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30 check-ins using file src/pager.c version 60d79b73d9
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2011-02-19
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| 14:19 | Changes which attempt to address an obscure SQLITE_PROTOCOL error. (Leaf check-in: 1725aa7501 user: drh tags: wal-trace-375) | |
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2011-01-28
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| 03:13 | Reactivate the analyze5.test script. (Closed-Leaf check-in: a2a9f6401c user: drh tags: stat2-enhancement) | |
| 01:57 | Change the weighting of binary searches on tables to 1/10th the cost of a search on an index. Change the assumed reduction in search space from a indexed range constraint from 1/3rd to 1/4th. Do not let the estimated number of rows drop below 1. (check-in: 4847c6cb71 user: drh tags: stat2-enhancement) | |
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2011-01-25
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| 09:54 | Fix a problem in memsubsys1.test. Modifications to test code only. (check-in: 7ef3f7cba7 user: dan tags: trunk) | |
| 04:34 | Shave a few cycles so that performance is better than 3.7.4 in speed tests. (check-in: e146493011 user: drh tags: trunk) | |
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2011-01-24
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| 20:18 | Modify the test_quote.c demonstration shim so that it works when SQLITE_THREADSAFE=0 is defined. (check-in: b70bcccaf5 user: drh tags: trunk) | |
| 19:45 | Fix a typo in the documentation for sqlite3_snprintf(). No changes to code. (check-in: 8d1065411a user: drh tags: trunk) | |
| 19:14 | Fix a harmless compiler warning (a shadowed local variable) in analyze.c. (check-in: a1ad7fb38b user: drh tags: trunk) | |
| 17:46 | Restructuring and generalizing analyze5.test. The whole script is currently disabled and will need to be reenabled prior to merging with trunk. (check-in: 31fcc7067b user: drh tags: stat2-enhancement) | |
| 16:00 | Ensure that if a deferred FK constraint is violated by a statement that creates its own implicit transaction, the statement is not an "active-write" after sqlite3_step() returns. (Closed-Leaf check-in: 8063197ef1 user: dan tags: deferred-fk-quirk) | |
| 15:11 | Change the cost estimator in the query planner to take into account the logN rowid lookup cost when going from an index to a table. (check-in: b442525b0b user: drh tags: stat2-enhancement) | |
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2011-01-22
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| 13:32 | Modify the trace callback mechanism so that SQL commands executed from within virtual table or user function callbacks are passed to the trace callback without parameter expansion and enclosed in SQL comments. (check-in: a764915b87 user: dan tags: trunk) | |
| 00:10 | Add the ability to use indices for constraints of the form "x IS NOT NULL" when sqlite_stat2 is available and most entries for column x are NULL. (check-in: 5d5bddd290 user: drh tags: stat2-enhancement) | |
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2011-01-21
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| 18:25 | Change sqlite3StrAccumAppend() to use realloc instead of malloc. (check-in: 380f61df07 user: dan tags: trunk) | |
| 18:18 | Adjustments to the result row estimator for the IN operator so that it gives the same estimates as the equivalent OR operator. Test cases for the same. (check-in: c82cb9c028 user: drh tags: stat2-enhancement) | |
| 16:27 | Make use of histogram data to make better estimates for the number of rows that will be returned from "x IN (v1,v2,v3,...)" constraints. (check-in: fd3977a27a user: drh tags: stat2-enhancement) | |
| 15:52 | Add options to test command [do_faultsim_test] to support testing VFS implementations. (check-in: 503ad889da user: dan tags: trunk) | |
| 14:37 | Add the ability to use indices when a range contraint is bounded on the lower end by NULL. (check-in: f73a167b43 user: drh tags: stat2-enhancement) | |
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2011-01-20
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| 20:36 | Update ANALYZE test cases to check out the use of histograms for equality constraints. (check-in: c7b59afaf0 user: drh tags: stat2-enhancement) | |
| 16:52 | Use histogram data to improve the row-count estimates on equality constraints. (check-in: 6bfc5c69eb user: drh tags: stat2-enhancement) | |
| 02:56 | The first of a planned series of enhancements to the query planner that enable it to make better use of sqlite_stat2 histograms when the table has many repeated values. (check-in: 2cd374cd23 user: drh tags: stat2-enhancement) | |
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2011-01-19
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| 21:58 | Comment improvements in pcache1.c. No changes to code. (check-in: 9660a0a225 user: drh tags: trunk) | |
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2011-01-18
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| 17:34 | Pull over all the latest trunk changes. (check-in: ca86d04be1 user: drh tags: wal-trace-375) | |
| 17:03 | Do not use mutexes in the pcache implementation unless SQLITE_ENABLE_MEMORY_MANAGMENT is defined. This is a performance enhancement. A side effect is that pcaches will not steal pages from one another unless ENABLE_MEMORY_MANAGEMENT is set, or unless SQLITE_THREADSAFE=0. (check-in: e5ca59e63b user: drh tags: trunk) | |
| 16:13 | Get all test cases working with the mutex-free-pcache implementation. (Closed-Leaf check-in: 2dc98d2999 user: drh tags: mutex-free-pcache) | |
| 15:17 | Do not use SQLITE_MUTEX_STATIC_MEM2 since it has been reused as STATIC_OPEN. Instead, create a new static mutex STATIC_PMEM which is an alias for the unused STATIC_LRU2. (check-in: f1cf02efcb user: drh tags: mutex-free-pcache) | |
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2011-01-17
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| 21:32 | Here is a completely new implementation of the mutex-free-pcache. This one uses a common code base and automatically selects whether or not to use mutexes depending on compile-time and start-time options. (check-in: d094a1bfb7 user: drh tags: mutex-free-pcache) | |
| 18:30 | Fix a typo in the documentation for sqlite3_stmt_readonly(). (check-in: 56417a3386 user: drh tags: trunk) | |
| 17:42 | Add the SQLITE_OMIT_AUTORESET compile-time option which if enabled causes the sqlite3_step() routine to return SQLITE_MISUSE if it is called after it has previously returned anything other than SQLITE_ROW, SQLITE_BUSY, or SQLITE_LOCKED. (check-in: 053ce76deb user: drh tags: trunk) | |
| 02:24 | Add back an ALWAYS() to regain full test coverage. (check-in: b93f6f3e67 user: drh tags: trunk) | |