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30 ancestors of [41399169]

Allow sqlite3_snapshot_open() to be called to change the snapshot after a read transaction is already open on database. Leaf check-in: 41399169 user: dan tags: trunk
Fix UPSERT so that it checks the target-constraint first and fires the DO UPDATE if that constraint is violated regardless of whether or not other constraints are in violation. This aligns SQLite behavior with what PostgreSQL does. Fix for ticket [908f001483982c43cdb476dfb590a1a]. check-in: 529fb55e user: drh tags: trunk
Stop requiring the global VFS mutex to access the unixInodeInfo.pUnused field. The unixInodeInfo mutex is sufficient. check-in: e3ea43da user: drh tags: trunk
Take extra precautions to ensure access to unixInodeInfo.pUnused is protected by all necessary mutexes. check-in: 8b1e0010 user: drh tags: trunk
Fix an incorrect comment on the unix-nolock VFS object. No functional code changes. check-in: 90f7c193 user: drh tags: trunk
Fix the isLikeOrGlob() routine in the WHERE clause processing logic so that it avoids signed/unsigned character comparisons, as that can lead to an incorrect answer if the ESCAPE clause is an invalid UTF8 string. Problem found by OSSFuzz. check-in: 4195a3f8 user: drh tags: trunk
When a column must be a constant due to WHERE clause and the value of that column is being coded as a constant, make sure the affinity is correct. check-in: 7404ea83 user: drh tags: trunk
Minor style improvements. check-in: 60bbca2b user: mistachkin tags: trunk
Allow sqlite3_snapshot_open() to be called to change the snapshot after a read transaction is already open on database. Closed-Leaf check-in: 051ac015 user: dan tags: exp-snapshot-open
Enhance the edit() function so that it converts text from \r\n back into \n only if the original unedited copy contained no \r\n values. check-in: 20c995d3 user: drh tags: trunk
Add the --info option to the fuzzcheck test utility. check-in: 1caaaaa7 user: drh tags: trunk
Fix an overzealous assert() statement discovered by OSSFuzz. check-in: d9c9fe9f user: drh tags: trunk
Remove the column-cache from the code generator. The column-cache has been a persistent source of bugs for years and with recent improvements in the performance of OP_Column, it no longer provides a benefit. After the column cache is removed, the binary is almost 2KB smaller and the speed-check.sh performance test is over 3 million cycles faster. check-in: cdff3af7 user: drh tags: trunk
Remove a testcase() that is no longer reachable without the column cache. Provide an assert() to help prove that the testcase is no longer reachable. Closed-Leaf check-in: a500893b user: drh tags: omit-column-cache
Fix comments that were made obsolete by the removal of the column cache. check-in: 2041231d user: drh tags: omit-column-cache
Remove more column-cache residue: The OP_SetColTab and OP_VerifyColTab opcodes and the associated SQLITE_DEBUG_COLUMNCACHE logic. check-in: 80236e81 user: drh tags: omit-column-cache
Further logic simplifications that flow out of the omission of the column cache. check-in: 7d9072b0 user: drh tags: omit-column-cache
Add test cases for the constant expression fix of the previous check-in. check-in: 95db5bd9 user: drh tags: trunk
Ensure that all expressions that are to be evaluated once at the start of a prepared statement (the Parse.pConstExpr expressions) pass the sqlite3ExprIsConstantNotJoin() test. It is not sufficient to pass just the sqlite3ExprIsConstant() test as that would allow through column references that are bound to constants by the WHERE clause in the constant propagation optimization. This fixes a problem discovered by OSSFuzz. check-in: 8bc7f84c user: drh tags: trunk
Remove additional traces of the column cache. check-in: db6052e9 user: drh tags: omit-column-cache
Completely remove the column cache logic, which has been a persistent source of bugs for many years. Due to recent enhancements to the performance of the OP_Column opcode, removing the column cache actually makes speed-check.sh run faster. Removing the column cache also saves about 1,800 bytes of code space. check-in: 3f5f60cd user: drh tags: omit-column-cache
Fix the handling of sub-queries with LIMIT clauses by the optimization activated by compile-time symbol SQLITE_COUNTOFVIEW_OPTIMIZATION. check-in: 21235d9a user: dan tags: trunk
Fix the OP_SeekRowid opcode so that it has no type-change side-effects on the key register in P3. This fixes an obcure problem that arises when doing equi-joins between a table with a TEXT column against another table with an INTEGER PRIMARY KEY. The original problem was discovered when OSSFuzz created such a query and hit an assert() in OP_VerifyTabCol that was specifically designed to catch these kinds of errors at run-time. Test cases for this fix are in TH3. check-in: fa94b49e user: drh tags: trunk
Improve "PRAGMA vdbe_trace=ON" to always show the key values for the OP_IdxGT and related opcodes. check-in: 0f881955 user: drh tags: trunk
In the command-line shell, always exit if realloc() fails. check-in: e390023c user: drh tags: trunk
Add a small cost penalty to sorting to bias the query planner in favor of plans that do not require a final sorting pass. check-in: 85b9beb4 user: drh tags: trunk
Do not allow a column reference that is converted into a constant by the WHERE-clause constant propagation optimization to be moved to the init-time constant expression list, as the table reference will not work there. This fixes a problem found by OSSFuzz. check-in: d30b2a94 user: drh tags: trunk
Fix an assert() statement that was made obsolete by the constant propagation enhancement. Problem discovered by OSSFuzz. check-in: e4b4737e user: drh tags: trunk
Improved debugging output when the ".selecttrace" option is used in the shell. check-in: fcb88dd6 user: drh tags: trunk
Improvements to the parser to increase coverage. Fix the parser so that at least one expresssion is required after PARTITION BY and within the list of expressions on VALUES(). check-in: 02204f8b user: drh tags: trunk
When doing a DROP VIEW do not try to delete entries from the sqlite_stat1 table as there are none. check-in: 7efdba2b user: drh tags: trunk