How to load data from RSS to Clickhouse

First, ensure that you have a server or local machine where you can run scripts. Install Python as it will be used to parse the RSS feed and transfer data to ClickHouse. Ensure you have network access to your ClickHouse server.

Install necessary Python libraries for RSS parsing and database interaction. Use:
```bash
pip install feedparser clickhouse-driver
```
`feedparser` will help in parsing RSS feeds, and `clickhouse-driver` will allow interaction with the ClickHouse database.

Write a Python script to fetch and parse the RSS feed. Use `feedparser` to parse the feed and extract data items.
```python
import feedparser

rss_url = 'http://example.com/rss'
feed = feedparser.parse(rss_url)
for entry in feed.entries:
# Access data like entry.title, entry.link, entry.published, etc.
print(entry.title, entry.link)
```

Ensure that your ClickHouse database is set up to receive the data. Define a table schema that matches the structure of the RSS feed data.
```sql
CREATE TABLE rss_data (
title String,
link String,
published DateTime DEFAULT now()
) ENGINE = MergeTree()
ORDER BY published;
```

Establish a connection to your ClickHouse server using the `clickhouse-driver` library.
```python
from clickhouse_driver import Client

client = Client('localhost') # Replace 'localhost' with your ClickHouse server address
```

Iterate over the parsed RSS feed entries and insert them into the ClickHouse table. Use a loop to process each entry.
```python
data = [(entry.title, entry.link, entry.published_parsed) for entry in feed.entries]
client.execute('INSERT INTO rss_data (title, link, published) VALUES', data)
```

To ensure the RSS feed data is continuously updated in the ClickHouse warehouse, automate the script execution using cron jobs (Linux/Mac) or Task Scheduler (Windows). Create a cron job to run the script at desired intervals.
```bash
crontab -e
# Add a line like the following to run the script every hour
0 /usr/bin/python3 /path/to/your/script.py
```

By following these steps, you can successfully move data from an RSS feed to a ClickHouse data warehouse without relying on third-party connectors or integrations.