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12 check-ins related to "merge-sort"
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2011-09-03
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| 17:07 | Performance improvements to the external merge-sorter. Keep content on an in-memory linked lists rather than an ephemeral table prior to spilling to disk. Use the external merge-sorter to implement ORDER BY and GROUP BY in addition to CREATE INDEX. (check-in: 4c43e8b2d2 user: drh tags: trunk) | |
| 16:42 | Simplification and performance tweaks in vdbeSorterMerge(). (Closed-Leaf check-in: 99e34bdce4 user: drh tags: merge-sort) | |
| 14:36 | Reduce the number of VdbeRecordUnpack() calls made in vdbesort.c. (check-in: 666c2c3cff user: dan tags: merge-sort) | |
| 00:17 | The build works again with -DSQLITE_OMIT_MERGE_SORT. The merge-sorter now avoids spilling to disk (letting the in-memory linked list grow without bound) if PRAGMA temp_store=3. (check-in: 68e26c4487 user: drh tags: merge-sort) | |
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2011-09-02
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| 21:42 | Remove some dead code. Fix a faulty assert(). Improve some variable names. (check-in: a9a64592cf user: drh tags: merge-sort) | |
| 18:03 | Combine two malloc calls in vdbesort.c. (check-in: cf48ad8353 user: dan tags: merge-sort) | |
| 15:41 | Reduce the number of malloc() calls made when creating an index on more than 2 columns. (check-in: 065b0c9858 user: dan tags: merge-sort) | |
| 11:45 | If all data being sorted fits in memory, avoid writing any data out to temporary files in vdbesort.c. (check-in: 71075673c6 user: dan tags: merge-sort) | |
| 10:31 | Instead of a temporary b-tree, use a linked-list and merge-sort to sort records in main memory in vdbesort.c. (check-in: 7769fb988d user: dan tags: merge-sort) | |
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2011-09-01
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| 16:01 | Use OP_SorterOpen instead of OP_OpenEphemeral to implement GROUP BY. (check-in: ebf819aaa5 user: drh tags: merge-sort) | |
| 15:32 | Experimental code-generator changes to utilize new opcodes for sorting. (check-in: bab2e560f6 user: drh tags: merge-sort) | |
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2011-08-31
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| 23:57 | Avoid using uninitialized variables after failures in the merge sort code. (check-in: 2869ed2829 user: drh tags: trunk) | |