Book Image

Snowflake Cookbook

By : Hamid Mahmood Qureshi, Hammad Sharif
5 (1)
Book Image

Snowflake Cookbook

5 (1)
By: Hamid Mahmood Qureshi, Hammad Sharif

Overview of this book

Snowflake is a unique cloud-based data warehousing platform built from scratch to perform data management on the cloud. This book introduces you to Snowflake's unique architecture, which places it at the forefront of cloud data warehouses. You'll explore the compute model available with Snowflake, and find out how Snowflake allows extensive scaling through the virtual warehouses. You will then learn how to configure a virtual warehouse for optimizing cost and performance. Moving on, you'll get to grips with the data ecosystem and discover how Snowflake integrates with other technologies for staging and loading data. As you progress through the chapters, you will leverage Snowflake's capabilities to process a series of SQL statements using tasks to build data pipelines and find out how you can create modern data solutions and pipelines designed to provide high performance and scalability. You will also get to grips with creating role hierarchies, adding custom roles, and setting default roles for users before covering advanced topics such as data sharing, cloning, and performance optimization. By the end of this Snowflake book, you will be well-versed in Snowflake's architecture for building modern analytical solutions and understand best practices for solving commonly faced problems using practical recipes.
Table of Contents (12 chapters)

Querying and viewing the task history

In this recipe, we will explore techniques that can be used to view the history of task execution, using the TASK_HISTORY table function.

Getting ready

The following steps describe the various ways to view and analyze the history of the execution of a single task as well as a series of tasks. Note that these steps can be run either in the Snowflake web UI or the SnowSQL command-line client.

To proceed with this recipe, ensure that you have already created and executed a few tasks; otherwise, no results will be returned.

How to do it…

To perform this recipe, let's try out the following steps:

  1. We will use the task_history table function, which can be used to query the history of task execution. The function takes several parameters but all of them are optional, so to start with, we will run a query without any parameters. This will return the execution history of all the tasks:
    SELECT * FROM TABLE(information_schema...