Understanding BigQuery’s Multi-Region Support and Handling the “Procedure Not Found” Error

Table of Contents

1. Introduction to BigQuery
2. What is a Scheduled Query in BigQuery?
3. The Challenge of Scheduling Queries Across Multiple Regions
4. Why Does the “Procedure Not Found” Error Occur?
5. Resolving the “Procedure Not Found” Error: Single Region vs. Multi-Region Support

Introduction to BigQuery

BigQuery is a fully-managed enterprise data warehouse service offered by Google Cloud Platform (GCP). It provides scalable and cost-effective data storage and processing capabilities for businesses of all sizes. One of the key features of BigQuery is its ability to handle large datasets and perform complex queries.

BigQuery’s Architecture

BigQuery is built on top of several components:

• Data Ingestion: Data from various sources (e.g., Google Drive, Google Cloud Storage) is ingested into BigQuery.
• Data Processing: Once data is ingested, it can be processed using SQL-like queries or custom Python scripts.
• Storage: The processed data is stored in BigQuery’s optimized storage format.

BigQuery’s Regions

BigQuery operates across multiple regions. Each region provides its own set of resources and is managed independently. This allows for better performance, latency, and regional compliance for specific use cases.

What is a Scheduled Query in BigQuery?

A scheduled query is a type of query that can be run automatically at specified intervals. These queries are useful for tasks such as:

• Data backups
• Daily/Weekly/monthly reports
• Automatic data loading into other tools

Creating a Scheduled Query

To create a scheduled query, you will need to follow these steps:

1. Connect to your BigQuery account.
2. Create a new SQL query or use an existing one.
3. Click on the Schedule button next to the query editor.

The Challenge of Scheduling Queries Across Multiple Regions

When scheduling queries across multiple regions, things can get complicated. Each region has its own set of rules and constraints when it comes to querying data.

BigQuery’s Multi-Region Support

BigQuery supports multi-region scheduling, which allows you to schedule your query on a specific region. However, this requires careful planning and consideration:

• Single Region vs. Multi-Region: As we will discuss later, single regions provide better performance than multi-regions.
• Query Complexity: Queries that involve multiple tables or complex joins might not work across multiple regions.

Why Does the “Procedure Not Found” Error Occur?

The “Procedure not found” error occurs when BigQuery can’t find a procedure (a custom function) in your query. In this specific case, it seems to be happening because you’re scheduling your query on a multi-region basis.

What is a Procedure?

In BigQuery, procedures are reusable blocks of SQL code that contain logic for performing complex tasks. They can be used within queries or as part of a separate script.

Resolving the “Procedure Not Found” Error: Single Region vs. Multi-Region Support

To resolve the “procedure not found” error, you need to consider using single regions instead of multi-regions. Here’s why:

Why Use Single Regions?

Single regions provide better performance and are easier to manage than multi-regions:

• Performance: Queries run faster in a single region.
• Management: You only have to worry about one set of rules and constraints.

However, there might be cases where you need to use multiple regions:

Why Use Multi-Regions?

Multi-regions allow for regional compliance and better performance for certain use cases:

• Regional Compliance: By scheduling your query on a specific region, you can ensure that it complies with the relevant data protection regulations.
• Better Performance: If you have users spread across multiple regions, using single regions might result in slower query times.

What’s the Difference Between Single and Multi-Regions?

Here are some key differences between single and multi-regions:

Conclusion

In this article, we explored the challenges of scheduling queries across multiple regions in BigQuery. We discussed why the “procedure not found” error occurs and how single regions can provide better performance and management for your queries.

Best Practices

To avoid issues with procedure not found errors:

• Use single regions whenever possible.
• Consider using custom Python scripts to handle complex queries that might not work across multiple regions.
• Be sure to follow best practices when scheduling your query, including specifying the correct region and ensuring proper authentication.

Last modified on 2023-09-08