Difference between revisions of "Projects/PIM/MS Windows/SQLite Folder Indices"

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==Introduction==
 
==Introduction==
 
*we call the new implementation '''SQLite mode''' for short
 
*we call the new implementation '''SQLite mode''' for short
 +
*SQLite 3.5.4 is used, as provided by emerge sqlite module; we should not allow using much older versions of sqlite, e.g. 3.1 because of format differences
 
*kmfolderindex_sqlite.cpp is created and edited as a copy of kmfolderindex.cpp; kmfolderindex.cpp is not compiled in SQLite mode
 
*kmfolderindex_sqlite.cpp is created and edited as a copy of kmfolderindex.cpp; kmfolderindex.cpp is not compiled in SQLite mode
 
*kmfolderindex.h is a common header for both kmfolderindex*.cpp implementations
 
*kmfolderindex.h is a common header for both kmfolderindex*.cpp implementations

Revision as of 10:46, 23 April 2008

There are issues with locking index files for KMail folders and mmap()/munmap() operations on Windows. Therefore, SQLite-based indices are in development. This page presents detailed development notes for this task.

Started: jstaniek 11:35, 23 April 2008 (CEST)

Contents


Introduction

  • we call the new implementation SQLite mode for short
  • SQLite 3.5.4 is used, as provided by emerge sqlite module; we should not allow using much older versions of sqlite, e.g. 3.1 because of format differences
  • kmfolderindex_sqlite.cpp is created and edited as a copy of kmfolderindex.cpp; kmfolderindex.cpp is not compiled in SQLite mode
  • kmfolderindex.h is a common header for both kmfolderindex*.cpp implementations
  • kmailprivate links to sqlite library, and KMAIL_SQLITE_INDEX is defined to enable #ifdef'd code

KMFolderIndex

api docs

  • 2008-04-23
    • mIndexId unused - removed as well as serialIndexId()
    • indexLocation(): added .db suffix to indicate the index is sqlite-based
    • INDEX_VERSION is written and checked using 'PRAGMA user_version = <integer>' command [1]
    • we do not use temporary filenames, e.g. in writeIndex(): SQLite takes care about safe storage
    • updateIndex() no changes, we're changing implementation of KMMsgBase::syncIndexString() and writeIndex() instead

KMMsgBase

api docs

  • 2008-04-23
    • move syncIndexString() to KMFolderIndex, where we can impleemnt it for SQLite differently

Status of porting to SQLite

TOPIC PORTED TESTED NOTES
KMFolderIndex:indexLocation() yes added .db suffix to indicate the index is sqlite-based

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