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100 check-ins occurring around df1d6482f9e92daf.
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2021-01-15
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| 14:15 | Merge the latest trunk enhancements into the exists-to-in branch. (check-in: 13c4c9088c user: drh tags: exists-to-in) | |
| 11:39 | Add simple tests (and a fix) for the change on this branch. (check-in: 897f3f4026 user: dan tags: exists-to-in) | |
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2021-01-14
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| 20:57 | Improvements to the min/max optimization. Fix for a performance regression introduced at [b8ba2f17f938c035] reported by forum post 4050026ab8 (check-in: 249a71cc68 user: drh tags: trunk) | |
| 20:50 | Allow the planner to convert an EXISTS(SELECT...) expression in a WHERE clause to the equivalent IN(...) expression in situations where this is possible and advantageous. (check-in: 9f90a88221 user: dan tags: exists-to-in) | |
| 00:53 | The early-out of the inner loop on the min/max optimization was overly aggressive for the cases where there is a join and outer loops contain IN operators. Fix this. Test case in TH3. (Closed-Leaf check-in: ccd3bae14b user: drh tags: minmax-opt-exp) | |
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2021-01-13
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| 21:05 | Fix a harmless compiler warning. (check-in: 83ec01e38c user: drh tags: minmax-opt-exp) | |
| 19:28 | Expand the number of optimization-disable bits from 16 to 32. Use one of the new bits to disable the min/max optimization, so that we can more easily verify that we get the same answer both with and within that optimization. (check-in: fd0c9a123b user: drh tags: minmax-opt-exp) | |
| 15:23 | Further enhancements to the min/max optimization of check-in b8ba2f17f938c035 to fix the performance regression identified by forum post 4050026ab8. (check-in: 188772a1db user: drh tags: minmax-opt-exp) | |
| 12:59 | cli: Omit surplus whitespace at the end of lines in .explain output. (check-in: 11e4eb0957 user: drh tags: trunk) | |
| 11:44 | In the .selecttrace output, show the ORDER BY clause added by the Min/Max optimization. (check-in: db0ecfe664 user: drh tags: trunk) | |
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2021-01-12
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| 20:16 | Lexer and grammar rules for a RETURNING clause on DELETE/INSERT/UPDATE. Actually making this work, though, will involve a lot more code which will likely slow down processing for the common case where there is no RETURNING clause. Furthermore, RETURNING seems to be of limited usefulness and it is not standard SQL. So we abandon it here. These experimental changes are parked in a branch as an historical reference. If circumstances changes, we might take up the cause again some day. (check-in: abf8da8156 user: drh tags: returning) | |
| 16:26 | Merge the ParseCleanup enhancement to trunk. (check-in: 35824c1bcb user: drh tags: trunk) | |
| 15:30 | Fix a potential use-after-free following an OOM in sqlite3ParserAddCleanup() and add a mechanism to detect situations where this might occur in the future. (Closed-Leaf check-in: 38ef8ab983 user: drh tags: parse-cleanup) | |
| 14:23 | Rerun autoconf. (check-in: 8f3ab5da4c user: drh tags: trunk) | |
| 14:19 | Fix for the top-level configure script so that it works with tcl 8.7. (check-in: 4810f814ff user: dan tags: trunk) | |
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2021-01-11
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| 20:37 | Add a linked list of ParseCleanup objects to the end of a Parse object and use that list as a place to put other sub-objects that need to be deallocated. Have a single such list for infrequently used sub-objects is more efficient than doing an a separate check for each kind of sub-object. Edit: Now possible to have use-after-free following an OOM. (check-in: affa2b7b31 user: drh tags: parse-cleanup) | |
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2021-01-09
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| 19:10 | New CLI command: ".stats vmstep" enables the display of the virtual-machine step count only, after each command. Useful for optimization problems. (check-in: 49dfce469e user: drh tags: trunk) | |
| 18:24 | More detailed compile-time testing before attempting to use atomic load intrinsics. See forum post fc0237a39b30ac0a. (check-in: 5204c2c4a7 user: drh tags: trunk) | |
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2021-01-08
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| 19:53 | Fix an issue with sha3_query() when the first argument contains blank SQL statements. (check-in: 24baab9a9f user: drh tags: trunk) | |
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2021-01-07
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| 16:59 | Update cksumvfs to check that the xCurrentTimeGetInt64 method of the underlying VFS is not NULL before invoking it. (check-in: c71f6cadcc user: dan tags: trunk) | |
| 16:29 | Fix problems with some "crashsql" tests. (check-in: 0c8e2ede5c user: dan tags: trunk) | |
| 16:10 | Fix harmless typos in comments per forum post 7849e58dd5 (check-in: d1e22e2f76 user: drh tags: trunk) | |
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2021-01-04
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| 18:28 | Add extra test for handling of embedded nul characters in the fts4 unicode61 tokenizer. (check-in: c2c2c7e945 user: dan tags: trunk) | |
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2021-01-02
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| 23:56 | In Lemon, factor the parser stack overflow detection logic out of the yy_reduce() subroutine and into the main parser routine, so that when overflow is detected, it can exit immediately. This saves a single conditional in the main loop of the parser. (check-in: 203c049c66 user: drh tags: trunk) | |
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2021-01-01
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| 22:06 | Avoid allocating space to hold the prepared statements for CREATE statements when parsing the schema of an existing database, since those prepared statements are never used.. This helps to make startup faster, (check-in: d01e9f2d00 user: drh tags: trunk) | |
| 21:02 | Faster and smaller test to ensure that the sqlite_schema.sql field is always a CREATE statement of some kind. (check-in: 76de2bb04b user: drh tags: trunk) | |
| 20:04 | Change the unions of the Table.addColOffset field from characters to bytes. This makes the query that implements ALTER TABLE ADD COLUMN more complex and slightly slower, but also makes CREATE TABLE statement parsing faster by avoiding a call to sqlite3UtfCharLen(). Since, CREATE TABLE parsing is far more common than ALTER TABLE, this is a net win for performance. (check-in: 6f25f2529f user: drh tags: trunk) | |
| 19:17 | Use the column name hash to improve performance of column name collision detection while parsing CREATE TABLE statements. (check-in: d02820f035 user: drh tags: trunk) | |
| 18:32 | Modify the makefile rule for "startup" so that it always builds with -Os and -DSQLITE_THREADSAFE=0 and no other options, for consistency of performance. (check-in: 5ac939e0ad user: drh tags: trunk) | |
| 18:23 | Size reduction and performance increase in sqlite3Prepare(). (check-in: 41f45c8e89 user: drh tags: trunk) | |
| 17:01 | Small size reduction and performance improvement in sqlite3VdbeMakeReady() by linking the new prepared statement into the prepared statement list sooner rather than later. (check-in: 2996e800a0 user: drh tags: trunk) | |
| 16:43 | Streamline processing of the authenticator callback for the common case when there is no callback. (check-in: d3196685d9 user: drh tags: trunk) | |
| 15:13 | Add the "startup" test program designed to measure startup performance, and in particular schema parsing time. (check-in: 7b3b31efb0 user: drh tags: trunk) | |
| 01:44 | Do not attempt to take a pointer to the ceil() and floor() functions as those routines are intrinsics on some versions of MSVC. (check-in: e5d7209e11 user: drh tags: trunk) | |
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2020-12-30
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| 13:20 | New test case for the HAVING fix of check-in [f62f983b56623f0e]. (check-in: 45f46317ab user: drh tags: trunk) | |
| 13:10 | New test cases for cursor renumbering in the UNION ALL query flattener. (check-in: 270babf259 user: drh tags: trunk) | |
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2020-12-29
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| 16:48 | Add an ALWAYS on an always-true conditional in the cursor renumbering logic of the UNION ALL flattener. Edit: turns out this change is incorrect and the conditional is reachable after all. See the nearby trunk check-in for test cases. (Closed-Leaf check-in: 5774318e73 user: drh tags: mistake) | |
| 15:06 | Do not set the P3 parameter on OP_RowCell when copying an index btree, as P3 is not used in that case. (check-in: eef070a4aa user: drh tags: trunk) | |
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2020-12-28
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| 21:42 | Fix missing comma in ctime.c that would cause the ENABLE_MATH_FUNCTIONS output rw to merge with whatever row followed. Problem reported in forum post aacac97680. (check-in: 328bc4a01d user: drh tags: trunk) | |
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2020-12-23
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| 16:46 | Add the sqlite3session_memory_used() API to the sessions module. For querying the amount of heap memory currently being used by a session object. (check-in: 823f75c2e4 user: dan tags: trunk) | |
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2020-12-22
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| 20:35 | Fix SQLITE_OMIT_WINDOWFUNC builds by moving declaration of sqlite3ExpandSubquery out of "ifndef SQLITE_OMIT_WINDOWFUNC" block. (check-in: 9587fa8b29 user: dan tags: trunk) | |
| 19:57 | Fix a couple spelling typos in comments. (check-in: 907ddf8676 user: mistachkin tags: trunk) | |
| 16:23 | Fix a problem handling sub-queries with both a correlated WHERE clause and a "HAVING 0" clause where the parent query is itself an aggregate. The problem was apparently introduced by check-in [6e6b3729e0549de0] (check-in: f62f983b56 user: dan tags: trunk) | |
| 14:54 | Simplification to the aggregate-function analysis error detection logic at the end of sqlite3Select(). (check-in: 82884438e3 user: drh tags: trunk) | |
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2020-12-21
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| 19:50 | Fix problems with joining UNION ALL sub-queries against other sub-queries that contain LEFT JOIN. (check-in: d554f710a5 user: dan tags: trunk) | |
| 18:39 | Fix a problem when flattening joins between a UNION ALL sub-query and another sub-query that uses more than one window function. (check-in: ef9733fe1c user: dan tags: trunk) | |
| 14:51 | Enhance documentation to show that "ro" is the correct way to say "readonly" in the mode= query parameter. (check-in: 788b96851d user: drh tags: trunk) | |
| 12:14 | Add the --timer option to fuzzcheck. Get the --timeout option working in fuzzcheck when running dbsql tests. (check-in: 3b0c9b41a8 user: drh tags: trunk) | |
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2020-12-20
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| 14:51 | Always declare the sqlite3WhereTrace variable, even for non-debug builds. (check-in: 88d93ee380 user: drh tags: trunk) | |
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2020-12-19
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| 15:39 | Fix a broken assert() in fts5 that could be triggered by corrupt database records. (check-in: b79f59f9ad user: dan tags: trunk) | |
| 13:58 | Allow UNION ALL sub-queries to be flattened even if the parent query is a join. (check-in: df1d6482f9 user: drh tags: trunk) | |
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2020-12-18
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| 18:04 | Fix for the previous fix in the case where a UNION ALL sub-query is joined against some other compound query. (Closed-Leaf check-in: 63c5cfb9ae user: dan tags: union-all-flattener) | |
| 16:13 | When flattening UNION ALL subqueries into a join query, ensure that separate cursor numbers are used for each segment of the newly flattened query. (check-in: c510377b0b user: dan tags: union-all-flattener) | |
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2020-12-17
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| 17:17 | Fix a part of the header comment for flattenSubquery(). (check-in: dc0937ce9d user: dan tags: union-all-flattener) | |
| 16:48 | Add test cases and minor fixes to this branch. (check-in: 5d6dc29d5f user: dan tags: union-all-flattener) | |
| 15:17 | In the CLI, add the ".filectrl data_version" command. And put the various ".filectrl" subcommands in alphabetical order. (check-in: 3434452148 user: drh tags: trunk) | |
| 11:30 | Merge latest trunk changes into this branch. (check-in: 9f41f60405 user: dan tags: reuse-schema) | |
| 11:24 | Fix a problem with sqlite3_expanded_sql() that could occur with statements that use both numbered (e.g. "?1") and unnumbered (i.e. "?") parameters. (check-in: 2a6cd6833e user: dan tags: trunk) | |
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2020-12-16
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| 21:09 | Enhance the sqlite3BtreeTransferRow() routine so that it does more careful checks for corrupt database pages. (check-in: 85952e7117 user: drh tags: trunk) | |
| 20:00 | Allow sub-queries that use UNION ALL to be flattened, even if the parent query is a join. Still some problems on this branch. (check-in: 00e4bf74d3 user: dan tags: union-all-flattener) | |
| 14:20 | Remove an unnecessary and incorrect #ifdef. Fix harmless compiler warnings. (check-in: 31cd1bbfa5 user: drh tags: trunk) | |
| 13:20 | Fix a typo in the sqlite3_free_filename() documentation. (check-in: 7316ee19c5 user: drh tags: branch-3.34) | |
| 13:17 | Fix a typo in the sqlite3_free_filename() documentation. (check-in: 48301edc90 user: drh tags: trunk) | |
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2020-12-15
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| 19:27 | Fix another integer overflow triggered by a corrupt database in recently modified vacuum code. (check-in: 4e2dd2a533 user: dan tags: trunk) | |
| 16:28 | When the -statstep option is passed to the "rbu" executable, print out memory stats right before exiting, as well as every -statstep steps. (check-in: 94f81b5117 user: dan tags: trunk) | |
| 13:55 | Change an fts5 assert() that can be triggered by a corrupt database to an if() condition. (check-in: ea0a7f103a user: dan tags: trunk) | |
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2020-12-14
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| 16:50 | Merge the latest trunk enhancements into the begin-concurrent-pnu branch. (check-in: daf0465021 user: drh tags: begin-concurrent-pnu) | |
| 16:26 | Merge recent trunk enhancements into the begin-concurrent branch. (check-in: a1708e8457 user: drh tags: begin-concurrent) | |
| 15:39 | Enhance UPSERT so that it allows multiple ON CONFLICT clauses and does not require a conflict target for DO UPDATE. (check-in: 6b01a24daa user: drh tags: trunk) | |
| 15:25 | Fix an integer overflow problem in new VACUUM code. (check-in: 59b4367fd8 user: dan tags: trunk) | |
| 13:52 | Minor changes for test coverage. (Closed-Leaf check-in: e5a8fa50f4 user: drh tags: generalized-upsert) | |
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2020-12-12
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| 00:43 | More test cases. No new problems discovered. (check-in: f34dd67e2d user: drh tags: generalized-upsert) | |
| 00:28 | New test cases with corresponding bug fixes. (check-in: f22c21a94c user: drh tags: generalized-upsert) | |
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2020-12-11
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| 19:36 | Begin adding test cases. Fix one bug found so far. More are pending. (check-in: aadd67ddf2 user: drh tags: generalized-upsert) | |
| 19:01 | Fix an assert() broken by recent changes to vacuum. (check-in: dd058da85c user: dan tags: trunk) | |
| 17:11 | Small performance tweaks. (check-in: 5321d60c57 user: drh tags: generalized-upsert) | |
| 16:49 | Bug fixes so that legacy tests pass. New tests for new functionality have not yet been added. (check-in: aa76790e58 user: drh tags: generalized-upsert) | |
| 16:03 | Add an "#ifndef SQLITE_AMALGAMATION" block around the typedef for u64 in shathree.c. (check-in: b411f29e1a user: dan tags: trunk) | |
| 14:34 | Fix the configure script on the autoconf distribution so that the --disable-threadsafe option works. See FreeBSD bug 244459. (check-in: e64ff2cce3 user: drh tags: trunk) | |
| 14:22 | Fix the expert extension so that it handles generated columns correctly. (check-in: c2ae7ba6f8 user: dan tags: trunk) | |
| 01:17 | Logic is in place to handle multiple ON CONFLICT clauses, but it does not work. Any use of ON CONFLICT will likely lead to memory faults. This is an incremental check-in to save my place. (check-in: 155142314f user: drh tags: generalized-upsert) | |
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2020-12-10
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| 20:31 | Use an iterator for the index loop in sqlite3GenerateConstraintChecks(). The idea is that this iterator can be enhanced to traverse the indexes in any order, as required by multi-index UPSERT. (check-in: 64a4a91ecc user: drh tags: generalized-upsert) | |
| 19:54 | Remove a redundant branch added by [56a54258560]. (check-in: b4d6f6d728 user: dan tags: trunk) | |
| 19:51 | Changes to avoid loading large records into memory within VACUUM. (check-in: 56a5425856 user: dan tags: trunk) | |
| 19:20 | Fix minor issues with new code on this branch. (Closed-Leaf check-in: f7fa76d096 user: dan tags: vacuum-lomem) | |
| 18:07 | Merge trunk changes into this branch. (check-in: 7337eed629 user: dan tags: vacuum-lomem) | |
| 18:06 | Better integrate the changes on this branch with OP_Insert and OP_IdxInsert. (check-in: 101cef1491 user: dan tags: vacuum-lomem) | |
| 13:49 | Add an optional function to the chsumvfs extension. When activated by the SQLITE_CKSUMVFS_INIT_FUNCNAME macro, this function will invoke the file-control that sets the number of reserved bytes to 8. This can be used to initialize a cksumvfs database file by programming languages that do not have access to the sqlite3_file_control() interface. (check-in: 01841fb4bf user: drh tags: trunk) | |
| 12:49 | The DO UPDATE code generator searches for the correct ON CONFLICT clause to use. (check-in: a47e35ee2d user: drh tags: generalized-upsert) | |
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2020-12-09
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| 23:35 | Fix compilation issues with MSVC related to C99. (check-in: c0de6c1fb2 user: mistachkin tags: trunk) | |
| 20:33 | Transfer large index or WITHOUT ROWID records between b-trees when vacuuming without loading them into memory. (check-in: dfd4ca6891 user: dan tags: vacuum-lomem) | |
| 20:30 | For upsert, the constraint check code generator uses a copy of the index list for the target table, which can potentially be reordered. (check-in: 3194c00c2c user: drh tags: generalized-upsert) | |
| 16:49 | Add tests for a 'delete' command on a contentless table where values that weren't actually inserted are NULL. (check-in: 818c647cec user: dan tags: trunk) | |
| 16:32 | Avoid loading large intkey rows when VACUUMing, even if the page-size is changing. (check-in: 0d2c377606 user: dan tags: vacuum-lomem) | |
| 13:11 | Improved comments in sqliteInt.h. No changes to code. (check-in: 8ccb8d1d55 user: drh tags: generalized-upsert) | |
| 01:34 | Initialize all terms in the ON CONFLICT clause stack. (check-in: 5e683fd1cb user: drh tags: generalized-upsert) | |
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2020-12-08
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| 20:19 | Experimental changes to vacuum to avoid loading large records entirely into memory. Currently only works in limited cases only - for rowid tables when the page-size does not change. (check-in: c90e063ca9 user: dan tags: vacuum-lomem) | |
| 14:29 | Enhance UPSERT parsing to allow multiple ON CONFLICT clauses. Only the very last clause may omit the conflict target, but the conflict target may now be omitted for the DO UPDATE resolution. (check-in: 2ca62f4c71 user: drh tags: generalized-upsert) | |
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2020-12-07
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| 23:14 | Fix a bad assert() in math1Func(). (check-in: 4b28612913 user: drh tags: trunk) | |
| 21:19 | Fix to the --disable-math option to ./configure. (check-in: 99ff641849 user: drh tags: trunk) | |