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 OP_Column-refactor

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Commits on Nov 21, 2013

• Reduce the size of VdbeCursor again, this time without a performance hit.

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• Unpack some fields, adding some space back to the VdbeCursor object,

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Commits on Nov 20, 2013

• Reduce the size of the VdbeCursor object from 144 to 120 bytes.

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• Improved comments on the OP_Column changes. Optimize out loading of overflow

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• Further performance tweaks to OP_Column.

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• Refactoring the OP_Column opcode for improved performance and

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• Simplifications to the VdbeCursor object.

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• Performance improvement for the OP_MustBeInt opcode in the VDBE.

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Commits on Nov 19, 2013

• Fix a harmless MSVC compiler warning.

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• Minor performance improvement to sqlite3SerialTypeGet().

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• Change Noop-comments in where.c into Module-comments, so that they are

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• Avoid seeking on the main data table during the first loop of an UPDATE

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• Fix an requirement mark in a test script so that it matches the

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Commits on Nov 18, 2013

• Add comments identifing where the skip-scan option is decided in the

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• Fix documentation typos. No changes to code.

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• Fix harmless compiler warnings from clang scan-build.

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• Fix a problem with the shell tool EXPLAIN indentation code and VDBE sub-programs.

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• Enable the ONEPASS optimization for DELETE, for both rowid and WITHOUT

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Commits on Nov 17, 2013

• Make sure one-pass DELETE for WITHOUT ROWID tables correctly positions the

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Commits on Nov 16, 2013

• Fix a couple of minor problems with the new delete logic.

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• Fix an OOM-recovery problem in the DELETE code generator.

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• Combine the rowid and WITHOUT ROWID paths for DELETE into a single path.

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• The one-pass optimization is now working for DELETE on WITHOUT ROWID tables.

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• Enhance the DELETE logic so that it can make use of WHERE_ONEPASS_DESIRED

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• Fully constraint the ORDER BY on the top-10 line of the --summary output

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• Avoid unnecessary OP_IfNull checks when doing a range query where there

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• Simplification and performance improvement to the logic that factors

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• Fix testcase misc7-16 so that it works with the new UNIQUE constraint error

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Commits on Nov 15, 2013

• Add ALWAYS and NEVER macros to currently unreachable but important branches in

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• Merge the operator comment fixes from trunk.

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• Fix comments on the OP_Divide and OP_Remainder operators, especially the

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• Changes to make the new constant expression factoring logic more general

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• Add test cases for INSERT INTO ... DEFAULT VALUES on tables with numeric

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• Improvements to the Expr comparison routine to make it more general.

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• Add the --query option to the wordcount test program.

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