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Overview
| Comment: | Change the recursive common table expression algorithm to use a queue instead of a pair of tables. Runs about 25% faster on the sudoku solver query. The OP_SwapCursors opcode is no longer required. The current implementation uses just a fifo, but the plan is to change it into a queue that will support ORDER BY and LIMIT in a recursive query. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | cte-via-queue |
| Files: | files | file ages | folders |
| SHA1: |
b2671e1133d2f1fbd36e7cd4b86d6cc7 |
| User & Date: | drh 2014-01-21 22:25:45 |
Context
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2014-01-22
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| 00:23 | Remove an unnecessary parameter from selectInnerLoop(). Clean up comments. (check-in: 5e6c4a55 user: drh tags: cte-via-queue) | |
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2014-01-21
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| 22:25 | Change the recursive common table expression algorithm to use a queue instead of a pair of tables. Runs about 25% faster on the sudoku solver query. The OP_SwapCursors opcode is no longer required. The current implementation uses just a fifo, but the plan is to change it into a queue that will support ORDER BY and LIMIT in a recursive query. (check-in: b2671e11 user: drh tags: cte-via-queue) | |
| 15:04 | Remove the undocumented requirement for applications that use an SQLITE_ENABLE_SQLLOG build to define a sqlite3_init_sqllog() function. (check-in: 5e43bf01 user: dan tags: trunk) | |
Changes
Changes to src/select.c.
Changes to src/shell.c.
Changes to src/vdbe.c.
Changes to src/where.c.