Documentation

While configuring your ClickHouse connection, you may encounter several issues. Understanding these common errors can help streamline the setup process and facilitate quick resolutions.

Wrong input data

• wrong user
• wrong password
• whitelist issue
• wrong database name
• wrong host (invalid)
• wrong host (valid)
• wrong port, wrong interface

Error messages:

General solution

Authentication Check:

• Confirm the username and password for the Clickhouse database are entered correctly.

Permission Verification:

• Ensure the user has the required permissions as per Clickhouse documentation, which includes SELECT, CREATE TABLE, INSERT, and ALTER operations.

Whitelist IP Addresses:

• If applicable, whitelist the IP addresses in Clickhouse configuration to allow connections and select "Use static IP = YES" if required in connection parameters.

Database Confirmation:

• Verify that the database "your_db_name" exists in Clickhouse.

Server Connection:

• Check the host, port, and interface details for accuracy, especially if Clickhouse is behind a firewall.

Refer to the documentation if necessary.

Wrong permissions

Error message:

Solution

Grant Permissions:

• Grant the necessary permissions, which includes ```SELECT```, ```CREATE TABLE```, ```INSERT```, and ```ALTER```.

Update Configuration:

• If necessary, update the Clickhouse server settings to reflect the changes in permissions.

Test Access:

• Verify the permissions by attempting to perform operations that were previously unauthorized

‍