[Kde-pim] Review Request 111619: Minimize queried data in the FETCH handler

[Volker Krause]

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http://git.reviewboard.kde.org/r/111619/
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Review request for Akonadi and Dan Vrátil.


Description
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We were querying a bunch of columns that were either never used, or only used with specific command options. Now we are only querying what is actually used.


Git Log:


Remove to unused JOINs.

Speeds up FETCH by another ~10%.


Only query columns we are actually going to use.

Speeds up the KMail folder listing test case by about 10-20%.


Add item query column mapping.


Factor out item query result extraction.

This prepares a more sophisticated column selection in the query, to avoid
loading data we don't need at all.


Diffs
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  server/src/handler/fetchhelper.h 4ad00f9e9f16ddbbfcca94998a533f27046748cc 
  server/src/handler/fetchhelper.cpp 85227cba584c1f8640588fc0d4575a6066a8167c 

Diff: http://git.reviewboard.kde.org/r/111619/diff/


Testing
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unit tests, using KMail

also testing the post-review command :)


Thanks,

Volker Krause

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