private String buildKey(List<Object> equalValList) {
        StringBuilder sb = new StringBuilder("");
        for (Object equalVal : equalValList) {
            sb.append(equalVal).append("_");
        }

        return sb.toString();
    }
@description:
@program: flink.sql
@author: lany
@create: 2021/01/11 14:53
elasticsearch7/elasticsearch7-side/elasticsearch7-all-side/src/main/java/com/dtstack/flink/sql/side/elasticsearch7/Elasticsearch7AllReqRow.java