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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 ancestors of [50f33681]

2015-06-08
17:40
Split out some source code into new files: wherecode.c, whereexpr.c, and treeview.c. Other minor refactoring changes. check-in: 50f33681 user: drh tags: trunk
15:08
Factor out the TreeView parse tree printing module into a separate file. check-in: c32ce54c user: drh tags: view-optimization
14:23
Split more subfunctions of where.c out into a new whereexpr.c source file, for improved maintainability. check-in: 46ef95c1 user: drh tags: view-optimization
2015-06-06
20:12
Split out the bulk of the actual VDBE code generation logic from where.c into a new file, leaving behind the analysis logic. This makes the original where.c smaller and hopefully easier to edit. check-in: faa0e420 user: drh tags: view-optimization
18:30
Code simplifications in select.c and where.c. check-in: 4f20ac90 user: drh tags: view-optimization
00:18
Minor cleanup of the sqlite3Select() procedure. check-in: f4c90d06 user: drh tags: view-optimization
2015-06-05
22:33
Split FROM-clause subquery flattening and code generation into separate loops. check-in: be8e3fc7 user: drh tags: view-optimization
20:27
Provide one final Select tree dump prior to WHERE clause analysis when ".selecttrace 0x400" tracing bit is set with SELECTTRACE_ENABLED. Analysis and debug changes only - normal builds are unaffected. check-in: 283bf0b6 user: drh tags: trunk
2015-06-04
12:08
Change the name of SrcList.a[].zIndex to the more descriptive SrcList.a[0].zIndexedBy. check-in: 6a9cf063 user: drh tags: trunk
2015-06-02
19:36
Always check for cell overflow before returning a slot from the pageFindSlot routine in btree.c. check-in: 9f035c45 user: drh tags: trunk
18:09
For FROM-clause subqueries that cannot be flattened, try to push relevant WHERE clause terms of the outer query down into the subquery in order to help the subquery run faster and/or use less memory. check-in: 6df18e94 user: drh tags: trunk
17:25
Add test cases for type affinity rules. check-in: 9678646d user: drh tags: trunk
16:19
Rename SQLITE_AFF_NONE to SQLITE_AFF_BLOB to avoid confusion with "no affinity". check-in: 29ad9e91 user: drh tags: trunk
15:32
Rename SQLITE_AFF_NONE to SQLITE_AFF_BLOB. Closed-Leaf check-in: bce3f041 user: drh tags: blob-affinity-rename
14:02
Fix a faulty assert() in btree.c. Update the database fuzz test file with new test cases. check-in: 4e621af1 user: drh tags: trunk
2015-06-01
20:28
For FROM-clause subqueries that cannot be flattened, try to push WHERE clause terms of the outer query down into the subquery in order to help the subquery run faster and/or use less memory. Closed-Leaf check-in: 297fae75 user: drh tags: subquery-opt
18:13
Corrections to comments in expr.c. No code changes. check-in: f925389e user: drh tags: trunk
11:10
Typo fixes and additional background information in README.md. check-in: 9b8e5823 user: drh tags: trunk
2015-05-30
22:57
Updates to configure.ac to help it find where the TCL libraries hidden on Ubuntu 14.04. check-in: c864ff91 user: drh tags: trunk
22:05
Fix minor typo in comment. No changes to code. check-in: 73fc058b user: mistachkin tags: trunk
2015-05-29
18:42
Ensure that allocateBtreePage() always clears the MemPage pointer when it fails due to an I/O or memory allocation error. check-in: 09a38bf6 user: drh tags: trunk
17:51
Move two unreachable conditionals inside of NEVER() or assert(). check-in: db4e9728 user: drh tags: trunk
17:13
Remove a corruption test in balance_nonroot that is superceded by a prior better check. check-in: 00693682 user: drh tags: trunk
15:15
Omit the rowallock.test script (Read-Only WAL lock) from the inmemory_journal permutation. check-in: d21db330 user: drh tags: trunk
14:47
Add support for automatic indexes on FROM-clause subqueries that are implemented via co-routine. check-in: 020b8b10 user: drh tags: trunk
14:36
Add some extra source-code comments and a test case. Closed-Leaf check-in: 6d410442 user: drh tags: coroutine-autoindex
13:55
An attempt to allow automatic index creation on subqueries accessed via co-routine. check-in: 521345ad user: drh tags: coroutine-autoindex
01:35
Using "SELECT ALL" instead of just "SELECT" on a query that uses a single unflattenable subquery or view in its FROM clause will force the subquery to be manifested into a temporary table rather than run incrementally using a co-routine. This is a stop-gap means of controlling the decision to manifest while we try to work out a better to make that decision automatically. check-in: a29e117d user: drh tags: trunk
2015-05-28
15:14
Added comments and testcase() macros to error cases in the btree search. check-in: 7da7dc71 user: drh tags: trunk
11:23
Earlier detection of incompatible sibling pages in balance_nonroot. check-in: 60a09f17 user: drh tags: trunk
03:45
Add new test cases to the fuzzdata3.db set of database fuzz tests. check-in: 467b13a4 user: drh tags: trunk
03:28
Add the btreeGetUnusedPage() routine to btree.c, and use it to detect content pages on the freelist and to cause that condition to trigger an SQLITE_CORRUPT. check-in: fe15d1f7 user: drh tags: trunk
00:54
Do not attempt to take any write lock on a read-only database on Windows. check-in: a47ff0cd user: drh tags: trunk
2015-05-27
19:35
The fuzzoomtest makefile target is no longer supported, so update releasetest.tcl accordingly. check-in: 06959d4a user: drh tags: trunk
18:19
Fix a minor and harmless memory leak in fuzzcheck. Adjust the makefiles to run fuzzcheck with --quiet on valgrind tests. check-in: 8bfe8344 user: drh tags: trunk
18:13
All bytes of a page are initialized, even bytes that follow a 2-byte cell on a malformed page. check-in: 7373a004 user: drh tags: trunk
15:42
A different approach to preventing buffer overreads when comparing a vector of values with a corrupt index record that spans at least one overflow page. check-in: 95eaa49f user: drh tags: trunk
15:10
Disallow the use of "rowid" in CTEs - it has never worked correctly and it makes no sense, so we might as well make it an explicit error. Also: add the PRAGMA cell_size_check=ON command. check-in: 19e2cebc user: drh tags: trunk
14:21
A different approach to preventing buffer overreads when comparing a vector of values with a corrupt index record that spans at least one overflow page. Closed-Leaf check-in: 7e9e1b61 user: dan tags: avoid-buffer-overread
13:06
CTEs have never had working rowids. So disallow the use of the "rowid" column within CTEs. Closed-Leaf check-in: 0055df04 user: drh tags: no-rowid-in-cte
03:46
Add the "PRAGMA cell_size_check=ON" command. Closed-Leaf check-in: 2ead43f0 user: drh tags: cell-size-check-pragma
2015-05-26
20:31
Avoid a buffer overread when comparing against a corrupt record that spans at least one overflow page. check-in: 62a5b363 user: dan tags: trunk
20:07
Avoid branching on an uninitalized variable when comparing SQL values with the undefined serial types 10 and 11 (which only appear in corrupt databases). check-in: b4a45d3b user: dan tags: trunk
19:08
The "make fuzztest" target now uses fuzzcheck instead of fuzzershell. Test data is added for database fuzz testing. check-in: 5e3e410b user: drh tags: trunk
19:01
Merge accidental fork. Closed-Leaf check-in: e85628e3 user: dan tags: test-using-fuzzcheck
18:58
Fix a one-byte buffer overread that may follow a syntax error while preparing an SQL statement. check-in: 07500393 user: dan tags: test-using-fuzzcheck
18:58
Fix fuzzcheck so that it responds correctly to the TEST_FAILURE environment variable. check-in: 76770c9e user: drh tags: test-using-fuzzcheck
18:15
The "make fuzztest" target now uses fuzzcheck instead of fuzzershell. check-in: 4a5f6f1f user: drh tags: test-using-fuzzcheck
17:57
Enhance fuzzcheck with the ability to store descriptions in each source database and to run multiple source databases in a single invocation. check-in: 193364c8 user: drh tags: trunk
17:33
Add a cast to one side of the test added by [97806a78] in order to avoid a signed/unsigned comparison warning. check-in: 5b46d2a7 user: dan tags: trunk
17:29
Avoid using a zero-sized array within a struct in fts3 code. check-in: b05cae36 user: dan tags: trunk
16:12
Fix another bug in the in-memory VFS for fuzzcheck. check-in: 16878a31 user: drh tags: trunk
14:57
Update test cases in corruptI.test so that they work with both SQLITE_ENABLE_OVERSIZE_CELL_CHECK and SQLITE_DEFAULT_AUTOVACUUM builds. check-in: 22a14663 user: dan tags: trunk
12:18
Return SQLITE_CORRUPT to the user if an attempt is made to add database page 1 to the free page list. check-in: 68876003 user: dan tags: trunk
11:53
Fix a problem with ignoring UNIQUE constraints on WITHOUT ROWID tables rendered redundant by the PRIMARY KEY. check-in: 3b936913 user: dan tags: trunk
03:31
Silence harmless compiler warnings when building the command line utilities with MSVC. check-in: d26060c4 user: mistachkin tags: trunk
03:24
Add fuzzcheck to makefile clean targets. Also, for consistency, replace a few tabs with spaces. check-in: eda2a437 user: mistachkin tags: trunk
00:28
Add the --result-trace option to fuzzcheck, and other interface enhancements. check-in: c415bb7b user: drh tags: trunk
2015-05-25
23:14
Fix an important bug in the xRead method of the in-memory VFS for fuzzcheck. check-in: 58cd40e8 user: drh tags: trunk
22:38
Add the fuzzcheck test program. check-in: 341cb6ab user: drh tags: trunk
22:29
Add fuzzcheck to all makefiles and fix compiler warnings. Closed-Leaf check-in: 7b3d2190 user: drh tags: fuzzcheck
22:18
Merge in trunk fixes. check-in: c71c2e1a user: drh tags: fuzzcheck
22:17
Improved tracing capabilities in fuzzcheck. check-in: 864bfdbf user: drh tags: fuzzcheck
21:59
Add the --native-vfs option on fuzzcheck. check-in: 12e95e3f user: drh tags: fuzzcheck
20:04
Fix a case of a corrupt database causing SQLite to read from up to 4 bytes before the start of a memory allocation. check-in: 7d2c4f7b user: dan tags: trunk
19:37
Merge the btree fixes out of trunk. check-in: f3cd8cec user: drh tags: fuzzcheck
19:35
Add the --dbid and --sqlid parameters to fuzzcheck. Other fuzzcheck fixes. check-in: 75ec9299 user: drh tags: fuzzcheck
19:24
Have the b-tree layer return SQLITE_CORRUPT to any attempt to open a cursor with a root page number less than 1. check-in: aa18c8e9 user: dan tags: trunk
18:48
First code for a new utility program to rerun checks on a large number of fuzzer-generated test cases. check-in: c5b4e363 user: drh tags: fuzzcheck
18:47
Fix a couple of btree asserts that would fail when encountering 32-bit rollover in cell payload size fields (cell payloads this large always indicate corruption). check-in: 8fa0937a user: dan tags: trunk
17:07
Fix a case where database corruption may cause SQLite to write past the end of a buffer. check-in: 97806a78 user: dan tags: trunk
15:03
Fix an assert() in btree routine freeSpace() that may be false if the database is corrupt. check-in: 00a473c5 user: dan tags: trunk
10:57
Fix an fts4 matchinf() problem triggered by deferred tokens that are part of phrases that are part of AND expressions. check-in: f1e942a1 user: dan tags: trunk
10:29
Fix an obsolete comment - no changes to code. check-in: 4e4228c4 user: drh tags: trunk
09:33
Remove an incorrect and pointless assert(). check-in: 8c3929bd user: drh tags: trunk
2015-05-24
21:46
The assert() changes removed in the previous check-in are needed after all. check-in: 336fccc8 user: drh tags: trunk
21:09
Better detection of corruption in allocateSpace() in btree.c. check-in: bf7bb53e user: drh tags: trunk
10:18
Detect database corruption in the modifyPagePointer() routine and abort. check-in: 4f0bba42 user: drh tags: trunk
2015-05-23
19:53
Instead of early detection of corruption in balance_nonroot, simply ignore the error, as it is harmless and exceedingly uncommon. check-in: 7bbf9b3c user: drh tags: trunk
19:29
Earlier detection of a specific kind of corruption in the balance_nonroot() routine. check-in: ee6dc991 user: drh tags: trunk
02:44
Minor documentation improvements. No changes to code. check-in: e446d9ce user: drh tags: trunk
2015-05-22
23:50
Improved error messages in fuzzershell when unable to open the database. check-in: c404fcac user: drh tags: trunk
23:45
Fix a bug in fuzzershell caused by an uninitialized local variable. check-in: 745deab8 user: drh tags: trunk
23:39
Fix another bad assert() in btree - one that can be false on a corrupt database file. check-in: 89f0bbfd user: drh tags: trunk
23:17
Fix incorrect validation of the size of the BLOB returned by a geometry function on the RHS of a MATCH operator in RTree. The old code worked for 64-bit systems (by chance) but fails on 32-bit. check-in: 10cc44f5 user: drh tags: trunk
21:12
Add the sqlite3_value_dup() and sqlite3_value_free() interfaces. Use these interfaces to enhance R-Tree to add the sqlite3_rtree_query_info.apSqlParam field. check-in: c1814242 user: drh tags: trunk
21:04
Make sure sqlite3_value_dup() works correctly even for sqlite3_value objects that are marked SQLITE_STATIC. Closed-Leaf check-in: f332ffc3 user: drh tags: value-dup
19:55
Fix minor issues with the sqlite3_value_dup() interface. check-in: 95edcf50 user: drh tags: value-dup
18:40
Update with fixes and enhancements from trunk. check-in: 9605d008 user: drh tags: value-dup
17:29
The SRT_Table type for the SelectDest object is now just an SRT_EphemTab for which the ephemeral table has already been allocated. check-in: b9727e6b user: drh tags: trunk
16:08
Have r-tree prefer to use the constraint "col MATCH ?" over "rowid = ?". check-in: b9fb9519 user: dan tags: trunk
13:09
Fix two faulty assert statements discovered by fuzzing. check-in: 799817bf user: drh tags: trunk
12:37
Fix an assert in btree.c that can be false when using a corrupted database file. check-in: a6eb2a39 user: drh tags: trunk
11:38
Add the --database option to the fuzzershell test program. check-in: c6d5512f user: drh tags: trunk
2015-05-20
21:28
Add the sqlite3_value_dup() and sqlite3_value_free() interfaces. Use these interfaces to enhance R-Tree to add the sqlite3_rtree_query_info.apSqlParam field. check-in: a7ee40c4 user: drh tags: value-dup
17:36
Fix the initialization logic in CREATE TABLE AS so that the correct affinities are applied to all values being inserted into the new table, even if the RHS is a compound SELECT. Fix for ticket [f2ad7de056ab1dc9200]. check-in: 6a0cf3ce user: drh tags: trunk
17:25
Add a test case to verify that CREATE TABLE AS does not store INT values in TEXT columns. Ticket [f2ad7de056ab1dc92]. Closed-Leaf check-in: 0e45e8f1 user: drh tags: create-table-as-type-fix
17:18
Simplification of the initialization code for CREATE TABLE AS. check-in: 937f659e user: drh tags: create-table-as-type-fix
15:51
A proposed fix for the problem of CREATE TABLE AS generating a table that has INTEGER values in a TEXT column. Ticket [f2ad7de056ab1dc92]. check-in: d5e2c1fc user: drh tags: create-table-as-type-fix
00:15
Fix handling of queries with VALUES on the left and UNION ALL SELECT on the right and a LIMIT clause. check-in: c403502c user: drh tags: trunk
2015-05-19
23:56
Enhance the selecttrace display by showing Select.selFlags. check-in: 45d3893c user: drh tags: trunk