void purgeOrphanedArticles(){
  if (!isDBAvailable())   return;
  long time=System.currentTimeMillis();
  safelyDeleteArticles("feedId NOT IN (SELECT _id FROM " + TABLE_FEEDS + ")",null);
  Log.d(TAG,"purgeOrphanedArticles took " + (System.currentTimeMillis() - time) + "ms");
}

void purgeOrphanedArticles ( ) { if ( ! isDBAvailable ( ) ) return ; long time = System . currentTimeMillis ( ) ; safelyDeleteArticles ( "feedId NOT IN (SELECT _id FROM " + TABLE_FEEDS + ")" , null ) ; Log . d ( TAG , "purgeOrphanedArticles took " + ( System . currentTimeMillis ( ) - time ) + "ms" ) ; }
delete articles , which belongs to non - existent feeds
