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History of src/walker.c
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2019-07-19
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| 15:00 | Refinement to check-in [348e7f193a963390] that avoids unreachable branches. file: [d5a94907] check-in: [bbfb2908] user: drh branch: trunk, size: 7006 | |
| 11:20 | Fix a problem with renaming tables when the schema contains WINDOW definitions with (illegal) non-numeric expressions as part of a PRECEDING or FOLLOWING clause. file: [20a8455c] check-in: [348e7f19] user: dan branch: trunk, size: 6669 | |
| 10:31 | Fix a faulty assert() in walker.c that could fail when processing an ALTER TABLE statement on a schema containing invalid table references that are part of a WINDOW definition. file: [8fb08ed5] check-in: [ee076c28] user: dan branch: trunk, size: 6537 | |
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2019-07-13
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| 16:22 | Rework the FILTER clause implementation to share more code with window functions. file: [ccbe57a6] check-in: [5dac8c38] user: dan branch: filter-clause, size: 6422 | |
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2019-07-10
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| 20:16 | Minor performance improvement in sqlite3ExprDeleteNN(). file: [588e7f5f] check-in: [bcc8b38a] user: dan branch: filter-clause, size: 6647 | |
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2019-07-02
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| 11:56 | Experimental implementation of FILTER clause for aggregate functions. file: [31844651] check-in: [1f1ae2d6] user: dan branch: filter-clause, size: 6408 | |
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2019-01-24
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| 04:44 | Remove an unreachable branch. file: [7607f1a6] check-in: [4c976f17] user: drh branch: trunk, size: 6285 | |
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2019-01-23
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| 16:59 | Fix problems with sub-selects in WINDOW definitions. Also rename-column operations when the column being renamed appears in a WINDOW definition that is part of a VIEW or TRIGGER. file: [ec63d6e2] check-in: [0387cb3a] user: dan branch: trunk, size: 6248 | |
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2018-09-20
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| 19:02 | Combine the Expr.pTab and Expr.pWin fields into a union named "y". Add a new EP_WinFunc property that is only true if Expr.y.pWin is a valid pointer. This reduces the size of the Expr object by 8 bytes, reduces the overall amount of code, and shaves over 1 million cycles off of the speed test. file: [fb94aadc] check-in: [ad130bb8] user: drh branch: trunk, size: 5693 | |
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2018-09-19
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| 14:54 | Reduce the size of Expr from 80 to 72 bytes moving the pRight field inside the "x" union. This is an incremental check-in that still has issues. file: [4ba292ca] check-in: [147c61a6] user: drh branch: expr-simplify, size: 5710 | |
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2018-09-18
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| 21:35 | In the Expr object, the Expr.eX field determines what value is stored in the Expr.x union. This mostly works, but there are issues identified by valgrind. file: [b2d62136] check-in: [8849a463] user: drh branch: expr-simplify, size: 5793 | |
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2018-06-25
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| 11:42 | Fix another problem that could cause a crash when a window function was used in a view. file: [ba722577] check-in: [e954145a] user: dan branch: exp-window-functions, size: 5707 | |
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2018-06-23
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| 19:29 | Fix problems with using window-functions in correlated sub-queries. file: [14c43912] check-in: [3e23cfc8] user: dan branch: exp-window-functions, size: 5630 | |
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2017-11-14
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| 23:48 | In the parse tree, combine LIMIT and OFFSET into a single expression rooted on a TK_LIMIT node, for a small code size reduction and performance increase, and a reduction in code complexity. file: [da987a20] check-in: [3925facd] user: drh branch: trunk, size: 5333 | |
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2017-10-31
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| 03:40 | Remove unnecessary NEVER() and ALWAYS() conditionals. file: [d591e8a9] check-in: [1c80c75d] user: drh branch: trunk, size: 5396 | |
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2017-08-17
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| 19:23 | Small optimization in the Expr tree walker. file: [3ccfa863] check-in: [264a5e1b] user: drh branch: trunk, size: 5421 | |
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2017-07-07
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| 13:59 | Exploit the fact that Expr.pRight and Expr.x are never used at the same time for a small performance gain. file: [a7ca64ce] check-in: [aacbb9a4] user: drh branch: trunk, size: 5383 | |
| 12:58 | More efficient and compact implementation of walkExpr(). file: [3541df29] check-in: [115d4b83] user: drh branch: trunk, size: 5314 | |
| 11:49 | Very slightly smaller and faster sqlite3WalkSelect(). file: [8fa7438b] check-in: [9bc65635] user: drh branch: trunk, size: 5298 | |
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2017-05-29
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| 14:26 | Optimizations to the Walker object and its methods to make the code a little smaller and to help it run a little faster. file: [d46044e7] check-in: [6854a34e] user: drh branch: trunk, size: 5254 | |
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2017-03-07
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| 12:18 | Minor comment typo fixes. No changes to code. file: [b71a992b] check-in: [01cd9fb1] user: drh branch: trunk, size: 5309 | |
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2016-09-23
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| 21:36 | Add the EP_Leaf flag bit to the Expr.flags field to indicate Expr nodes that do not have substructure. Use that bit to avoid unnecessary recursion. file: [91a6df74] check-in: [8a6ea455] user: drh branch: trunk, size: 5305 | |
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2016-09-19
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| 02:19 | Small performance optimization in the expression walker. file: [83042807] check-in: [c6e6afb9] user: drh branch: trunk, size: 5286 | |
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2016-08-10
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| 18:56 | Performance enhancement in the expression walker. file: [2d2cc7fb] check-in: [ebccbd96] user: drh branch: trunk, size: 5265 | |
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2016-01-11
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| 14:19 | Performance optimization in sqlite3WalkExpr(). file: [0f142b5b] check-in: [2f8bd5fa] user: drh branch: trunk, size: 5273 | |
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2015-08-19
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| 17:11 | A list of arguments following a table name translates into equality constraints against hidden columns in that table. file: [2e14d17f] check-in: [40e12cfe] user: drh branch: table-valued-functions, size: 5185 | |
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2014-09-06
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| 16:39 | Fix typos in comments. No code changes. file: [c253b95b] check-in: [e62aab5e] user: peter.d.reid branch: trunk, size: 5053 | |
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2014-05-06
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| 15:28 | Experimental changes that reduce the size of Expr objects from 72 to 64 bytes each on x64 and from 48 to 44 bytes each on x32. file: [4a73ee39] check-in: [8ad0a123] user: drh branch: smaller-expr, size: 5146 | |
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2014-01-17
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| 14:59 | Fix some problems to do with WITH clauses and name resolution. file: [11edb74d] check-in: [6a549187] user: dan branch: common-table-expr, size: 5052 | |
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2013-09-12
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| 16:50 | Increase the number of bits available in Expr.flags. Other tweaks aimed at making expression processing more robust. file: [e9e593d5] check-in: [579a5125] user: drh branch: expr-tuning, size: 5175 | |
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2013-04-25
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| 00:57 | Make sure the affinity and datatype of sub-subqueries are initialized prior to subqueries as the latter relies on the former. file: [4fa43583] check-in: [39b4e6ff] user: drh branch: trunk, size: 5178 | |
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2012-08-23
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| 19:46 | Add test cases and fix bugs associated with the previous check-in enhancements to nested aggregate subquery processing. file: [3d75ba73] check-in: [00b1dc71] user: drh branch: nested-agg, size: 4630 | |
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2009-11-10
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| 01:30 | Remove the obsolete "$Id:$" RCS identifier strings from the source code. file: [3112bb3a] check-in: [f6c045f6] user: drh branch: trunk, size: 4552 | |
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2009-06-15
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| 23:15 | Additional updates to the symbol resolver and expression tree walker to facilitate test coverage. (CVS 6764) file: [1edca756] check-in: [a49c2d4b] user: drh branch: trunk, size: 4608 | |
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2009-05-28
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| 01:00 | Additional refinements to Expr handling. Restore compression of trigger expressions. Change Expr.zToken to Expr.u.zToken and added Expr.u.iValue. Remove an unnecessary ExprDup from CHECK constraint processing. And so forth. (CVS 6682) file: [ec4b9742] check-in: [4ac2bdfb] user: drh branch: trunk, size: 4624 | |
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2009-05-27
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| 10:31 | Simplifications to the Expr object: Remove Expr.span completely and convert Expr.token into a char* Expr.zToken. Also simplify the Token object by removing the Token.dyn and Token.quoted fields. (CVS 6681) file: [b28cc618] check-in: [7cb1c3ba] user: drh branch: trunk, size: 4624 | |
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2009-04-08
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| 13:51 | Minor refactoring of the expression-compaction logic for clarity of presentation. New comments added. The EXPRDUP_DISTINCTSPAN flag is removed as obsolete. (CVS 6470) file: [7cdf6322] check-in: [44ded2ea] user: drh branch: trunk, size: 4689 | |
| 12:21 | Do not attempt to walk a TokenOnly or SpanOnly expression tree node. Ticket #3791. (CVS 6469) file: [b32028f4] check-in: [8362d883] user: drh branch: trunk, size: 4673 | |
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2009-02-19
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| 14:39 | Changes to reduce the heap space consumed by triggers, views and tables in the in-memory representation of the schema. Also to reduce the space used by prepared statements slightly. (CVS 6305) file: [42bd3f00] check-in: [d9f6ffbc] user: danielk1977 branch: trunk, size: 4473 | |
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2008-08-20
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| 16:35 | Refactor the name resolution procedures in the code generator. (CVS 5569) file: [488c2660] check-in: [daf730d1] user: drh branch: trunk, size: 4405 Added | |