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100 check-ins occurring around 4c5e6c200a.

2021-04-05
19:23
Adjust the README.md file so that build instructions work for Fossil version 2.12 and later. Forum post 51f28bb701. (check-in: 51f87adc user: drh tags: trunk)
19:05
Do not allow floating point rounding errors to cause a window function xInverse() function to be invoked before the corresponding xStep() call. (check-in: 7a19fed4 user: dan tags: trunk)
17:50
Fix an assert() that can be false when doing an incremental vacuum on a corrupt database file. dbsqlfuzz cced0668cfd4da4eb2382cb9dd26c17c64aaff76. (check-in: 15b80101 user: drh tags: trunk)
16:20
Avoid coding unindexed WHERE constraints if an equivalent transitive term has already been coded by an outer loop. (check-in: 644bb77f user: dan tags: trunk)
13:41
Do not invoke the xDelete method when converting to PRAGMA journal_mode=OFF if the underlying VFS does not support that method. dbsqlfuzz 39d6af88ef5242f866c4f9b21ede330c5c1e36a8. (check-in: d9145084 user: drh tags: trunk)
11:39
As a continuation of [1f66a85b7757754f], ensure that an OOM that occurs while checking the validity of the schema is reported out as SQLITE_NOMEM and not as SQLITE_SCHEMA. (check-in: 5045c8a7 user: drh tags: trunk)
2021-04-04
23:56
Fix an assert() in sqlite3BtreeLast() that needs an "|| CORRUPT_DB" term. Dbsqlfuzz case b92b72e4de80b5140c30ab71372ca719b8feb618. (check-in: ad718388 user: drh tags: trunk)
14:22
Avoid compile error when SQLITE_OMIT_VIRTUALTABLE defined. (check-in: 0ee0ef47 user: larrybr tags: trunk)
12:52
Make shell .parameter feature type-agnostic. Hush harmless compiler warning. (check-in: 35cf295e user: larrybr tags: trunk)
2021-04-03
23:30
Improved robustness to OOM conditions in the window function logic. dbsqlfuzz 0c123f7d80b29beaafc8411c12129e46f7ffdac3. (check-in: 35ff7cbf user: drh tags: trunk)
20:35
Take care not to change an SQLITE_NOMEM error into SQLITE_SCHEMA. (check-in: 1f66a85b user: drh tags: trunk)
19:23
Fix a crash in handling queries of the form "SELECT aggregate(DISTINCT tbl.col) FROM ... LEFT JOIN tbl ...". Fixes a problem introduced by [ef4ac0ddd297bbd3]. (check-in: 0dcf808d user: dan tags: trunk)
2021-04-02
20:53
Merge latest trunk changes with this branch. (check-in: a2216259 user: dan tags: begin-concurrent-report)
20:43
Correctly capture the error when a RETURNING clause appears on an attempt to UPDATE an eponymous virtual table. dbsqlfuzz 486f791cbe2dc45839310073e71367a1d8ad22dd. (check-in: 778a9a6e user: drh tags: trunk)
20:40
Merge latest trunk changes into this branch. (check-in: a7e612ee user: dan tags: begin-concurrent-pnu)
20:29
Merge latest trunk changes into this branch. (Leaf check-in: 98420842 user: dan tags: begin-concurrent)
19:55
Add experimental SQLITE_FCNTL_EXTERNAL_READER file control. (check-in: e16da5af user: dan tags: trunk)
18:59
Fix a problem with the geopoly_bbox() function. (check-in: f3a2eb97 user: drh tags: trunk)
15:20
Version 3.35.4 (Leaf check-in: 5d4c6577 user: dan tags: release, branch-3.35, version-3.35.4)
11:59
Fix incorrect RETURNING test cases in wherelimit.test (check-in: 64b0eb7e user: drh tags: branch-3.35)
2021-04-01
11:30
When resolving names in the RETURNING clause, do not accept trigger names even within subquires. (check-in: 8541c71b user: drh tags: branch-3.35)
2021-03-31
23:56
When resolving names in the RETURNING clause, do not accept trigger names even within subquires. See forum post 34c81d83c9177f46 for context. (check-in: fd4ea3f6 user: drh tags: trunk)
17:49
When resolving column names in the RETURNING clause, do not ignore an incorrect table name qualifier. Raise an error instead. (check-in: 3b916924 user: drh tags: branch-3.35)
17:42
When resolving column names in the RETURNING clause, do not ignore an incorrect table name qualifier. Raise an error instead. See forum post 85aef8bc01 for context. (check-in: 51d5c50b user: drh tags: trunk)
13:51
Defer deletion of expressions that are optimized out by the AND optimizer in the sqlite3ExprAnd() routine until the corresponding Parse object is deleted. This avoids a dangling pointer in AggInfo if sqlite3ExprAnd() is invoked by the push-down optimization. The dangling pointer appears to be harmless in release builds, only showing up in debug builds. Problem found by dbsqlfuzz. (check-in: 77a30f3f user: drh tags: branch-3.35)
13:41
Ensure that negative numbers may not be used in frame offset clauses even if they are initially text value. e.g. (RANGE BETWEEN '-1' PRECEDING ...). (check-in: 2d179f58 user: drh tags: branch-3.35)
13:31
Defer deletion of expressions that are optimized out by the AND optimizer in the sqlite3ExprAnd() routine until the corresponding Parse object is deleted. This avoids a dangling pointer in AggInfo if sqlite3ExprAnd() is invoked by the push-down optimization. The dangling pointer appears to be harmless in release builds, only showing up in debug builds. Problem found by dbsqlfuzz. (check-in: c36b4358 user: drh tags: trunk)
11:31
Ensure that negative numbers may not be used in frame offset clauses even if they are initially text value. e.g. (RANGE BETWEEN '-1' PRECEDING ...). (check-in: 8b681b27 user: dan tags: trunk)
2021-03-30
01:57
Raise an error if a term of the form "TABLE.*" appears in the RETURNING clause, as SQLite does not (yet) know how to handle that. Ticket [132994c8b1063bfb]. (check-in: 257e16f7 user: drh tags: branch-3.35)
01:52
Raise an error if a term of the form "TABLE.*" appears in the RETURNING clause, as SQLite does not (yet) know how to handle that. Ticket [132994c8b1063bfb]. (check-in: 3039bcaf user: drh tags: trunk)
2021-03-29
21:59
Increase the patch number to 3.35.4. (check-in: 4375cec2 user: drh tags: branch-3.35)
21:16
Do not do the EXISTS-to-IN transformation if the sub-select has LIMIT clause. Ticket [de7db14784a08053] (check-in: 3bf8a357 user: dan tags: branch-3.35)
20:28
Do not do the EXISTS-to-IN transformation if the sub-select has LIMIT clause. (check-in: d07e246f user: dan tags: trunk)
20:04
Add "#ifdef SQLITE_DEBUG" blocks around test variables sqlite3_fts5_may_be_corrupt and sqlite3_fts3_may_be_corrupt. (check-in: 00455954 user: dan tags: trunk)
20:01
Simplify the comparison opcodes in the bytecode engine, for a performance improvement. (check-in: f2af5868 user: drh tags: trunk)
19:47
Fix VDBE coverage macros. (Closed-Leaf check-in: ebe100de user: drh tags: compare-opcode-opt)
18:53
Omit the SQLITE_STOREP2 and SQLITE_KEEPNULL options from the comparison opcodes, allowing them to run faster. This required refactoring the vector comparison logic, which in turn required changing OP_ElseNotEq into OP_ElseEq. (check-in: 380b4605 user: drh tags: compare-opcode-opt)
14:40
Add the OP_ZeroOrNull opcode and use it to compute boolean values for scalar comparisons, rather than the SQLITE_STOREP2 parameter to the comparison opcode. (check-in: 93781b6f user: drh tags: compare-opcode-opt)
13:47
The comparison opcodes (ex: OP_Eq) now set the iCompare flag so that the result of comparison can be used by subsequent OP_Jump or OP_ElseNotEq opcodes. (check-in: bd00df8f user: drh tags: compare-opcode-opt)
2021-03-28
23:37
Alternative implementation of the comparison opcode speed-up of check-in [4a8805d9a66dc888] that should pass muster with UBSAN. (check-in: afb18f64 user: drh tags: trunk)
20:44
Document the "%token" directive for Lemon. This directive has been in place for a while, but was previously undocumented. (check-in: 36624d37 user: drh tags: trunk)
2021-03-27
20:45
Performance improvement in the comparison opcodes by rewriting an array lookup using pointer arithmetic. This makes gcc 5.4.0 builds with -Os both faster and smaller. Though I suspect that in newer compilers with better optimizers in will probably make no difference at all in the generated machine code. Later: Even though the new code is perfectly valid, and generates correct machine code that is both smaller and faster, UBSAN complains about it in OSSFuzz. So we will take it out. So here was have an example of OSSFuzz coercing a widely used application to become bigger and slower. (Leaf check-in: 4a8805d9 user: drh tags: gcc-opt)
16:21
For the sqlite3_bind_text16 TCL binding used for testing, ensure that there are at least 3 terminating zeros, so that there will always be a \u0000 character even if the original byte sequence is an odd number of bytes. (check-in: c23d092f user: drh tags: trunk)
2021-03-26
23:59
In the sqlite3_bind_text and sqlite3_bind_text16 TCL commands of the test suite, ensure that the string is zero-terminated if the size argument is negative. (check-in: f472fd64 user: drh tags: trunk)
14:04
Merge up all the 3.35.3 changes into the begin-concurrent-pnu-wal2 branch. (Leaf check-in: 4d425e64 user: drh tags: begin-concurrent-pnu-wal2)
13:58
Merge the 3.35.3 enhancements into the wal2 branch. (Leaf check-in: a1b8d9d2 user: drh tags: wal2)
13:47
Merge patch 3.35.3 into the begin-concurrent-report branch. (check-in: 4ba9fc34 user: drh tags: begin-concurrent-report)
13:38
Merge version 3.35.3 changes into the begin-concurrent-pnu branch. (check-in: 7e4c48af user: drh tags: begin-concurrent-pnu)
13:31
Merge from 3.35.3 into the begin-concurrent branch. (check-in: 988da36c user: drh tags: begin-concurrent)
13:16
Merge in changes for 3.35.3 (check-in: 76f19f4b user: drh tags: reuse-schema)
12:12
Version 3.35.3 (check-in: 4c5e6c20 user: drh tags: release, branch-3.35, version-3.35.3)
2021-03-24
23:30
Remove old testcases() macros. Also remove surplus end-of-line whitespace. (check-in: 54b41915 user: drh tags: trunk)
19:57
Add a comment to snapshotrevert.c warning of the undefined effects reverting to an old snapshot may have on newer readers. (Leaf check-in: 00af3bd2 user: dan tags: snapshot-revert)
19:54
Add experimental extension "snapshotrevert". (check-in: 2d5ee3ba user: dan tags: snapshot-revert)
19:44
Comment improvements to on the distinct-agg optimization. Show a line in the EQP output when using an ephemeral table to implement DISTINCT on an aggregate. (check-in: 037ca79e user: drh tags: trunk)
17:28
Improvements to distinct aggregates such that they can sometimes avoid using an ephermeral table to test for duplicates if the column that is distinct is part of an index. (check-in: ef4ac0dd user: drh tags: trunk)
17:04
Fix a harmless compiler warning. (check-in: 26b005a9 user: drh tags: trunk)
2021-03-23
22:15
Fix a problem with renaming a column when there is a quoted string immediately following the column name somewhere in the schema. (check-in: 4719fae6 user: dan tags: trunk)
21:02
Add an ALWAYS() on a branch that is always taken. (check-in: 0646d226 user: drh tags: trunk)
19:39
Test result adjustments in test/misc7.test due to the EQP format change. (check-in: d3ade8c7 user: drh tags: trunk)
16:34
When doing schema updates, try to convert (incorrect) double-quoted strings into (SQL-standard) single-quoted strings. (check-in: 07704704 user: drh tags: trunk)
15:39
Tweaks to test/scanstatus.test to account for the new EQP format. (check-in: 2eb28afd user: drh tags: trunk)
15:07
Changes to test/analyzeG.test to conform to the new EXPLAIN QUERY PLAN syntax. (check-in: d8afde1b user: drh tags: trunk)
14:33
Fix a test case in bigmmap.test so that it works with the new EXPLAIN QUERY PLAN output format. (check-in: 9ac064fe user: drh tags: trunk)
14:27
Add the ExprList.nAlloc column and use it to make the sqlite3ExprListAppend() routine much faster. (check-in: 1d3c4662 user: drh tags: trunk)
01:06
Enhance the EXPLAIN QUERY PLAN output to use symbolic names to describe subqueries, where possible, instead of cryptic subquery index numbers. And in other ways, make the EQP output cleaner and easier to read. Little code is changed, but many of the test results had to be tweaked to align with the new output format. (check-in: f8e28308 user: drh tags: trunk)
2021-03-22
18:53
Merge recent fixes from trunk. (Closed-Leaf check-in: 4a343698 user: drh tags: eqp-improvements)
16:50
Increase the version number to 3.36.0 to begin the next development cycle. (check-in: 5cee689d user: drh tags: trunk)
16:47
This branch for any further patches on 3.35. We anticipate 3.35.3 in a few days. Hopefully there will never be a need for 3.35.4. (check-in: 8de4cb98 user: drh tags: branch-3.35)
2021-03-21
18:23
Fix an assert() that in preupdate-hook logic (not normally built) that can be false when running VACUUM on a corrupt database file under PRAGMA writable_schema=ON. (check-in: 6bb21340 user: drh tags: trunk, same-as-3.35.3)
17:52
Add a better comment and an assert() on the code inside sqlite3CreateIndex() that REPLACE indexes come at the end of the index list. forum post ceb51d83f7 (check-in: 71e4da13 user: drh tags: trunk)
2021-03-20
23:15
Fix the "box" output mode in the shell when statement returns zero-column rows (for example from "PRAGMA incremental_vacuum"). (check-in: 34439fe3 user: drh tags: trunk)
15:46
Use the canonical name, not the AS name, when showing the MATERIALIZE or CO-ROUTINE lines for a CTE. (check-in: 1b83e232 user: drh tags: eqp-improvements)
15:11
Revise tests cases to align with the new EXPLAIN QUERY PLAN output. (check-in: 50fbd532 user: drh tags: eqp-improvements)
01:00
Fix a faulty assert() in the OP_SkipScan opcode. dbsqlfuzz a15a9b2ca82e812ad52f62c86cc93dca0dc72f01. Test cases in TH3. (check-in: 1805b9aa user: drh tags: trunk)
2021-03-19
19:44
Further simplification of the EQP output. Only show "SUBQUERY n" if the subquery is anonymous. (check-in: 1fadd305 user: drh tags: eqp-improvements)
19:09
Merge enhancements from trunk. (check-in: d192d737 user: drh tags: eqp-improvements)
17:54
In the wholenumber virtual table, increase the cost penalty for running open-loop. This appears to fix the problem reported by forum post b52a020ce4. (check-in: f12b5404 user: drh tags: trunk)
16:29
Dbsqlfuzz found a new way to make that branch in codeVectorCompare reachable. (check-in: 959272c2 user: drh tags: trunk)
15:02
Fix tokenizer's classification of EBCDIC newline. (check-in: 8680f6a8 user: larrybr tags: trunk)
14:51
Restore the NEVER() that was taken out by [f481636f1a0333c6] because that case is no longer reachable after the previous check-in. (check-in: e3a78b2a user: drh tags: trunk)
14:26
Fix a crash that could occur when an INSERT has more than one ON CONFLICT clause, at least one of which contains an unresolvable symbol. (check-in: 74208386 user: dan tags: trunk)
13:53
Correlated CTEs should not generate a materialization subroutine. If they need to be materialized, each use case must be materialized separately. dbsqlfuzz 01b8355086998f0a452cb31208e80b9d29ca739a. (check-in: d72d865d user: drh tags: trunk)
13:00
Improved labeling of EXPLAIN QUERY PLAN output. Many test failures due to the different output format. (check-in: 6f8faec0 user: drh tags: eqp-improvements)
2021-03-18
20:04
Add a NEVER() on a branch that was made unreachable by the "circular reference" fix. (check-in: 114d9780 user: drh tags: trunk)
18:27
Disable a test case requiring generate_series when virtual tables are not available. (check-in: ee86e2f4 user: drh tags: trunk)
18:25
Fix a problem causing spurious "<cte>: circular reference" errors to be reported when there is actually a different error in the SQL statement. (check-in: 99812236 user: dan tags: trunk)
16:52
Increase the patch level to 3.35.3. (check-in: 259b7c3e user: drh tags: trunk)
16:47
Fix the OP_OpenDup opcode so that it is able to duplicate a cursor that was itself opened by OP_OpenDup. Add additional verification of ephemeral tables. Fix for ticket [bb8a9fd4a9b7fce5]. (check-in: bcbe5308 user: drh tags: trunk)
16:36
Remove unnecessary code from sqlite3BtreeClose() and add test cases. (Closed-Leaf check-in: edbfdcae user: drh tags: opendup-fix)
15:42
Further sanity checking of the OpenDup cursors. (check-in: 0ec71cf1 user: drh tags: opendup-fix)
14:36
Fix the dbsqlfuzz-derived authorizer in fuzzcheck to avoid creating junk files when running rogue tests. (check-in: eca21a62 user: drh tags: trunk)
14:31
Automatically close ephemeral b-trees when their last cursor is closed. (check-in: 39b5af18 user: dan tags: opendup-fix)
13:55
Fix a problem with the filename normalizer in unix, discovered by dbsqlfuzz. (check-in: ff1eca7f user: drh tags: trunk)
13:42
Allow instruction OP_OpenDup to duplicate cursors created by OP_OpenDup, as well as by OP_OpenEphemeral. (check-in: b8de980b user: dan tags: opendup-fix)
13:19
New assert statements associated with Ephemeral cursors in the bytecode engine. (check-in: a8ce73e2 user: drh tags: trunk)
12:36
Change the name of the iDataVersion field of Btree to iBDataVersion to make it distinct from Pager.iDataVersion. (check-in: e4c44c0b user: drh tags: trunk)
2021-03-17
19:52
Update to version 3.35.2 (check-in: 18bec0d2 user: drh tags: reuse-schema)
19:07
Version 3.35.2 (check-in: ea80f300 user: drh tags: trunk, release, version-3.35.2)
19:05
Fix a harmless compiler warning in the appendvfs.c extension. (check-in: 0ed7eb91 user: drh tags: trunk)