/ Timeline
Login
SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

31 check-ins tagged with "cursor-hints"

2016-06-20
17:22
Allow LIKE operators that appear in a WHERE clause to be included in the cursor-hint for a cursor on the rhs of a LEFT JOIN. Closed-Leaf check-in: 7455d932 user: dan tags: cursor-hints
2016-06-17
19:27
Include WHERE terms in the cursor-hint passed to a cursor opened for the rhs of a LEFT JOIN iff we can be sure that those terms will not evaluate to true if the LEFT JOIN generates a row of NULLs. check-in: 998095ab user: dan tags: cursor-hints
14:59
Fix a duplicate test name in cursorhint2.test. check-in: fcd12b69 user: dan tags: cursor-hints
14:47
Fix a typo in the cursorhint2.test script. check-in: c1a5a57c user: dan tags: cursor-hints
14:33
If a table is on the rhs of a LEFT JOIN, include only terms from the joins ON(...) clause in the cursor-hint passed via OP_CursorHint. check-in: 2a2346b0 user: dan tags: cursor-hints
2015-10-27
13:24
Split out sqlite3BtreeCursorHintFlags() from sqlite3BtreeCursorHint() the interface for improved performance. Closed-Leaf check-in: b3ec9a0d user: drh tags: cursor-hints
2015-10-26
20:11
Merge the BTREE_FORDELETE enhancement with this branch. check-in: 20da0849 user: dan tags: cursor-hints
18:51
Merge in all trunk changes prior to the BTREE_FORDELETE enhancement. check-in: 53d5a4ad user: drh tags: cursor-hints
2015-10-16
20:53
Merge recent enhancements from trunk. Version now 3.9.1. check-in: 26fa091d user: drh tags: cursor-hints
2015-10-14
20:09
Merge in all the 3.9.0 updates from trunk. check-in: 29444149 user: drh tags: cursor-hints
2015-09-24
15:06
Merge trunk changes into the cursor-hints branch. check-in: fbe63762 user: drh tags: cursor-hints
2015-09-15
17:31
Merge enhancements from trunk. check-in: 66fe0683 user: drh tags: cursor-hints
2015-09-03
14:39
Merge enhancements from trunk. check-in: 25ee3000 user: drh tags: cursor-hints
2015-09-01
18:31
Merge enhancements from trunk. check-in: 29570a60 user: drh tags: cursor-hints
2015-08-20
23:45
Merge recent enhancements from trunk, including table-valued expressions. check-in: b9927c87 user: drh tags: cursor-hints
2015-08-18
15:58
Provide hints for all terms in a range constraint if there are any equality terms anywhere in the constraint. Range constraint terms are only omitted for a pure range constraint with no equality prefix. check-in: b5897bc0 user: drh tags: cursor-hints
2015-08-17
17:19
Avoid generating hints using constraints that are also used to initialize the cursor, since presumably the cursor already knows about those constraints. check-in: 142b048a user: drh tags: cursor-hints
2015-08-15
00:51
Change the display of the P4 operand of CursorHint in EXPLAIN output to function notation. check-in: bee73d42 user: drh tags: cursor-hints
2015-08-14
23:57
Always provide the BTREE_BULKLOAD hint, even when SQLITE_ENABLE_CURSOR_HINTS is not defined, as that hint gives a 4% performance increase. check-in: 83a84435 user: drh tags: cursor-hints
20:08
Updated testing of cursor-hints. Remove the test_cursorhint.c file and associated logic in the core and do tests based purely on the newly enhanced EXPLAIN output. check-in: bf383e66 user: drh tags: cursor-hints
18:50
Fix the cursor hint mechanism so that it does the right thing for indexed lookups. check-in: 581e3d49 user: drh tags: cursor-hints
15:05
Refactor the sqlite3BtreeCursorHint() interface for improved maintainability. check-in: fc3fb5cd user: drh tags: cursor-hints
01:03
Fix the CursorHint so that it includes the scan boundary constraints. On the expression text for the CursorHint opcode, show rowid correctly. check-in: f0d428d1 user: drh tags: cursor-hints
2015-08-13
21:38
Fix a harmless compiler warning. check-in: 608ab4ac user: drh tags: cursor-hints
21:32
Convert the hint expression of the CursorHint opcode into a string for display by EXPLAIN. check-in: 20688471 user: drh tags: cursor-hints
20:34
Fix a bug in sqlite3ExprContainsSubquery(). check-in: be254715 user: drh tags: cursor-hints
20:07
Merge in all the trunk changes from the previous year. This breaks the cursor-hint mechanism, but provides a baseline for trouble-shooting. check-in: 82a7a61b user: drh tags: cursor-hints
2014-07-15
11:59
Add simple tests for new sqlite3BtreeCursorHint() functionality. check-in: 1efa6ed5 user: dan tags: cursor-hints
2014-07-14
19:04
In the expression passed to sqlite3BtreeCursorHint() for the inner loops of joins, replace any TK_COLUMN references to columns in the outer loops with TK_REGISTER expressions (Expr.iTable indicates the specific register containing the value). There are no automated tests for this yet. check-in: f9dddd00 user: dan tags: cursor-hints
2013-12-07
23:35
Do not allow cursor hints to use expressions containing subqueries. This change fixes the problem seen in the previous check-in. check-in: bfefc575 user: drh tags: cursor-hints
20:39
If the SQLITE_ENABLE_CURSOR_HINTS macro is defined, then invoke the sqlite3BtreeCursorHint() interface to provide hints to the storage engine about rows that need not be returned. Hints can be disabled using SQLITE_TESTCTRL_OPTIMIZATIONS with SQLITE_CursorHints (0x2000). Cursor hints are not used by the built-in storage engine of SQLite but might be useful to applications that provide their own storage engine. The current code is work-in-progrss and contains bugs. check-in: 3a9bec52 user: drh tags: cursor-hints