Glossary

The following table shows a glossary of commonly-used terms:

Term

Description

Authentication

The process of verifying identity by validating a user or role identity using a username and password.

Authorization

Defines the set of actions that an authenticaed role can perform after gaining access to the system.

Catalog

A set of views containing metadata information about objects in a database.

Cluster

A SQream deployment containing several workers running on one or more nodes.

Metadata

SQream’s internal storage containing details about database objects.

Node

A machine used to run SQream workers.

Role

A group or a user.

Storage cluster

The directory where SQream stores data.

User-Defined Function

A feature that extends SQream’s built-in SQL functionality with user-written Python code.

Worker

A SQream application that responds to statements. Several workers running on one or more nodes form a cluster.