Category: Unity Catalog

This post is basic commands you will need to know for working with Unity Catalog.

Display Current Metastore

SELECT CURRENT_METASTORE();

Display Current Catalog

SELECT CURRENT_CATALOG();

Create Catalog

CREATE CATALOG IF NOT EXISTS  <Catalog_Name> COMMENT 'A COMMENT';

Create Catalog With Location

CREATE CATALOG IF NOT EXISTS <Catalog_Name> MANAGED LOCATION 'abfss://<METASTORE_CONTAINER_NAME>@<STORAGE_ACCOUNT>.dfs.core.windows.net/<CATALOG_NAME>' COMMENT 'A COMMENT';

Describe Catalog

DESCRIBE CATALOG <Catalog_Name>;

Create Schema

CREATE SCHEMA IF NOT EXISTS <SCHEMA_NAME> COMMENT '<COMMENT>';

Create Schema With Location

CREATE SCHEMA IF NOT EXISTS <SCHEMA_NAME> MANAGED LOCATION 'abfss://<METASTORE_CONTAINER_NAME>@<STORAGE_ACCOUNT>.dfs.core.windows.net/<CATALOG_NAME>/<SCHEMA_NAME>' COMMENT '<COMMENT>';

Show All Storage Credentials

SHOW STORAGE CREDENTIALS;

Describe Credential

DESCRIBE STORAGE CREDENTIAL <CREDENTIAL_NAME>;

Create External Location

You will first need a storage credential.

You can reference down to the full table path or keep it at the container

CREATE EXTERNAL LOCATION IF NOT EXISTS <NAME>
URL 'abfss://<COTNAINER>@<STORAGE_ACCOUNT>.dfs.core.windows.net/'
WITH (STORAGE CREDENTIAL <CREDENTIAL_NAME>)
COMMENT '<COMMENT>';

Create External Table

CREATE TABLE <CATALOG_NAME>.<SCHEMA_NAME>.<TABLE_NAME>
USING <FORMAT>
LOCATION 'abfss://<COTNAINER>@<STORAGE_ACCOUNT>.dfs.core.windows.net/FOLDER/PATH;'

Grant Create Storage Credential on Metastore

GRANT CREATE STORAGE CREDENTIAL ON METASTORE TO `<USER>`;

Grant Permission to Create External Locations on Storage Credential

GRANT CREATE EXTERNAL LOCATION ON STORAGE CREDENTIAL <CREDENTIAL_NAME> TO `<USER>`;

Grant Permission to Create External Location On Metastored

GRANT CREATE EXTERNAL LOCATION ON METASTORE TO `<USER>`;

Grant Permission to Use Catalog

GRANT USE_CATALOG ON CATALOG <CATALOG_NAME> TO `<USER>`;

Show all Grants On Metastore

SHOW GRANTS `<USER>` ON METASTORE;

Grant Permission to Use Schema

GRANT USE_SCHEMA ON SCHEMA <CATALOG_NAME>.<SCHEMA_NAME> TO `<USER>`;

Grant Permission to Create Table

GRANT CREATE TABLE ON SCHEMA <CATALOG_NAME>.<SCHEMA_NAME> TO <USER>;