OpenMetadata/openmetadata-docs/content/v1.5.x/connectors/database/snowflake/index.md

title	slug
Snowflake	/connectors/database/snowflake

{% connectorDetailsHeader name="Snowflake" stage="PROD" platform="OpenMetadata" availableFeatures=["Metadata", "Query Usage", "Data Profiler", "Data Quality", "Lineage", "Column-level Lineage", "dbt", "Stored Procedures", "Tags"] unavailableFeatures=["Owners"] / %}

In this section, we provide guides and references to use the Snowflake connector.

Configure and schedule Snowflake metadata and profiler workflows from the OpenMetadata UI:

• Requirements
• Metadata Ingestion
  • Incremental Extraction
• Query Usage
• Data Profiler
• Data Quality
• Lineage
• dbt Integration

{% partial file="/v1.5/connectors/ingestion-modes-tiles.md" variables={yamlPath: "/connectors/database/snowflake/yaml"} /%}

Requirements

To ingest basic metadata snowflake user must have the following privileges:

• USAGE Privilege on Warehouse
• USAGE Privilege on Database
• USAGE Privilege on Schema
• SELECT Privilege on Tables

-- Create New Role
CREATE ROLE NEW_ROLE;

-- Create New User
CREATE USER NEW_USER DEFAULT_ROLE=NEW_ROLE PASSWORD='PASSWORD';

-- Grant role to user
GRANT ROLE NEW_ROLE TO USER NEW_USER;

-- Grant USAGE Privilege on Warehouse to New Role
GRANT USAGE ON WAREHOUSE WAREHOUSE_NAME TO ROLE NEW_ROLE;

-- Grant USAGE Privilege on Database to New Role
GRANT USAGE ON DATABASE TEST_DB TO ROLE NEW_ROLE;

-- Grant USAGE Privilege on required Schemas to New Role
GRANT USAGE ON SCHEMA TEST_SCHEMA TO ROLE NEW_ROLE;

-- Grant SELECT Privilege on required tables & views to New Role
GRANT SELECT ON ALL TABLES IN SCHEMA TEST_SCHEMA TO ROLE NEW_ROLE;
GRANT SELECT ON ALL EXTERNAL TABLES IN SCHEMA TEST_SCHEMA TO ROLE NEW_ROLE;
GRANT SELECT ON ALL VIEWS IN SCHEMA TEST_SCHEMA TO ROLE NEW_ROLE;
GRANT SELECT ON ALL DYNAMIC TABLES IN SCHEMA TEST_SCHEMA TO ROLE NEW_ROLE;

{% note %} If running any of:

• Incremental Extraction
• Ingesting Tags
• Usage Workflow

The following Grant is needed {% /note %}

• Incremental Extraction: Openmetadata fetches the information by querying snowflake.account_usage.tables.

• Ingesting Tags: Openmetadata fetches the information by querying snowflake.account_usage.tag_references.

• Usage Workflow: Openmetadata fetches the query logs by querying snowflake.account_usage.query_history table. For this the snowflake user should be granted the ACCOUNTADMIN role or a role granted IMPORTED PRIVILEGES on the database SNOWFLAKE.

In order to be able to query those tables, the user should be either granted the ACCOUNTADMIN role or a role with the IMPORTED PRIVILEGES grant on the SNOWFLAKE database:

-- Grant IMPORTED PRIVILEGES on all Schemas of SNOWFLAKE DB to New Role
GRANT IMPORTED PRIVILEGES ON ALL SCHEMAS IN DATABASE SNOWFLAKE TO ROLE NEW_ROLE;

You can find more information about the account_usage schema here.

Regarding Stored Procedures:

1. Snowflake only allows the grant of USAGE or OWNERSHIP
2. A user can only see the definition of the procedure in 2 situations:
   1. If it has the OWNERSHIP grant,
   2. If it has the USAGE grant and the procedure is created with EXECUTE AS CALLER.

Make sure to add the GRANT <USAGE|OWNERSHIP> ON PROCEDURE <NAME>(<SIGNATURE>) to NEW_ROLE, e.g., GRANT USAGE ON PROCEDURE CLEAN_DATA(varchar, varchar) to NEW_ROLE.

Metadata Ingestion

{% partial file="/v1.5/connectors/metadata-ingestion-ui.md" variables={ connector: "Snowflake", selectServicePath: "/images/v1.5/connectors/snowflake/select-service.png", addNewServicePath: "/images/v1.5/connectors/snowflake/add-new-service.png", serviceConnectionPath: "/images/v1.5/connectors/snowflake/service-connection.png", } /%}

{% stepsContainer %} {% extraContent parentTagName="stepsContainer" %}

Connection Details

• Username: Specify the User to connect to Snowflake. It should have enough privileges to read all the metadata.
• Password: Password to connect to Snowflake.
• Account: Snowflake account identifier uniquely identifies a Snowflake account within your organization, as well as throughout the global network of Snowflake-supported cloud platforms and cloud regions. If the Snowflake URL is https://xyz1234.us-east-1.gcp.snowflakecomputing.com, then the account is xyz1234.us-east-1.gcp.
• Role (Optional): You can specify the role of user that you would like to ingest with, if no role is specified the default roles assigned to user will be selected.
• Warehouse: Snowflake warehouse is required for executing queries to fetch the metadata. Enter the name of warehouse against which you would like to execute these queries.
• Database (Optional): The database of the data source is an optional parameter, if you would like to restrict the metadata reading to a single database. If left blank, OpenMetadata ingestion attempts to scan all the databases.
• Private Key (Optional): If you have configured the key pair authentication for the given user you will have to pass the private key associated with the user in this field. You can checkout this doc to get more details about key-pair authentication.
  • The multi-line key needs to be converted to one line with \n for line endings i.e. -----BEGIN ENCRYPTED PRIVATE KEY-----\nMII...\n...\n-----END ENCRYPTED PRIVATE KEY-----
• Snowflake Passphrase Key (Optional): If you have configured the encrypted key pair authentication for the given user you will have to pass the paraphrase associated with the private key in this field. You can checkout this doc to get more details about key-pair authentication.
• Include Temporary and Transient Tables: Optional configuration for ingestion of TRANSIENT and TEMPORARY tables, By default, it will skip the TRANSIENT and TEMPORARY tables.
• Client Session Keep Alive: Optional Configuration to keep the session active in case the ingestion job runs for longer duration.

{% partial file="/v1.5/connectors/database/advanced-configuration.md" /%}

{% /extraContent %}

{% partial file="/v1.5/connectors/test-connection.md" /%}

{% partial file="/v1.5/connectors/database/configure-ingestion.md" /%}

{% partial file="/v1.5/connectors/ingestion-schedule-and-deploy.md" /%}

{% /stepsContainer %}

{% partial file="/v1.5/connectors/troubleshooting.md" /%}

Incomplete Column Level for Views

For views with a tag or policy, you may see incorrect lineage, this can be because user may not have enough access to fetch those policies or tags. You need to grant the following privileges in order to fix it. checkout snowflake docs for further details.

GRANT APPLY MASKING POLICY TO ROLE NEW_ROLE;
GRANT APPLY ROW ACCESS POLICY TO ROLE NEW_ROLE;
GRANT APPLY AGGREGATION POLICY TO ROLE NEW_ROLE;
GRANT APPLY PROJECTION POLICY TO ROLE NEW_ROLE;
GRANT APPLY TAG TO ROLE NEW_ROLE;

Depending on your view ddl you can grant the relevant privileged as per above queries.

{% partial file="/v1.5/connectors/database/related.md" /%}