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Connect Elasticsearch and Clickhouse in our serverless environment

Use this template to Read rows from Elasticsearch table using them to insert rows into Clickhouse table.


Read rows from Elasticsearch table

Used integrations:
class ElasticsearchSourceSelect {
async init() {
// TODO: Create your clickhouse credential
// More info at
this.elasticsearch = yepcode.integration.elasticsearch(

async fetch(publish, done) {
// TODO: customize your query
const sql = "SELECT * FROM your_table_name";

const result = await this.elasticsearch.sql.query({
query: sql,
}); => {
const item = {};
for (let i = 0; i < row.length; i++) {
item[result.columns[i].name] = row[i];

async close() {}

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Insert rows into Clickhouse table

Used integrations:
class ClickhouseTargetInsert {
async init() {
// TODO: Create your clickhouse credential
// More info at
this.clickhouse = yepcode.integration.clickhouse(
// TODO: customize your sql query
// This opens insert stream for your table = new Stream.Readable({
objectMode: true
}); = client.insert({
table: "your_table_name",
values: stream,
format: "JSONCompactEachRow",

async consume(item) {
// TODO: Map your item to row;

async close() {
// wait stream to finish;
await this.clickhouse.close();

Other combinations

View recipes


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