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17 check-ins using file src/sqliteInt.h version 5ecde219
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2014-09-24
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| 04:38 | Experiment using linear interpolation, instead of a strict binary search, when looking for integer-keyed rows on a single b-tree page. The experiment was not successful. The number of key comparisons is reduced by about 15%, but the added complexity of the search logic causes an overall reduction in performance. The patch is saved for historical reference only. (Closed-Leaf check-in: c705cf85 user: drh tags: linear-interpolation) | |
| 02:05 | Have the clearCell() routine return the cell size to the caller, rather than have the caller make a separate call to cellSizePtr(). (check-in: f21d2175 user: drh tags: trunk) | |
| 01:23 | Shorten all lines of source code in btree.c to at most 80 characters. No logical changes. (check-in: 5dd41cdb user: drh tags: trunk) | |
| 00:59 | Add the MemPage.noPayload boolean and use it to help cellSizePtr() and btreeParseCellPtr() run faster. (check-in: 8e337531 user: drh tags: trunk) | |
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2014-09-23
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| 23:12 | Remove an unused C-preprocessor macro. No functional changes to the code. (check-in: f480582c user: drh tags: trunk) | |
| 22:36 | Avoid calling btreeParseCellPtr() from within fillInCell() since most of what btreeParseCellPtr() computes is ignored by fillInCell(). Instead, have fillInCell() compute the values it needs inline. Performance improvement. (check-in: 4147f667 user: drh tags: trunk) | |
| 21:25 | Simplify the CellInfo structure for a size reduction and performance improvement. (check-in: bf59df66 user: drh tags: trunk) | |
| 18:30 | Add the "multiplex_truncate" PRAGMA to the multiplexor extension, for querying and setting the truncate flag on a database connection. (check-in: d2962a5f user: drh tags: trunk) | |
| 01:40 | Adjust skip-scan cost estimates slightly so that a full table scan is preferred over a skip-scan to a column with only two distinct values. (check-in: ae9a42b2 user: drh tags: trunk) | |
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2014-09-22
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| 20:38 | Fix to payload size overflow detection in the cellSizePtr() change of the previous check-in. (check-in: 76097440 user: drh tags: trunk) | |
| 19:51 | Size reduction and substantial performance increase for cellSizePtr(). (check-in: bc8bbf32 user: drh tags: trunk) | |
| 14:30 | Tune the query planner to be more aggressive about using automatic indexes on views and subqueries for which there is not opportunity to declare a persistent schema index. (check-in: 41de1643 user: drh tags: trunk) | |
| 03:22 | Disable shared memory operations using the unix-nolock VFS. (check-in: 10a6e510 user: drh tags: trunk) | |
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2014-09-21
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| 22:31 | Correctly handle an ORDER BY clause on an outer query when applying the compound-subquery flattening optimization. Ticket [d11a6e908f]. Also add the SQLITE_ENABLE_SELECTTRACE option for additional debugging and analysis information about select statement processing. (check-in: d5880abd user: drh tags: trunk) | |
| 20:31 | Add test cases for ticket [d11a6e908f]. (Closed-Leaf check-in: 9683e001 user: drh tags: select-trace) | |
| 17:51 | Add the "showauth" extension in ext/misc. (check-in: 28d52c1c user: drh tags: select-trace) | |
| 00:27 | Improved ".selecttrace" output. (check-in: c0b61f70 user: drh tags: select-trace) | |