[WIP]

include/medialibrary/IMediaLibrary.h

@@ -530,6 +530,7 @@ public:
     virtual bool removeExternalMedia( MediaPtr media ) = 0;
 
     virtual void removeThumbnails() = 0;
+    virtual void removeThumbnailsInDatabase() = 0;
 
     /**
      * @brief audioFiles Returns the media classified as Audio

src/MediaLibrary.cpp

@@ -647,6 +647,23 @@ void MediaLibrary::removeThumbnails()
     }
 }
 
+void MediaLibrary::removeThumbnailsInDatabase()
+{
+    pauseBackgroundOperations();
+    waitForBackgroundTasksIdle();
+
+    auto t = m_dbConnection->newTransaction();
+    sqlite::Statement::FlushStatementCache();
+    auto dbConn = m_dbConnection.get();
+    std::string req = "DELETE FROM ThumbnailLinking;";
+    sqlite::Tools::executeRequest( dbConn, req );
+    req = "DELETE FROM ThumbnailCleanup";
+    sqlite::Tools::executeRequest( dbConn, req );
+    req = "DELETE FROM Thumbnail";
+    sqlite::Tools::executeRequest( dbConn, req );
+    resumeBackgroundOperations();
+}
+
 InitializeResult MediaLibrary::initialize( IMediaLibraryCb* mlCallback )
 {
     assert( !m_dbPath.empty() );

src/MediaLibrary.h

@@ -340,6 +340,7 @@ private:
     bool checkDatabaseIntegrity();
     void registerEntityHooks();
     void removeThumbnails() override;
+    void removeThumbnailsInDatabase() override;
     void startThumbnailer() const;
 
 protected: