Assume that the users table that we created earlier, we intend to restore the same table from the snapshot in the AWS Redshift cluster, where the user table already exists. The query suggested by @j_c -- to query information_schema instead does work. Select: Allows user to read data using SELECTstatement 2. Amazon Redshift allows many types of permissions. Any query that users submit to Amazon Redshift is a user query. For example, I created my own schema and created a table in that schema, and the pg_table_def table doesn't have any information about that table. All Redshift system tables are prefixed with stl_, stv_, svl_, or svv_. With Spectrum, AWS announced that Redshift users would have the ability to run SQL queries against exabytes of unstructured data stored in S3, as though they were Redshift tables. Using CTEs usually result in a more readable and maintainable query versus using subqueries. To create a schema in your existing database run the below SQL and replace 1. my_schema_namewith your schema name If you need to adjust the ownership of the schema to another user - such as a specific db admin user run the below SQL and replace 1. my_schema_namewith your schema name 2. my_user_namewith the name of the user that needs access Create: Allows users to create objects within a schema using CREATEstatement Table level permissions 1. So, if we we want to give this user access to tables created later on, we need to alter the default privileges on that schema and grant SELECT permission. Amazon Redshift allows users to create temporary tables by making use of the temp or temporary keyword while creating new tables for their Amazon Redshift instance. The above permissions will only apply to existing tables. To view assigned roles to users in your Redshift cluster, you can use the following command: SELECT usename AS user_name, groname AS group_name FROM pg_user, pg_group WHERE pg_user.usesysid = ANY(pg_group.grolist) AND pg_group.groname in (SELECT DISTINCT pg_group.groname from pg_group); Database user accounts are global across all the databases in a cluster; they do not belong to individual databases. Upon clicking, a new wizard would appear as shown below. Below is the right way to create read only users in Amazon Redshift. Restrict Amazon Redshift Spectrum external table access to Amazon Redshift IAM users and groups using role chaining Published by Alexa on July 6, 2020 With Amazon Redshift Spectrum, you can query the data in your Amazon Simple Storage Service (Amazon S3) data lake using a central AWS Glue metastore from your Amazon Redshift cluster. https://dataedo.com/kb/query/amazon-redshift/list-users-in-database In addition, Redshift users could run SQL queries that spanned both data stored in your Redshift cluster and data stored more cost-effectively in S3. For these reasons, many Redshift users have chosen to use the new materialized views feature to optimize Redshift view performance. GRANT SELECT ON ALL TABLES IN SCHEMA "ro_schema" TO GROUP ro_group; Alter Default Privileges to maintain the permissions on new tables. This is because Redshift is based off Postgres, so that little prefix is a throwback to Redshift’s Postgres origins. 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