ClickHouse

ClickHouse is a fast, column-oriented database management system that is designed for online analytical processing (OLAP) workloads. It is an open-source project that was created by Yandex, the Russian search engine company. ClickHouse is known for its ability to process large amounts of data quickly and efficiently, making it an ideal solution for big data analytics.

With Illa Cloud, you can deploy and manage ClickHouse clusters on the cloud, without having to worry about the underlying infrastructure and maintenance.

Illa Cloud provides a web-based interface for managing ClickHouse clusters, allowing you to monitor cluster performance, scale resources up or down, and configure backups and security settings. You can also use Illa Cloud to run queries on your ClickHouse data using a web-based query editor.

Create ClickHouse

There are two ways to create a resource in Illa after signing into your Illa account.

• Create in Resources

Sign into your Illa account, select **Resources** on the top of the page, and click **Create New** button.

Select ClickHouse from the database list.

Connect to the database with the required parameters described in Connection Settings below.

Click **Test Connection** to see if we can successfully connect to the database. If yes, click Save Resources, else, double check the hostname, port, username, and password is correct.

After creating a resource, the ready ClickHouse will display as shown.

• Create in Builder

Sign into your Illa account, create a project in Illa Builder in the **App** page, and navigate to the Action List at the bottom of the page. Click **new**, then select ClickHouse from the database list. Then, connect to the database with required parameters described in Connection Settings below.

Click **Test Connection** to see if we can successfully connect to the database. If yes, click Save Resources, else, double check the hostname, port, username, and password is correct.

Connection Settings

Here we need to provide information for connecting to ClickHouse database.

Properties	Required	Description
Name	required	The name for resource when creating actions in the ILLA.
Hostname	required	The URL or IP address for your database
Port	required	The server host's port number that you should use to connect. If you don't specify a port, default port is '9440'.
Database	required	The name of the database
Username	required	the username you wish to use when logging in to the ClickHouse server.
Password	required	Use this password for authentication.
SSL options	optional	decides how high a secure SSL TCP/IP connection is prioritized while negotiating with the server.

Create Actions

We have created a ClickHouse resource, we can add the action by selecting ClickHouse from action list and choosing the Create action button.

Now we have added the ClickHouse server as an action to our building page.

Configure ClickHouse

Properties	Description
SQL query	sql commands to fetch (select), insert, update, delete data from database
Transformer	transforming data into the style you like using JavaScript

Example usage:

• Select

SELECT * FROM users ORDER BY lastname;

• Insert

INSERT INTO users

    (firstname, lastname, email)

VALUES

    (

        {{ NewUser.data.firstNameInput }},

        {{ NewUser.data.lastNameInput }},

        {{ NewUser.data.emailInput }}

    );

• Update

UPDATE users
  SET firstname = '{{form1.updatedProfile.first}}'
  WHERE id = {{ form1.updatedProfile.uid}};

• Delete

DELETE FROM users WHERE id = {{ form1.updatedProfile.uid }};