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6 check-ins using file src/btree.c version c1d7d81d
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2011-04-15
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| 15:18 | Backport check-in [9f9f32882501ac9] to provide EXPLAIN QUERY PLAN output for the count(*) optimization. Also backport check-in [a8761a9128de945aa] to prevent unordered indices from being used on a full table scan. The first backport was necessary in order to test the second. (check-in: 8d924e16 user: drh tags: branch-3.7.2) | |
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2011-04-09
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| 03:30 | Back port the unordered-index-hack to the 3.7.2 branch. (check-in: 80353020 user: drh tags: branch-3.7.2) | |
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2011-04-08
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| 23:36 | Backport test cases from trunk that seek to prove that the IS NOT NULL query optimization is working. (check-in: 9eff4702 user: drh tags: branch-3.7.2) | |
| 23:05 | Make sure the query planner is able to correctly analyze NULL value samples in the sqlite_stat2 table. This is a backport of changes from check-in [f73a167b434f] (check-in: 1d637889 user: drh tags: branch-3.7.2) | |
| 23:04 | Make sure the left-hand side of the IS NOT NULL operator is a simple column and not a general expression before applying the IS NOT NULL optimization. This is a backport of check-in [543f75a6abe3]. (check-in: e8177e01 user: drh tags: branch-3.7.2) | |
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2011-03-31
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| 18:36 | Provide hints to the btree layer Next and Previous primitives to let them know if they can be no-ops if the underlying index is unique. (check-in: a5aae174 user: drh tags: branch-3.7.2) | |