Here is a list of migrations I found:
Code:
11DbMigration
12DbMigrations
18ReaderDbMigrations
18SecureDbMigrations
2userPlatformMigrationDone()
2userPlatformMigrationProgress(int)
AddAbTests
AddAccessibilityState
AddAchievements
AddActivity
AddADEAnnotationXML
AddAdobeExpirationDate
AddAnalyticsEvents
AddAuthorTable
AddBookmarksTable
AddBookshelfTagsColumn
AddBTBFooterSection
AddCloudAnnotationsColumns
AddContentProperties
AddContentRatingCount
AddContentRenditionSpread
AddContentURL
AddCrowdCareMessageTable
AddCrowdCareReferenceColumn
AddDepth
AddDiscoverTitleAbTest
AddEbookLocation
AddEnglishJapaneseDict
AddEpubType
AddEventTable
AddFacebookAchievementInfo
AddFallback
AddFavouritesColumn
AddHideFromHomePage
AddImages
AddISBNColumn
AddIsHiddenColumn
AddIsSocialEnabled
AddKoboLove
AddLanguage
AddLastAccessedToShelf
AddMarketingMessageTable
AddMonetizationState
AddMultipleBookmarks
AddNewAbTestTable
AddNewAchievements
AddNewNederlandsDictionary
AddOverDriveCheckoutBook
AddPageProgressDirection
AddPocketFields
AddPortugueseDictionaries
AddProgressFields
AddPromoAbTest
AddPublishedToBookmarks
AddRatingsTable
AddRecommendationFeedback
AddRecommendationFeedbackSynced
AddReviewsSyncDate
AddReviewsTable
AddRussianDict
AddSelectedDictionary
AddSeriesIDNumberFloat
AddSeriesInfo
AddSocialChecksums
AddStackColumns
AddStackKeywordsTable
AddStackTable
AddTabTable
AddTestKey
AddTimeToWordList
AddTurkishDictionary
AddUserAuthToken
AddUserIdToBookmarks
AddUserProfileColumns
AddUserRefreshToken
AddWishlistColumn
AddWishlistedDateColumn
AddWordCount
AddWordListTable
AddWorkId
AddZoomFactor
BookShareSettings
BookShareSettings12shouldVacuumEv
bool migrate(const Device&, const QString&, int, bool*) [with Migrations = ReaderDbMigrations]
bool migrate(const Device&, const QString&, int, bool*) [with Migrations = SecureDbMigrations]
CastIDBlobToText
ChangeAchievementIds
ChangeUrlToHasUrl
CleanKeywordsAndStackTable
ClearBundledBookmark
ContentBookIDIndex
ContentBookIDIndex12shouldVacuumEv
CreatePublicationsAndContentKeys
CurrentChapterEstimate
DeleteNewspapers
DeleteObsoleteImages
DoNothing
DropIndices
DropIndices12shouldVacuumEv
DropMarketingMessageTable
EncryptDeviceIds
EncryptNickelDeviceIds
EventAppVersion
FixBrokenBookmarks
FixBrokenContentIds
FixBrokenContentIds7convertERK7QString
FixCurrentChapterProgress
FixEUPreviews
FixReadingLineHeightColumn
FNACContact
FullSyncUpdates
/home/build/n/Nickel/src/db/migrations/DbMigrations.cpp
InitialImport
LessContentTypes
LocalizedBundledContent
Migration: %1
MoveDictionaries
MoveFavouritesToShelf
NewShelves
NewSync
onUserPlatformMigrationProgress
OverDrive
OverDriveAndSyncUpdates
OverDriveLibrary
ParentTabID
PopulateKeywordsAndStackTable
RecentInBookSearches
RecreateRating
RemapNewsContentTypes
RemoveActivities
RemoveCrowdCareMessageTable
RemoveDyslexie
RemoveHelpAndWelcomeGuides
RemoveNewReleasesTile
RemoveStacks
RemoveTouchBoggleTile
RenameMessagingTable
renameSelectedFooterTab
ReparseEnglishHelpEpubs
ReparseLegalHelpEpub
ReplaceMorisawaFontsSettings
ResizeImage
ResizeImage10swapImagesERK7QStringS2
ResizeImage12migrateImageERK7QString
RestOfBookEstimate
SetDefaultReadStatus
SetPercentFields
SetUserID
ShelfPK
SMIL
Subscriptions
SwitchToUTC
SyncFixes
SyncQueue
UpdateDictionaries
UpdateJapaneseDictionaries
userPlatformMigrationDone
userPlatformMigrationProgress
UsersTable
WelcomeGuideEN
I found them with: strings libnickel.so.1.0.0|grep Migration|sed 's/D2Ev//g'|sed 's/D1Ev//g'|sed 's/D0Ev//g'|sort |uniq|cut -d_ -f3|sort|uniq|grep -v startVersion|grep -v endVersion|grep -v QSql