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8 check-ins using file src/select.c version cc9129bc
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2017-04-14
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| 22:41 | Fix to the decision logic for when to use the skip-ahead-distinct optimization. (Closed-Leaf check-in: e50fd489 user: drh tags: skip-ahead-distinct) | |
| 12:27 | Remove an incorrect ALWAYS(). (check-in: f956f6ae user: drh tags: trunk) | |
| 00:45 | Fix a couple of unreachable branches. (check-in: 1aa0ea8d user: drh tags: skip-ahead-distinct) | |
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2017-04-13
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| 21:29 | Fix the skip-ahead-distinct optimization so that it works with indexes that have repeated columns with different collating sequences. (check-in: ce1e2b88 user: drh tags: skip-ahead-distinct) | |
| 19:48 | Simplification of the skip-ahead-distinct logic. There is still an issue with handling COLLATE. (check-in: 57c5173b user: drh tags: skip-ahead-distinct) | |
| 18:33 | New test cases and minor fixes for the optimization on this branch. (check-in: 70ac9ea1 user: dan tags: skip-ahead-distinct) | |
| 13:01 | Only use the skip-ahead-distinct optimization if the index has been analyzed and we know that a skip-head is likely to skip over at least 11 rows. The magic number 11 was determined by experimentation. (check-in: 0cf16dec user: drh tags: skip-ahead-distinct) | |
| 01:19 | Forward port the skip-ahead-distinct branch which was abandoned for some reason that I do not recall. This port should have been achived by a merge of trunk into the previous head of skip-ahead-distinct, but that did not work. So I had to manually "rebase" the changes. (check-in: 132339a1 user: drh tags: skip-ahead-distinct) | |