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100 check-ins occurring around fe1979552f43e052.
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2021-02-03
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| 13:08 | Add support for the RETURNING clause following PostgreSQL syntax. Also change the behavior of SQLITE_DBCONFIG_ENABLE_TRIGGER so that TEMP triggers are always allowed, regardless of the setting. (check-in: 416c898b user: drh tags: trunk) | |
| 12:35 | Fix an assert() that might be off-by-one in the case of a prior errors in the parse. (check-in: 06b15b17 user: drh tags: trunk) | |
| 00:55 | Modify the SQLITE_DBCONFIG_ENABLE_TRIGGER setting so that it only disables main-schema triggers and allows TEMP trigger to continue operating. This is safe, since only the application (not an attacker) can add TEMP triggers. It will also all us to disengage SQLITE_DBCONFIG_ENABLE_TRIGGER on Fossil databases since Fossil has no main-schema triggers but does use TEMP triggers. (Closed-Leaf check-in: a10c5a25 user: drh tags: returning) | |
| 00:05 | Load enhancements from trunk into the returning branch. (check-in: b84c7f60 user: drh tags: returning) | |
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2021-02-02
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| 20:46 | Do not allow aggregates in a RETURNING clause. Fix a memory leak that occurs when window functions are used in a RETURNING clause. (check-in: 2e9bd94b user: drh tags: returning) | |
| 20:41 | Modify the sessions extension to use more efficient SQL when applying a changeset or patchset. (check-in: e4ccfac0 user: dan tags: trunk) | |
| 12:01 | Report an error if RETURNING is used for DELETE or UPDATE of a virtual table. (check-in: bd5dee84 user: drh tags: returning) | |
| 00:16 | Allow the RETURNING trigger to exist for virtual tables. (check-in: 2f244ab4 user: drh tags: returning) | |
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2021-02-01
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| 21:26 | Add a few test cases for RETURNING together with UPDATE/DELETE LIMIT. (check-in: 7611c77d user: drh tags: returning) | |
| 12:39 | Improved corrupt database detection in balance_nonroot(). (check-in: 5d54d9fd user: drh tags: trunk) | |
| 01:57 | Modify RETURNING so that it does not return changes implemented by cascading foreign keys or by triggers. (check-in: 6e62470a user: drh tags: returning) | |
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2021-01-31
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| 16:45 | Mark an unreachable branch as ALWAYS(). (check-in: cb8b797a user: drh tags: returning) | |
| 15:50 | New opcode OP_ChngCntRow used to output the result of PRAGMA change_count. Only this new opcode, and not OP_ResultRow, checks for foreign key errors. Faster performance, and now also works with RETURNING. (check-in: 154fc2b1 user: drh tags: returning) | |
| 12:41 | When setting the number of result columns in a RETURNING trigger, be sure to set that value in the top-level bytecode program, not in the immediate caller of the trigger. (check-in: 1f1ce7ce user: drh tags: returning) | |
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2021-01-30
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| 21:55 | Improved comments on the new code. (check-in: a38f0c1d user: drh tags: returning) | |
| 16:16 | Add an ALWAYS() to an unreachable branch. (check-in: 6bb6de42 user: drh tags: returning) | |
| 14:17 | Change the OP_ResultRow opcode so that it does not cancel pending statement transactions. (check-in: fea91e3a user: drh tags: returning) | |
| 12:07 | Fix a obsolete assert() in the bytecode engine. Improved OOM detection in sqlite3AddReturning(). (check-in: 138b10d5 user: drh tags: returning) | |
| 03:06 | Fix handling of an OOM condition in sqlite3AddReturning(). (check-in: 52204cd7 user: drh tags: returning) | |
| 02:43 | Fix a memory deallocation problem that comes up when doing a RETURNING query on a corrupt database. I think I fixed this before, but it got unfixed with stale editor content. (check-in: 02b1415e user: drh tags: returning) | |
| 02:34 | Another attempt to get trigger selection correct for RETURNING triggers. (check-in: 1b8ed522 user: drh tags: returning) | |
| 02:22 | When running the RETURNING trigger, if it is tagged as a DELETE trigger, do not use it as INSERT or UPDATE. (check-in: 3c7a6e04 user: drh tags: returning) | |
| 01:30 | Test cases added. RETURNING works with UPSERT as does PG. (check-in: f5698f96 user: drh tags: returning) | |
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2021-01-29
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| 22:33 | Better handling of errors in RETURNING due to corrupt database files. (check-in: 6aa2a058 user: drh tags: returning) | |
| 21:31 | RETURNING works even if "PRAGMA count_changes=ON" is set. (check-in: a9122d97 user: drh tags: returning) | |
| 21:18 | Allow "*" wildcards in the RETURNING clause. (check-in: b0e3ae30 user: drh tags: returning) | |
| 19:32 | Working prototype. (check-in: b7ef4dc2 user: drh tags: returning) | |
| 16:20 | Fix possible division-by-zero in the new log() SQL functions. Problemm discovered by OSSFuzz. (check-in: 1ffd321a user: drh tags: trunk) | |
| 14:22 | Incorporate the sqlite3TriggerList() optimization from trunk. And move the pReturning field to the uninitialized area in the Parse object, to save memset() time. (check-in: 29fbaf0e user: drh tags: returning) | |
| 13:47 | Performance optimization (and size reduction) in sqlite3TriggerList() for the common case where there are no TEMP triggers. (check-in: 0defaf73 user: drh tags: trunk) | |
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2021-01-27
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| 20:35 | Merge recent enhancements from trunk. (check-in: 5fbcb208 user: drh tags: returning) | |
| 19:15 | Fix an issue with IN operator optimization introduced by check-in [4a43430fd23f8835] and described by ticket [ee51301f316c09e9]. (check-in: 9dc7fc9f user: drh tags: trunk) | |
| 17:15 | Ensure a cursor used by the SeekScan operator does not point to a valid row on the first iteration of the loop. Possible fix for [ee51301f316c09e]. (Closed-Leaf check-in: 390cf60a user: dan tags: fix-2d6e8400) | |
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2021-01-25
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| 21:24 | Add an extra log message in the case of an SQLITE_CORRUPT_INDEX error. (check-in: 0571c241 user: drh tags: trunk) | |
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2021-01-22
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| 21:23 | Enhance the query planner to enable it to use an index for IS NOT NULL constraints, even if STAT4 is not enabled. (check-in: 7b2a7c73 user: drh tags: trunk) | |
| 20:28 | Merge fixes from trunk. Omit a conditional in sqlite3IsLikeFunction() that was made unreachable by this enhancement. (Closed-Leaf check-in: 0b42f9eb user: drh tags: isnotnull-opt) | |
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2021-01-21
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| 21:36 | Do not allow VACUUM to resize the page_size to 512 if the reserve_byte value is 31 or greater. forum post e807885dc5. (check-in: d5ea75a0 user: drh tags: trunk) | |
| 20:42 | Performance optimizations in exprAnalyze() (check-in: 6d60cf54 user: drh tags: isnotnull-opt) | |
| 17:54 | Always enable the IS NOT NULL optimization, even if STAT4 is not enabled. (check-in: fc98218c user: drh tags: isnotnull-opt) | |
| 16:02 | Fix a problem caused by using an SQL variable in an OVER clause within a trigger program. Edit: The problem appears to have existed ever since window functions landed on trunk (check-in [17198a1206e2fbc9]) on 2018-06-30, version 3.25.0. (check-in: 02264ab6 user: dan tags: trunk) | |
| 15:40 | Fix a problem caused by using an SQL variable in an OVER clause within a trigger program. (Closed-Leaf check-in: 4f676466 user: dan tags: fix-over-trigger) | |
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2021-01-20
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| 23:01 | Improvements to the auxiliary "main.mk" makefile so that it works better with multi-threaded builds. (check-in: d1873054 user: drh tags: trunk) | |
| 15:10 | Incorporate the 3.34.1 patches into the reuse-schema branch. (Leaf check-in: cc0e5828 user: drh tags: reuse-schema-3.34) | |
| 14:10 | Version 3.34.1 (Leaf check-in: 10e20c0b user: drh tags: release, patch, version-3.34.1, branch-3.34) | |
| 10:59 | Add tests for sqlite3session_memory_used() interface. (check-in: 5596611f user: dan tags: trunk) | |
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2021-01-19
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| 20:38 | Fix an issue with sha3_query() when the first argument contains blank SQL statements. (check-in: a1a7a5f2 user: drh tags: branch-3.34) | |
| 20:17 | Bump the version number to 3.34.1. (check-in: cea7d0f8 user: drh tags: branch-3.34) | |
| 20:09 | 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: 30a4c323 user: drh tags: branch-3.34) | |
| 20:04 | Prevent potential segfault in the sqlite-expert idxPopulateStat1 context cleanup code. (check-in: 69e31d52 user: drh tags: branch-3.34) | |
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2021-01-18
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| 19:28 | Fix harmless compiler warnings seen with MSVC. (check-in: dc7938d2 user: mistachkin tags: trunk) | |
| 19:27 | Update test helper procedure 'get_pwd' to handle the ComSpec environment variable being absent. (check-in: fe197955 user: mistachkin tags: trunk) | |
| 12:35 | Enhance the query planner so that it is able to code EXISTS operators in the WHERE clause as if they were IN operators, when appropriate. (check-in: c1862abb user: drh tags: trunk) | |
| 00:11 | More comments on the EXISTS-to-IN optimization logic. (Closed-Leaf check-in: 92cc2909 user: drh tags: exists-to-in) | |
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2021-01-17
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| 00:13 | Minor simplification of the EXISTS-to-IN logic. (check-in: cac90a9f user: drh tags: exists-to-in) | |
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2021-01-16
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| 20:22 | Improved handling of vector equalities in the EXISTS-to-IN translator. (check-in: ef49ee4a user: drh tags: exists-to-in) | |
| 18:55 | Give the EXISTS-to-IN optimization the ability to handle some cases that involve vector comparisons, instead of throwing a mysterious error in those cases. (check-in: 87e78a19 user: drh tags: exists-to-in) | |
| 18:22 | Add debugging output about the EXISTS-to-IN optimization when the ".wheretrace" flag has the 0x20 bit set. (check-in: 0dad5ce3 user: drh tags: exists-to-in) | |
| 12:15 | Fix a hyperlink in the Lemon documentation. (check-in: 2ffb2ffa user: drh tags: trunk) | |
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2021-01-15
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| 17:51 | Add OOM injection tests for new code on this branch. (check-in: 9a181dba user: dan tags: exists-to-in) | |
| 16:37 | Update header comments for routines added by this branch. (check-in: 950030d6 user: dan tags: exists-to-in) | |
| 15:32 | Ensure the EXISTS->IN transformation preserves the collation sequence of the comparison operation. (check-in: a373baae user: dan tags: exists-to-in) | |
| 15:21 | Fix a potential NULL pointer dereference following OOM. (check-in: 8ce3cb90 user: drh tags: exists-to-in) | |
| 15:17 | Add a new optimizer disabling bit to close off the exists-to-in optimization, for testing purposes. (check-in: a80c9a07 user: drh tags: exists-to-in) | |
| 14:25 | Small performance improvement in the EXISTS-to-IN translator for the common case where the EXISTS operator is not found in the WHERE clause. (check-in: dcb7772d user: drh tags: exists-to-in) | |
| 14:15 | Merge the latest trunk enhancements into the exists-to-in branch. (check-in: 13c4c908 user: drh tags: exists-to-in) | |
| 11:39 | Add simple tests (and a fix) for the change on this branch. (check-in: 897f3f40 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: 249a71cc 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: 9f90a882 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: ccd3bae1 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: 83ec01e3 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: fd0c9a12 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: 188772a1 user: drh tags: minmax-opt-exp) | |
| 12:59 | cli: Omit surplus whitespace at the end of lines in .explain output. (check-in: 11e4eb09 user: drh tags: trunk) | |
| 11:44 | In the .selecttrace output, show the ORDER BY clause added by the Min/Max optimization. (check-in: db0ecfe6 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: abf8da81 user: drh tags: returning) | |
| 16:26 | Merge the ParseCleanup enhancement to trunk. (check-in: 35824c1b 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: 38ef8ab9 user: drh tags: parse-cleanup) | |
| 14:23 | Rerun autoconf. (check-in: 8f3ab5da user: drh tags: trunk) | |
| 14:19 | Fix for the top-level configure script so that it works with tcl 8.7. (check-in: 4810f814 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: affa2b7b 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: 49dfce46 user: drh tags: trunk) | |
| 18:24 | More detailed compile-time testing before attempting to use atomic load intrinsics. See forum post fc0237a39b30ac0a. (check-in: 5204c2c4 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: 24baab9a 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: c71f6cad user: dan tags: trunk) | |
| 16:29 | Fix problems with some "crashsql" tests. (check-in: 0c8e2ede user: dan tags: trunk) | |
| 16:10 | Fix harmless typos in comments per forum post 7849e58dd5 (check-in: d1e22e2f 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: c2c2c7e9 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: 203c049c 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: d01e9f2d 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: 76de2bb0 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: 6f25f252 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: d02820f0 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: 5ac939e0 user: drh tags: trunk) | |
| 18:23 | Size reduction and performance increase in sqlite3Prepare(). (check-in: 41f45c8e 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: 2996e800 user: drh tags: trunk) | |
| 16:43 | Streamline processing of the authenticator callback for the common case when there is no callback. (check-in: d3196685 user: drh tags: trunk) | |
| 15:13 | Add the "startup" test program designed to measure startup performance, and in particular schema parsing time. (check-in: 7b3b31ef 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: e5d7209e 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: 45f46317 user: drh tags: trunk) | |
| 13:10 | New test cases for cursor renumbering in the UNION ALL query flattener. (check-in: 270babf2 user: drh tags: trunk) | |