TL;DR

This can be done by building a data pipeline manually, usually a Python script (you can leverage a tool as Apache Airflow for this). This process can take more than a full week of development. Or it can be done in minutes on Airbyte in three easy steps:

1. set up ClickHouse as a source connector (using Auth, or usually an API key)
2. set up Postgres destination as a destination connector
3. define which data you want to transfer and how frequently

You can choose to self-host the pipeline using Airbyte Open Source or have it managed for you with Airbyte Cloud.

This tutorial’s purpose is to show you how.

What is ClickHouse

What is Postgres destination

Prerequisites

1. A ClickHouse account to transfer your customer data automatically from.
2. A Postgres destination account.
3. An active Airbyte Cloud account, or you can also choose to use Airbyte Open Source locally. You can follow the instructions to set up Airbyte on your system using docker-compose.

Airbyte is an open-source data integration platform that consolidates and streamlines the process of extracting and loading data from multiple data sources to data warehouses. It offers pre-built connectors, including ClickHouse and Postgres destination, for seamless data migration.

When using Airbyte to move data from ClickHouse to Postgres destination, it extracts data from ClickHouse using the source connector, converts it into a format Postgres destination can ingest using the provided schema, and then loads it into Postgres destination via the destination connector. This allows businesses to leverage their ClickHouse data for advanced analytics and insights within Postgres destination, simplifying the ETL process and saving significant time and resources.

Step 1: Set up ClickHouse as a source connector

Step 2: Set up Postgres destination as a destination connector

Step 3: Set up a connection to sync your ClickHouse data to Postgres destination

Once you've successfully connected ClickHouse as a data source and Postgres destination as a destination in Airbyte, you can set up a data pipeline between them with the following steps:

1. Create a new connection: On the Airbyte dashboard, navigate to the 'Connections' tab and click the '+ New Connection' button.
2. Choose your source: Select ClickHouse from the dropdown list of your configured sources.
3. Select your destination: Choose Postgres destination from the dropdown list of your configured destinations.
4. Configure your sync: Define the frequency of your data syncs based on your business needs. Airbyte allows both manual and automatic scheduling for your data refreshes.
5. Select the data to sync: Choose the specific ClickHouse objects you want to import data from towards Postgres destination. You can sync all data or select specific tables and fields.
6. Select the sync mode for your streams: Choose between full refreshes or incremental syncs (with deduplication if you want), and this for all streams or at the stream level. Incremental is only available for streams that have a primary cursor.
7. Test your connection: Click the 'Test Connection' button to make sure that your setup works. If the connection test is successful, save your configuration.
8. Start the sync: If the test passes, click 'Set Up Connection'. Airbyte will start moving data from ClickHouse to Postgres destination according to your settings.

Remember, Airbyte keeps your data in sync at the frequency you determine, ensuring your Postgres destination data warehouse is always up-to-date with your ClickHouse data.

Use Cases to transfer your ClickHouse data to Postgres destination

Integrating data from ClickHouse to Postgres destination provides several benefits. Here are a few use cases:

1. Advanced Analytics: Postgres destination’s powerful data processing capabilities enable you to perform complex queries and data analysis on your ClickHouse data, extracting insights that wouldn't be possible within ClickHouse alone.
2. Data Consolidation: If you're using multiple other sources along with ClickHouse, syncing to Postgres destination allows you to centralize your data for a holistic view of your operations, and to set up a change data capture process so you never have any discrepancies in your data again.
3. Historical Data Analysis: ClickHouse has limits on historical data. Syncing data to Postgres destination allows for long-term data retention and analysis of historical trends over time.
4. Data Security and Compliance: Postgres destination provides robust data security features. Syncing ClickHouse data to Postgres destination ensures your data is secured and allows for advanced data governance and compliance management.
5. Scalability: Postgres destination can handle large volumes of data without affecting performance, providing an ideal solution for growing businesses with expanding ClickHouse data.
6. Data Science and Machine Learning: By having ClickHouse data in Postgres destination, you can apply machine learning models to your data for predictive analytics, customer segmentation, and more.
7. Reporting and Visualization: While ClickHouse provides reporting tools, data visualization tools like Tableau, PowerBI, Looker (Google Data Studio) can connect to Postgres destination, providing more advanced business intelligence options. If you have a ClickHouse table that needs to be converted to a Postgres destination table, Airbyte can do that automatically.

Wrapping Up

To summarize, this tutorial has shown you how to:

1. Configure a ClickHouse account as an Airbyte data source connector.
2. Configure Postgres destination as a data destination connector.
3. Create an Airbyte data pipeline that will automatically be moving data directly from ClickHouse to Postgres destination after you set a schedule