code: function readMessageInChunksFromOutbox(message_hash, len, handleMessage){
  	var CHUNK_LEN = 1000000;
  	var start = 1;
  	var message = '';
  	function readChunk(){
  		db.query("SELECT SUBSTR(message, ?, ?) AS chunk FROM outbox WHERE message_hash=?", [start, CHUNK_LEN, message_hash], function(rows){
  			if (rows.length === 0)
  				return handleMessage();
  			if (rows.length > 1)
  				throw Error(rows.length+' msgs by hash in outbox, start='+start+', length='+len);
  			message += rows[0].chunk;
  			start += CHUNK_LEN;
  			(start > len) ? handleMessage(message) : readChunk();
  		});
  	}
  	readChunk();
  }
docs: a hack to read large text from cordova sqlite