this.context = context;
this.datas = datas;
this.canBatch = canBatch;
EventData data = datas.get(0); // eventData为同一数据库的记录，只取第一条即可
DataMedia dataMedia = ConfigHelper.findDataMedia(context.getPipeline(), data.getTableId());
dbDialect = dbDialectFactory.getDbDialect(context.getIdentity().getPipelineId(),
(DbMediaSource) dataMedia.getSource());
}