user: drh tags: trunk
11:59
Updates to documentation and requirements marks. No code changes. check-in: 0f8102d7 user: drh tags: trunk
10:22
Add a test to show that the change on this branch is effective. Closed-Leaf check-in: fc619be0 user: dan tags: stat4-avgeq
00:07
Avoid leaking Index.aiRowEst memory if an OOM causes a rollback which deletes the index before the aiRowEst deletion code in sqlite3AnalysisLoad() routine has a chance to run. Since the aiRowEst now might be deleted from freeIndex() which does not always have a db pointer, make sure the aiRowEst memory is not held in lookaside. check-in: efd87ba1 user: drh tags: stat4-avgeq
2014-10-03
19:29
Fix a division-by-zero error that might occur if the sqlite_stat1 table is corrupt. check-in: f9c053b2 user: dan tags: stat4-avgeq
19:16
Improve the accuracy of the estimates used when searching an index for values not present in any stat4 samples under some circumstances. check-in: e6f7f97d user: dan tags: stat4-avgeq
16:00
Add requirements marks on the sqlite3_db_status() interface implementation. Fix a typo in the documentation. Fix the new sqlite3_result_text64() routine so that it works correctly with an encoding parameter of SQLITE_UTF16. check-in: d2fc3227 user: drh tags: trunk
14:54
Update to requirements marks related to changes in the memory allocation interface and enhancement of the documentation regarding DEFAULT clauses in CREATE TABLE. check-in: 440705b9 user: drh tags: trunk
2014-10-02
21:52
Avoid a NULL pointer deference when processing the IS operator if the right-hand side is an illegal "#ID" style variable. Fix for ticket [8c32a33a53092c85a15b] check-in: ffe75736 user: drh tags: trunk
2014-10-01
13:17
Show the TK_DOT operator in the TreeView debugging output. No changes to production code. check-in: 07c89940 user: drh tags: trunk
12:01
Avoid ever writing before the start of an allocated buffer in the DIRECT_OVERFLOW_READ code. Fix for [e3a290961a6]. check-in: c3c15d20 user: dan tags: trunk
2014-09-30
19:04
Improvements to the new syntax-tree output routines: Omit the "END SELECT" mark and instead terminate the graph at the last item. Increase the maximum tree depth to 100. check-in: 5ce05757 user: drh tags: trunk
17:31
Enable the query planner to deal with WHERE clauses that have OR terms nested within AND terms that are nested within OR terms. Also remove an unused function declaration. check-in: b6b28918 user: drh tags: trunk
17:03
Further enhancements to the "wheretrace" debugging output. check-in: 670993eb user: drh tags: trunk
14:14
Enhanced debug output for OR-logic in the query loop optimizer. check-in: 2e375eae user: drh tags: trunk
13:46
Show tree diagrams of data structures in the debugging output when the 0x100 bit is set on sqlite3WhereTrace or sqlite3SelectTrace. check-in: 92e0b4bd user: drh tags: trunk
12:33
Remove the SQLITE_ENABLE_TREE_EXPLAIN compile-time option. Add alternative debugging display routines: sqlite3TreeViewExpr(), sqlite3TreeViewExprList(), and sqlite3TreeViewSelect(). check-in: 4ff51325 user: drh tags: trunk
2014-09-29
15:42
Fix the header comment in sqlite3VdbeDeletePriorOpcode(). No changes to code. check-in: 7fb16268 user: drh tags: trunk
15:00
Ensure that the OP_Prev opcode verifies that content has not been deleted out from under the cursor. Fix for ticket [209d31e3161b9e9ff]. check-in: 414f0d6a user: drh tags: trunk
2014-09-26
18:30
Add an assert() to verify the last-row-id for the database just prior to calling a SQL function. check-in: d026f0c9 user: mistachkin tags: trunk
02:41
Fix the "PRAGMA integrity_check" command so that it avoids formatting error message context messages until it actually needs to generate an error message. This avoids much formatting, and hence greatly improves the performance of "PRAGMA integrity_check" in the common case when there are no errors. It also makes the code a little smaller. check-in: 83913515 user: drh tags: trunk
01:10
If an SQL function makes a recursive call to do an INSERT into the same database, make sure that the last_insert_rowid() for that INSERT is recorded. check-in: e93aecc0 user: drh tags: trunk
2014-09-25
17:42
Minor code reformatting and comment change, to improve clarity. No logic changes. check-in: baeb72a3 user: drh tags: trunk
13:17
Simplifications to the SQL function and aggregate calling procedures. check-in: 3467049a user: drh tags: trunk
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
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
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
2014-09-18
21:25
Add the Mem.szMalloc element to the Mem object and use it to keep track of the size of the Mem.zMalloc allocation. check-in: 9c09ac35 user: drh tags: trunk
18:55
Correct typos in comments. No changes to code. check-in: 55879932 user: mistachkin tags: trunk
17:52
Merge the Mem.r value into the MemValue union as Mem.u.r. Hence, a Mem can now store an integer or a real but not both at the same time. Strings are still stored in a separate element Mem.z, for now. check-in: 4c8c89d7 user: drh tags: trunk
16:28
Performance improvement for affinity transformations on comparison operators. check-in: d7afdcba user: drh tags: trunk
14:36
Since numeric affinity is the most common case, check it first. Interchange the NONE and TEXT affinity codes for easier checking of no affinity. check-in: 4ef4c9a7 user: drh tags: trunk
09:59
Modify an assert() within sqlite3PagerWalFramesize(), a function only ever used by zipvfs, to account for recent zipvfs changes. check-in: 3bd7c1b2 user: dan tags: trunk
02:20
Fix harmless warnings on 32-bit MSVC builds. check-in: 5192f964 user: drh tags: trunk
01:50
Make sure of the strchrnul() library function on platforms where it is available. check-in: ef1aa10b user: drh tags: trunk
01:29
Merge micro-optimizations into trunk after fixing the build on MSVC. Performance now shows 7.58% faster than the 3.8.6 release on x64 with gcc 4.8.1 and -Os. check-in: 1de558bc user: drh tags: trunk
01:21
Fix compiler warnings and change the nullMem structure initializer into a format that MSVC can understand. Closed-Leaf check-in: 163bfae8 user: drh tags: micro-optimizations