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100 check-ins occurring around 1268dc77712d85de.

2016-12-31
18:37
In speedtest1.c, make the "--lookaside 0 0" option completely disable lookaside. (Closed-Leaf check-in: 52b99bcb user: drh tags: speedtest1)
14:33
Minor #include change to speedtest1.c so that it will compile under MSVC. (check-in: 8c28fde0 user: drh tags: speedtest1)
2016-12-30
17:40
Fix a crash that could occur following an OOM in the group_concat() function if the second argument is an SQLITE_BLOB value. (check-in: 14d855d2 user: dan tags: trunk)
15:16
Strengthen the defense against OOM in the instr() SQL function. (check-in: a0971e71 user: drh tags: trunk)
14:25
Add a test to ensure that the app-defined pcache xFetch() method is never passed a key of zero. (check-in: 0bdbe49c user: drh tags: trunk)
14:15
Avoid passing NULL pointers to memcmp() or memcpy(), even when the "number-of-bytes" argument is passed 0. (check-in: 56ff72ab user: dan tags: trunk)
13:55
Clarify the expectations for the behavior of the xFetch method on the sqlite3_pcache_methods object for the case when the key is zero. (Closed-Leaf check-in: b0810ac1 user: drh tags: pcache1-zero-page)
13:40
Improved detection of zero page numbers in the page cache. (check-in: 5550e815 user: drh tags: pcache1-zero-page)
12:10
Fix a harmless compiler warning in fuzzcheck.c (check-in: 2842bc60 user: drh tags: trunk)
12:06
Disable the pagerAcquireMapPage() routine if memory-mapped I/O is disabled. This fixes a harmless compiler warning on OpenBSD. (check-in: 3e25ba6e user: drh tags: trunk)
00:09
Encode a 64-bit integer literal in date.c as a constant expression so that it works on older compilers. Also fix a harmless compiler warning in vdbe.c. (check-in: f57952ba user: drh tags: trunk)
2016-12-29
19:48
Fix harmless compiler warnings in the command-line shell and in Lemon. (check-in: afcdc4a6 user: drh tags: trunk)
17:25
In kvtest.c, use stat() instead of fseek()/ftell() to determine the size of a BLOB to be read directly from disk. This makes the pile-of-files database more competative against SQLite. (check-in: a7dca29f user: drh tags: trunk)
16:58
Add the kvtest.c test program used to show that it is many times faster to read thumbnail and similar BLOBs out of an SQLite database than it is to read them as separate files from the filesystem. (check-in: 8074d59c user: drh tags: trunk)
16:49
Add more detail to the header command to further explain how to compile and use the kvtest.c utility. (Closed-Leaf check-in: 55d29839 user: drh tags: kvtest)
16:18
Fix kvtest.c so that it compiles using MSVC. (check-in: e2bbeae7 user: drh tags: kvtest)
15:26
In kvtest.c: do not show the --cache-size setting on fopen() runs. Show progress for the (potentially slow) "export" command. (check-in: b0f58d24 user: drh tags: kvtest)
14:44
Improvements to the kvtest.c utility. Added the --cache-size option. Additional reporting of version and settings at the end of "./kvtest run". (check-in: f6fcac6a user: drh tags: kvtest)
03:57
Add the kvtest.c test program for measuring key/value read performance under various scenarios. (check-in: 489e0787 user: drh tags: kvtest)
2016-12-27
15:59
Do not allow the nockpt.test module to run under the inmemory_journal permutation. (check-in: a6af06f1 user: drh tags: trunk)
13:33
Allow sqlite3_interrupt() to be invoked on a database connection that is in the process of being closed even if SQLITE_ENABLE_API_ARMOR is defined. (check-in: 7854bee2 user: drh tags: trunk)
12:45
Adjust a corruption test case to accommodate the sqlite3BtreeInsert() optimization of check-in [0b86fbca66]. (check-in: 4cb0945f user: drh tags: trunk)
12:35
Disable new test modules nockpt.test and interrupt2.test for incompatible permutations. Add a CORRUPT_DB term to an assert() in vdbe.c. (check-in: a54e619e user: drh tags: trunk)
12:08
Avoid a potential (harmless) signed integer overflow in memory usage accounting when calling sqlite3_realloc() to reduce the size of an allocation. (check-in: 2d71cbdf user: drh tags: trunk)
02:43
Minor changes to make some newer test cases work under more compile-time options. (check-in: 382eea36 user: drh tags: trunk)
2016-12-26
12:25
During fuzz testing with the fuzzcheck utility program, impose a record length limit of 100MB and a limit on the length of LIKE strings of 50 bytes. (check-in: edc9db41 user: drh tags: trunk)
12:14
Enable ossfuzz.c to build even if SQLITE_OMIT_PROGRESS_CALLBACK is defined. (check-in: a37c00dc user: drh tags: trunk)
01:41
Remove an incorrect ALWAYS() macro from balance_nonroot(), which could result in corrupt databases if it were optimized out. This ALWAYS was added only two weeks ago (check-in [f9f2e23bbd68a]) and has never appeared in an official release. (check-in: e447b23c user: drh tags: trunk)
00:18
Add the built-in affinity() SQL function. (check-in: 57e40e1c user: drh tags: affinity-sql-func)
00:15
Enhance the fuzztest utility with the --prng-seed option. Always reseed the PRNG prior to each test. (check-in: 8c5187f6 user: drh tags: trunk)
2016-12-24
21:32
Combine the implementations of the ".tables" and ".indexes" commands in the command-line shell. The ".indexes" command now puts the indexes in multiple columns, just like ".tables" and shows all indexes in all attached databases. (check-in: def29333 user: drh tags: trunk)
19:37
The schema name "main" is always an acceptable alias for the primary database even if the primary database is renamed using SQLITE_DBCONFIG_MAINDBNAME. (check-in: 2f481b85 user: drh tags: trunk)
18:18
Change the output format of the ".databases" command in the command-line shell so that it shows the schema name, a colon, and the corresponding filename. (check-in: 8558512e user: drh tags: trunk)
18:04
In the command-line shell, improve the formatting to the ".databases" command and on the ".tables" command, only show the schema prefix for databases past the first ("main") database. (check-in: c0d5626e user: drh tags: trunk)
2016-12-23
16:05
Fill in missing opcode documentation entries for OP_SorterNext and OP_SorterSort. (check-in: 2940661b user: drh tags: trunk)
13:54
Use the VList object to capture the mapping between SQL parameter names and variable numbers in a single memory allocation. (check-in: 99fddf2e user: drh tags: trunk)
13:52
Add check to prevent a VList from growing after pointers to labels have been taken. (Closed-Leaf check-in: aa23d7ea user: drh tags: VList)
13:30
Fix the VList object so that it actually works. (check-in: 9dcd8569 user: drh tags: VList)
03:59
Use the VList object to replace Parse.azVar for tracking the mapping between SQL parameter names and parameter numbers. There is a performance improvement, though there are still a few hiccups in the current code. (check-in: 68ecafa1 user: drh tags: VList)
2016-12-22
14:53
Fix harmless compiler warnings. (check-in: fa86db2f user: drh tags: trunk)
2016-12-21
21:26
Change the default lookaside configuration from 500 slots of 128 bytes each to 125 slots of 512 bytes each. This uses the same amount of memory (64,000 bytes) but seems to perform much better in test applications. (check-in: 52a12e47 user: drh tags: trunk)
19:45
Simplifications to the way UnpackedRecord objects are allocated. Smaller and faster code that also fixes a subtle (currently unreachable) bug. (check-in: f7ab01f2 user: drh tags: trunk)
2016-12-18
17:42
Change the OP_IfNotZero opcode so that it decrements register P1 by 1 rather than the value in P3, and so that it only decrements if originally positive. This avoids decrementing the smallest 64-bit signed integer. (check-in: 165c0446 user: drh tags: trunk)
2016-12-17
21:07
Refinements to the new dbfuzz test program. (check-in: 50325abe user: drh tags: trunk)
20:27
Enhance fuzzershell.c to read and execute SQL commands in the autoexec table of the database under test. Add the dbfuzz.c test program combining selected features of fuzzershell.c and fuzzcheck.c. (check-in: ef6e071a user: drh tags: trunk)
08:18
Fix a problem in the shell tools readfile() command causing blobs to be truncated at the first embedded 0x00 byte in release builds, or an assert() to fail in a debug build. (check-in: 8dedd6ad user: dan tags: trunk)
2016-12-16
21:29
Merge recent enhancements from trunk, and especially the pragma-as-vtab change. (check-in: 4b1e7804 user: drh tags: apple-osx)
21:15
Merge the pragma-as-vtab enhancement from trunk. (check-in: 89250777 user: drh tags: est_count_pragma)
21:02
Fix a potential memory leak following an OOM error in the pragma processing. (check-in: 396ab8f8 user: drh tags: est_count_pragma)
18:43
Add the ".lint fkey-indexes" command to the command-line shell. (check-in: 94689e3b user: drh tags: trunk)
18:41
Fix minor issues with the ".lint" command implemention in the shell and the shell help text related to ".lint". (Closed-Leaf check-in: 1268dc77 user: drh tags: fkey-missing-indexes)
18:14
Built-in PRAGMA statements without side-effects can be invoked as table-valued functions by prefixing their name with "pragma_". (check-in: d66ec5cf user: drh tags: trunk)
17:28
Change ".fkey_missing_indexes" to ".lint fkey-indexes". (check-in: ee621ade user: dan tags: fkey-missing-indexes)
16:49
Experimental merge of the est_count_pragma and the pragma-as-vtab branches. (Closed-Leaf check-in: 4b73ee33 user: drh tags: est-count-pragma-vtab)
16:44
Update .fkey_missing_indexes to use the built-in pragma vtabs. (check-in: 3ab05987 user: dan tags: fkey-missing-indexes)
16:13
Merge the pragma-as-vtab change into this branch. (check-in: 4ba45e72 user: dan tags: fkey-missing-indexes)
15:57
Merge recent trunk enhancements. (check-in: 74a0ca1f user: drh tags: est_count_pragma)
15:05
Fix a problem causing the planner to generate sub-optimal plans for some queries that use recursive WITH sub-queries with LIMIT clauses. (check-in: 053a149c user: dan tags: trunk)
04:20
Fix an error in the way the "schema" argument to some pragma virtual tables is handled. (Closed-Leaf check-in: 546821e2 user: drh tags: pragma-as-vtab)
02:31
Simplifications to facilitate full test coverage. (check-in: 01afc515 user: drh tags: pragma-as-vtab)
02:14
Minor bug fixes and enhancements to the pragma eponymous virtual tables. (check-in: 3f8f4615 user: drh tags: pragma-as-vtab)
01:09
Merge enhancements from trunk, and especially the ability to use temp.sqlite_master as an alias for sqlite_temp_master. (check-in: 994a4401 user: drh tags: pragma-as-vtab)
01:00
All temp.sqlite_master to be used as an alias for sqlite_temp_master. (check-in: 8d646905 user: drh tags: trunk)
2016-12-15
21:33
Fix the cost estimation in the BestIndex method of the eponymous pragma virtual table implementation. (check-in: 7126807a user: drh tags: pragma-as-vtab)
21:11
The pragma as eponymous virtual table mechanism now appears to work. (check-in: 2c274a1a user: drh tags: pragma-as-vtab)
20:59
Code to automatically create eponymous virtual tables for read-only pragmas. Compiles, but does not yet work. (check-in: 988a61e8 user: drh tags: pragma-as-vtab)
18:59
Do exponential rather than linear expansion of the SrcList.a array when appending new elements, to reduce the number of malloc() calls. (check-in: 4e374912 user: drh tags: trunk)
16:01
Do more pragma processing from tables rather than in-line code. (Closed-Leaf check-in: a88ca352 user: drh tags: table-driven-pragma)
06:01
Add the -groupbyparent option to the ".fkey_missing_indexes" command. (check-in: 976c51b4 user: dan tags: fkey-missing-indexes)
2016-12-14
19:28
Add the experimental ".fkey_missing_indexes" command to the shell tool. To identify indexes that should be created on child keys if FK processing is to be enabled. (check-in: 7df23aca user: dan tags: fkey-missing-indexes)
14:07
Refactor the Table.nRef field as Table.nTabRef for easier grepping. (check-in: 9cae4c2e user: drh tags: trunk)
13:54
Increase the size of the reference count on Table objects to 32 bits. (check-in: d08b72c3 user: drh tags: trunk)
11:39
Fix the configure makefile to align it with the manual makefile. Unsaved changes from the previous check-in. (check-in: 00a184b6 user: drh tags: trunk)
11:23
Adjust the unix makefiles so that "make test" runs fuzzcheck prior to even attempting to build the other test programs. (check-in: bb48f7a5 user: drh tags: trunk)
11:14
Three times faster sqlite3SrcListAppend() in the common case by avoiding the call to sqlite3SrcListEnlarge() for the first allocation. (check-in: 0ea2762f user: drh tags: trunk)
10:30
Fix the optimization that prevents writing freelist pages to the journal. (check-in: 6aa9b265 user: drh tags: trunk)
2016-12-13
23:22
In the command-line shell, in the output of the ".dump", ".schema", and ".fullschema" commands, convert CREATE TABLE statements that appear to come from shadow tables into CREATE TABLE IF NOT EXISTS statements. (check-in: c7021960 user: drh tags: trunk)
20:30
Fix harmless compiler warnings. (check-in: ed2c9f37 user: drh tags: trunk)
18:47
Convert sqlite3PagerGet() into a pointer-dispatched virtual method. This makes it about 25% faster. (check-in: 7f88bb44 user: drh tags: trunk)
18:34
In the pager, avoid checking for the illegal page number 0 except when creating a new page. (Closed-Leaf check-in: dee20ba9 user: drh tags: pager-get-method)
16:57
Fix a problem causing SQLite to return false "foreign key violation" errors when there is a partial (i.e. WHERE constrained) UNIQUE index on the parent key columns. This bug did not cause SQLite to allow illegal data to be inserted into the database, only to reject legal operations. (check-in: 850877d1 user: dan tags: trunk)
15:53
Further refinements to the virtual method implementation of sqlite3PagerGet(). (check-in: 67df4446 user: drh tags: pager-get-method)
14:32
Make the sqlite3PagerGet() interface into a virtual method, with different implementations based on the current state of the pager. This gives a small performance increase by avoiding unnecessary branches inside the various methods. (check-in: df5bb90d user: drh tags: pager-get-method)
2016-12-12
23:24
Add the --mmap option to the speedtest1 program and to the speed-check.sh script that is frequently used to run speedtest1. (check-in: 1a636d5e user: drh tags: trunk)
18:12
Remove unnecessary MemPage initialization resets in the autovacuum ptrmap processing. (check-in: 1b36fbb9 user: drh tags: trunk)
16:15
Merge all the latest performance enhancements from trunk. (check-in: a24f805b user: drh tags: apple-osx)
16:08
Faster operation for large in-memory databases. (check-in: 9675518b user: drh tags: trunk)
12:58
Merge recent enhancements from trunk. (check-in: dc006e08 user: drh tags: est_count_pragma)
11:05
Performance optimization in sqlite3PagerWrite(). (check-in: d4dff10a user: drh tags: trunk)
01:53
Updates to the tokenizer for EBCDIC. No changes for standard builds. (check-in: 4fc6580f user: drh tags: trunk)
01:30
Size and performance optimization in btreeInitPage() in the freeblock validation step. (check-in: 57deb1b4 user: drh tags: trunk)
00:58
Change the order of comparison for divider cell overflow in balance non-root to avoid a (harmless) reference to an uninitialized variable. (check-in: f9f2e23b user: drh tags: trunk)
2016-12-10
13:12
Avoid an unnecessary memset() in the sqlite3BtreeInsert() routine. (check-in: 35ecd4eb user: drh tags: trunk)
12:58
Reorder the fields in the VdbeCursor object so that those that need to be bulk zeroed on allocation are grouped at the beginning, and the memset() only runs over those fields that really need it. (check-in: 8165f88b user: drh tags: trunk)
04:06
Avoid signed integer overflow when dealing with a LIMIT and OFFSET whose sum exceeds the maximum integer value. (check-in: c9bdf7ad user: drh tags: trunk)
00:14
In balance_nonroot, try to combine dropCell/insertCell combinations for the dividers into a cell overwrites. This results in a very small (0.05%) performance gain which is probably not worth the added complexity. (Closed-Leaf check-in: 478627c9 user: drh tags: failed-dropCell-opt)
2016-12-09
19:42
When doing the sqlite3BtreeInsert() overwrite optimization, make sure the memcpy() does not extend off the end of the page. (check-in: 684ef458 user: drh tags: trunk)
18:09
Additional comments and an assert on the sqlite3BtreeInsert() overwrite optimization. (check-in: c1f0ae9d user: drh tags: trunk)
17:32
In sqlite3BtreeInsert() when replacing a re-existing row, try to overwrite the cell directly rather than deallocate and reallocate the cell. (check-in: 0b86fbca user: drh tags: trunk)
16:12
Fix an fts5 bug that could cause a crash following an OOM error or sqlite3_interrupt() interrupt. (check-in: 0ea3ece9 user: dan tags: trunk)