@Override
    public String[] getFieldNames() {
        return fieldNames;
    }
table output elastic5plugin
Date: 2018/7/13
Company: www.dtstack.com
@author huyifan_zju@163.com
elasticsearch5-xh/elasticsearch5-xh-sink/src/main/java/com/dtstack/flink/sql/sink/elasticsearch/ElasticsearchSink.java