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80 events for the month beginning 2021-02-01 by user drh
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2021-02-27
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| 15:12 | Remove a NEVER() that might sometimes be tree following an OOM. (check-in: ccb8cf52 user: drh tags: trunk) | |
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2021-02-22
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| 19:57 | Add a few simple test cases for MATERIALIZED and NOT MATERIALIZED. (check-in: 64878124 user: drh tags: trunk) | |
| 16:42 | Implement the MATERIALIZED and NOT MATERIALIZED hints on common table expressions. (check-in: b5a0778c user: drh tags: trunk) | |
| 14:25 | Add an ALWAYS() on a branch that is now unreachable. (Closed-Leaf check-in: ace54c5b user: drh tags: as-materialize-redux) | |
| 11:07 | Fix inverted logic regarding the materialization hint on the push-down optimization. (check-in: b66a4957 user: drh tags: as-materialize-redux) | |
| 03:04 | Add the AS MATERIALIZED and AS NOT MATERIALIZED syntax that works like it does in PostgreSQL. (check-in: a6bb272e user: drh tags: as-materialize-redux) | |
| 03:03 | • Edit [77e64647ec429c6e|77e64647]: Remove the "Closed" mark. (artifact: 6b3d57a5 user: drh) | |
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2021-02-21
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| 23:47 | • Edit [77e64647ec429c6e|77e64647]: Add propagating "closed". (artifact: 872cd926 user: drh) | |
| 23:47 | • Edit [e1eb62131913fcc4|e1eb6213]: Mark "Closed". (artifact: 2ca7210d user: drh) | |
| 23:46 | • Edit [78dcddd9697d9562|78dcddd9]: Mark "Closed". (artifact: b4299c87 user: drh) | |
| 23:45 | • Edit [7a90571e0a0e4301|7a90571e]: Mark "Closed". Edit check-in comment. (artifact: 755845a0 user: drh) | |
| 23:44 | Materialize any CTE that is used more than once. (check-in: ba59159f user: drh tags: as-materialize-redux) | |
| 21:04 | Rename the "struct SrcList_item" object to the more succinct "SrcItem". This is a symbolic change only. The logic is unmodified. (check-in: bfd5bf2c user: drh tags: trunk) | |
| 01:19 | Simplified resolution of CTE names. Slightly faster and about 100 bytes of code smaller. (check-in: 0d2c992f user: drh tags: trunk) | |
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2021-02-20
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| 21:20 | Performance improvement in resolving the INDEXED BY index name for the common case where there is no INDEXED BY clause. (check-in: 554b286a user: drh tags: trunk) | |
| 14:57 | Break out the Cte object from the With object. This will make it simpler to add new kinds of Cte objects (ex: DML statements) and/or MATERIALIZED keywords in the future. It brings trunk into closer alignment with the experimental as-materialize branch. (check-in: f03efe90 user: drh tags: trunk) | |
| 13:36 | Simplification to where.c manually cherrypicked from the as-materialize branch. (check-in: 03805a61 user: drh tags: trunk) | |
| 12:47 | Merge changes from trunk. (Later:) Abandon this line of development. See the as-materialize-redux branch. (Closed-Leaf check-in: 7a90571e user: drh tags: as-materialize) | |
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2021-02-19
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| 09:46 | Omit an branch made unreachable by the improved error message from dropping the last column of a table. (check-in: c5719fc5 user: drh tags: alter-table-drop-column) | |
| 09:36 | The COLUMN keyword in ALTER TABLE DROP COLUMN is optional. (check-in: a22f87fb user: drh tags: alter-table-drop-column) | |
| 09:09 | Give a better error message on DROP COLUMN when attempting to drop the last column of a table. (check-in: 5e1f362b user: drh tags: alter-table-drop-column) | |
| 02:30 | Add a NEVER() to an unreachable branch in the DROP COLUMN logic. (check-in: 963f498a user: drh tags: alter-table-drop-column) | |
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2021-02-18
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| 23:53 | Add missing VdbeCoverage() macros. (check-in: 9bb720e6 user: drh tags: alter-table-drop-column) | |
| 23:03 | Enhance renameParseSql() to better handle OOMs. (check-in: 68bcde7a user: drh tags: alter-table-drop-column) | |
| 22:47 | Merge changes from trunk into the alter-table-drop-column branch. (check-in: 9ea64007 user: drh tags: alter-table-drop-column) | |
| 15:45 | Improvement to the INSERT optimization of check-in [16ac213c57196361] so that it works with SQLITE_ENABLE_HIDDEN_COLUMN but is also easier to maintain and a little faster as well. (check-in: f985a78e user: drh tags: trunk) | |
| 14:27 | Disable the optimization of [16ac213c57196361] when the SQLITE_ENABLE_HIDDEN_COLUMN compile-time option is used, as the optimization does not work in that case. (check-in: 5168b06b user: drh tags: trunk) | |
| 01:02 | Add missing VdbeCoverage() macros to some of the new RETURNING code. (check-in: 53a53909 user: drh tags: trunk) | |
| 00:59 | Performance optimization in the resolver. (check-in: 1aafb94d user: drh tags: trunk) | |
| 00:26 | Performance optimization in the code generator for INSERT for the common case where the target table has neither generated nor hidden columns. Also fix a redundant (and thus unreachable) branch in the resolver. (check-in: 16ac213c user: drh tags: trunk) | |
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2021-02-17
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| 21:13 | Use the sqlite3ParserAddCleanup() mechanism to ensure that the AggInfo structure associated with an aggregate query is deallocated, for a performance increase and size reduction. (check-in: 7a139967 user: drh tags: trunk) | |
| 13:19 | Enhance the ".once" and ".output" commands in the CLI so that if the filename argument begins with "|" the name becomes the concatenation of all subsequent arguments. Hence, commands like ".once | open -f" become possible without the need for quotes. (check-in: c46a94a6 user: drh tags: trunk) | |
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2021-02-16
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| 20:32 | Simplification to the resolveAlias() routine. (check-in: 00bead39 user: drh tags: trunk) | |
| 20:01 | New SELECTTRACE macros more clearly deliniate when the query planner is invoked in the middle of PRAGMA vdbe_addoptrace output. (check-in: 7c03ce49 user: drh tags: trunk) | |
| 19:29 | Remove unnecessarily complexity from sqlite3WithReleaseByParse(). Improved TreeView output for the enhanced CTE structures. This code still does not work 100%. I'm saving my place in order to (maybe) come back to it later. (check-in: 30bb18b4 user: drh tags: as-materialize) | |
| 17:28 | • Edit [bf0fd9b23a77a8fc|bf0fd9b2]: Move to branch as-materialize. (artifact: 3e1505cf user: drh) | |
| 16:32 | Trying to get the new AS MATERIALIZE syntax of CTEs to work. There are still performance and memory management issues. This is a WIP check-in. (check-in: bf0fd9b2 user: drh tags: as-materialize) | |
| 00:48 | Change the syntax from "GENERATED AS" to "AS MATERIALIZED" so as to match the syntax of PostgreSQL 12+. (Closed-Leaf check-in: 78dcddd9 user: drh tags: with-generated-as) | |
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2021-02-15
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| 17:51 | Merge the LIKE operator fix from trunk. (check-in: 8c861878 user: drh tags: with-generated-as) | |
| 17:45 | • Edit [15692ec02b401eb8|15692ec0]: Mark "Closed". (artifact: 1eb13e10 user: drh) | |
| 17:02 | • Fixed ticket [c0aeea67]: Incorrect LIKE result plus 5 other changes (artifact: 7b22614c user: drh) | |
| 17:02 | Fix an issue with the LIKE operator when it includes the "ESCAPE '_'" clause. Ticket [c0aeea67d58ae0fd]. (check-in: 27d41179 user: drh tags: trunk) | |
| 16:51 | • New ticket [c0aeea67] Incorrect LIKE result. (artifact: 1fd8c4af user: drh) | |
| 14:55 | Merge minor fixes from trunk. (check-in: d876b287 user: drh tags: with-generated-as) | |
| 13:17 | Ensure that the ALTER TABLE statements return 0 for sqlite3_column_count(). (check-in: 29c1932a user: drh tags: trunk) | |
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2021-02-13
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| 23:46 | If the GENERATED keyword occurs before the AS keyword in a common table expression (CTE) definition, then that CTE becomes an "optimization barrier". For now, that means the CTE is always materialized. It also means that query flattener or pushdown optimizations that cross the CTE boundary are omitted. (check-in: 186ec18b user: drh tags: with-generated-as) | |
| 21:01 | Add a test-control that allows setting a LIKE pattern for common table expression names such that CTEs with matching names become an optimization barrier - They are not flattened and are implemented by materialization. (Closed-Leaf check-in: 15692ec0 user: drh tags: optbarrier-test-ctrl) | |
| 18:14 | Fix incorrect test name labels in the select1.test script. (check-in: 179c79ea user: drh tags: trunk) | |
| 16:45 | • Edit [e4f8a79fd8b3be9b|e4f8a79f]: Edit check-in comment. (artifact: 64f133ff user: drh) | |
| 16:39 | Avoid manifesting a CTE (or other view) multiple times when it is possible to reuse the first manifestation. (check-in: 9692f510 user: drh tags: trunk) | |
| 13:31 | • Edit [df1d6482f9e92daf|df1d6482]: Edit check-in comment. (artifact: 49d2628c user: drh) | |
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2021-02-12
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| 21:07 | Parsing of DML statements in a WITH clause. But at this point, it just generates an error about "not yet supported". (Leaf check-in: 964ff68d user: drh tags: dml-in-cte) | |
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2021-02-08
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| 15:56 | Correctly detect correlated subqueries when resolving names in RETURNING clauses. (check-in: b43cfa04 user: drh tags: trunk) | |
| 13:41 | Improved name resolution for references to a table begin modified from within a subquery in the RETURNING clause. (check-in: 799d205b user: drh tags: trunk) | |
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2021-02-07
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| 23:28 | Do not allow RETURNING in the DML statements of a trigger. (check-in: 7a8fe646 user: drh tags: trunk) | |
| 12:59 | Fix harmless compiler warnings. (check-in: 5f8bf995 user: drh tags: trunk) | |
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2021-02-06
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| 14:56 | Remove an ALWAYS() and NEVER() in the authorizer that become reachable as of [078dbff04a95a001]. Test case for coverage in TH3. (check-in: b469327e user: drh tags: trunk) | |
| 14:37 | Fix the OSSFuzz-discovered shift problem from two days ago. This patch was omitted from [078dbff04a95a001] apparently because I made the edit to "sqlite3.c" rather than "resolve.c" where it belongs. (check-in: 864772ff user: drh tags: trunk) | |
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2021-02-05
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| 17:34 | Remove unreachable code. Fix a shift UB problem introduced yesterday and discovered by OSSFuzz. (check-in: 078dbff0 user: drh tags: trunk) | |
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2021-02-04
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| 23:20 | Change the RETURNING algorithm so that outputs accumulate in an ephemeral table until all modifications have been completed, and only then do results start being returned. This should help prevent problems with interleaved sqlite3_step() calls on two separate DML statements. It also seems to be closer to how PostgreSQL works, which might prevent compatibility problems. (check-in: c4615eb2 user: drh tags: trunk) | |
| 22:59 | Remove dead code. Fix RETURNING for INSERT into a virtual table. (Closed-Leaf check-in: dbfa3869 user: drh tags: returning-manifested) | |
| 21:17 | Fix an issue with RETURNING from UPSERT. (check-in: 757b74ba user: drh tags: returning-manifested) | |
| 20:52 | Snapshot. New design appears to work on a simple test case. (check-in: 8a65fbee user: drh tags: returning-manifested) | |
| 17:29 | Preliminary changes for a new implementation of RETURNING that captures all results in a buffer and plays them all back after the DML statement completes. This avoids problems with interleaved DML statements. This particular check-in is a non-functional work in progress. (check-in: 04b77d63 user: drh tags: returning-manifested) | |
| 13:52 | Add NEVER() to a branch that check-in [5d54d9fd40638138] apparently made unreachable. (check-in: 5c8e6296 user: drh tags: trunk) | |
| 13:44 | Performance optimization in sqlite3FinishCoding(). (check-in: 0f34f241 user: drh tags: trunk) | |
| 11:14 | Work toward handling interleaved RETURNING statements. Trunk does not handle that case correctly. This branch is a partial implementation of ideas that might, however. (Closed-Leaf check-in: e1eb6213 user: drh tags: interleaved-returning) | |
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2021-02-03
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| 18:32 | Change the name of Vdbe.magic to Vdbe.iVdbeMagic to disambiguate with sqlite3.magic. (check-in: 6b29e549 user: drh tags: trunk) | |
| 13:20 | Fix a harmless compiler warning. (check-in: 1eb69c64 user: drh tags: trunk) | |
| 13:11 | • Edit [416c898bfb8ff963|416c898b]: Edit check-in comment. (artifact: 0f6b6b04 user: drh) | |
| 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) | |
| 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) | |