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29 check-ins using file src/select.c version ed459f7f
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2014-05-07
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| 15:32 | Fix nolock and immutable so that they work even if READONLY is requested. (Closed-Leaf check-in: e193aced user: drh tags: win32-none) | |
| 15:09 | Add test cases and documentation for the nolock and immutable query parameters. (check-in: 19d56cba user: drh tags: win32-none) | |
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2014-05-01
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| 20:24 | Add #ifdefs for test coverage. Add a testcase(). (check-in: be2702ce user: drh tags: trunk) | |
| 10:19 | Update a test case in wal2.test that explicitly corrupts a checksum in the wal file to account for the fact that the first byte of said checksum may initially be 0xFF. (check-in: 2b935bde user: dan tags: trunk) | |
| 01:49 | Take out the special handling of nolock=true in os_win.c and add it to pager.c, so that it works for all VFSes. Add the pPager->noLock boolean for clarity. (check-in: 725c1c14 user: drh tags: win32-none) | |
| 01:20 | Avoid unnecessary xUnlock operations on temp file. (check-in: 1829c38c user: drh tags: win32-none) | |
| 01:13 | Add the immutable=TRUE query parameter and SQLITE_IOCAP_IMMUTABLE, either of which prevents locking of the database and omits tests for existance of journal files. (check-in: 71f152c8 user: drh tags: win32-none) | |
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2014-04-30
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| 20:32 | Merge in all recent changes and enhancements from trunk. (check-in: 84243f84 user: drh tags: win32-none) | |
| 18:11 | Fix a problem in calculating the costs of "OR" scans. (check-in: 9bbca48b user: dan tags: trunk) | |
| 15:22 | Modify the way the costs of various query plans are estimated. If the user supplies a likelihood() value (or equivalent) on an indexed WHERE constraint, use it to estimate the number of index rows visited. (check-in: 90e36676 user: dan tags: trunk) | |
| 15:00 | Add text to the header comment of whereLoopAddBtree() describing how the costs of various b-tree loops are estimated. (Closed-Leaf check-in: 05e6e16c user: dan tags: experimental-costs) | |
| 14:53 | Update a couple of test cases to account for the fact that this branch prefers an index scan and partial sort over a full-table scan and full external sort. (check-in: 9b975bf3 user: dan tags: experimental-costs) | |
| 14:47 | Fix a couple of out-of-date comments in where.c. (check-in: eefeda32 user: dan tags: experimental-costs) | |
| 14:22 | Improved rendering of LogEst values corresponding to real values near 0.0 in the tool/logest.c utility program. (check-in: 32910c8c user: drh tags: experimental-costs) | |
| 13:19 | Fix long-standing typos in comments. (check-in: b9f91317 user: drh tags: experimental-costs) | |
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2014-04-29
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| 19:01 | Test that the default values used when sqlite_stat1 data is not available are calculated correctly. Fixes for the same. (check-in: e2d42f90 user: dan tags: experimental-costs) | |
| 16:46 | Merge trunk changes into this branch. (check-in: d74299f0 user: dan tags: experimental-costs) | |
| 16:10 | Ignore likelihood() values on indexed IPK lookups. (check-in: 5bb7757a user: dan tags: experimental-costs) | |
| 12:01 | Fix a test case so that it updates sqlite_stat1 consistently. (check-in: 2dc5a0b5 user: dan tags: experimental-costs) | |
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2014-04-28
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| 20:11 | Do not reduce the number of rows scanned at all for "IS NOT NULL" constraints. Fix a bug in calculating the number of rows visited by scans of partial indicies. (check-in: a8ae93f0 user: dan tags: experimental-costs) | |
| 19:34 | The trunk assumes that an open range constraint on an indexed term (col>?) term matches 1/4 of the indexed rows, and that a closed constraint (col BETWEEN ? AND ?) matches 1/64. Change this branch to do the same. (check-in: 4047ac75 user: dan tags: experimental-costs) | |
| 15:11 | Update unordered.test to take into account for the fact that SQLite now prefers a full-table scan over a non-covering index scan that visits a large percentage of the table rows. (check-in: 20f468df user: dan tags: experimental-costs) | |
| 12:08 | Add an extra column to a table in analyze9.test to give the planner a little more reason to select an index. (check-in: 1b95544f user: dan tags: experimental-costs) | |
| 10:00 | Update test script analyze3.test to account for the fact that SQLite now prefers a full-table scan over a non-covering index scan that visits a large percentage of the table rows. (check-in: 35f46a55 user: dan tags: experimental-costs) | |
| 09:35 | Modify internal function whereLoopAdjustCost() so that it does not prefer a skip-scan over a regular index scan even if the regular scan uses a subset of the WHERE terms used by the skip-scan. (check-in: 88a5758d user: dan tags: experimental-costs) | |
| 08:49 | Fix an error in estimating of the number of rows visited by a range scan. (check-in: d491de62 user: dan tags: experimental-costs) | |
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2014-04-26
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| 20:21 | Fix an sqlite3_stmt_status() problem caused by recent changs on this branch. (check-in: dee20409 user: dan tags: experimental-costs) | |
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2014-04-25
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| 20:22 | If the user provides likelihood() data for a WHERE clause term used as part of an index key, have the planner use it when calculating the expected number of rows visited by the loop. (check-in: c51efaa5 user: dan tags: experimental-costs) | |
| 15:01 | Store values loaded from the stat1 table as logarithmic values in memory. (check-in: 1bd74c49 user: dan tags: experimental-costs) | |