Hive

The Hive connector enables querying data housed within an Apache Hive data warehouse. Hive comprises three primary components: data files, often stored in diverse formats commonly housed in the Hadoop Distributed File System, or object storage systems like Amazon S3.

The connectivity to Hive Connector is via JDBC driver, which is included in the platform.

Connector Capabilities

The connector capabilities are shown below:

Crawling

Profiling

Lineage Building

Querying

Prerequisites

The following are prerequisites for connecting to the Hive Connector:

Drivers

Configuring Environment Variables

Configuring environment names enables you to select the appropriate environment from the drop-down list when adding a connector. This allows for consistent crawling of schemas across different environments, such as production (PROD), staging (STG), or temporary environments. It also facilitates schema comparisons and assists in application upgrades by providing a temporary environment that can later be deleted.

Before establishing a connection, it is important to configure the environment names for the specific connector. If your environments have been configured, skip this step.

Steps to Configure the Environment

1. Log into the OvalEdge application.
2. Navigate to Administration >  System Settings.
3. Select the Connector tab.
4. Find the key name “connector.environment”.
   
   
5. Enter the desired environment values (PROD, STG) in the Value column.
6. Click ✔ to Save.

Service Account Permissions

A service account is required for crawling and profiling. By default, the service account provided for the connector will be used for any query operations. If the service account has a write privilege, insert, update, and delete queries can be executed. The minimum privileges required are listed below.

Establish a Connection

To connect to Hive using the OvalEdge application, complete the following steps:

1. Log in to the OvalEdge application.
2. Navigate to Administration >  Connectors.
3. Click on the + (New Connector) icon.
   
   
4. The Add Connector pop-up window is displayed, and you can search for the Hive connector.
   
5. The Add Connector with Connector Type specific details pop-up window is displayed. Enter the relevant information to configure the Hive connection.
   

   Note: An asterisk (*) denotes a mandatory field for establishing a connection.

   Hive (Non-Kerberos Authentication)

   Field Name		Description
   Connector Type		This field allows you to select the connector from the drop-down list provided. By default, 'Hive' is displayed as the selected connector type.
   Credential Manager*		Select the option from the drop-down menu where you want to save your credentials: OE Credential Manager: The Hive connection is configured with the basic Username and Password of the service account in real-time when OvalEdge establishes a connection to the Hive database. Users must manually add the credentials if the OE Credential Manager option is selected. HashiCorp: The credentials are stored in the HashiCorp database server and fetched from HashiCorp to OvalEdge.   AWS Secrets Manager: The credentials are stored in the AWS Secrets Manager database server and fetched from the AWS Secrets Manager to OvalEdge. For more information on Azure Key Vault, refer to Azure Key Vault. For more information on Credential Manager, refer to Credential Manager.
   License Add Ons		All the connectors will have a Base Connector License by default, which allows you to crawl and profile to obtain metadata and statistical information from a data source.  OvalEdge supports various License Add-Ons based on the connector’s functionality requirements. Select the Auto Lineage Add-On license that enables the automatic construction of the Lineage of data objects for a connector with the Lineage feature.  Select the Data Quality Add-On license to identify, report, and resolve the data quality issues for a connector whose data supports data quality using DQ Rules/functions, Anomaly detection, Reports, and more.
   Connector Name*		The connection name refers to the Hive database connection in the OvalEdge application.
   Connector Environment		The Connector Environment drop-down list allows you to select the environment configured for the connector from the drop-down list.  For example, you can select PROD or STG (based on the items configured in the OvalEdge configuration for the connector environment). The purpose of the environment field is to help you identify which connector is connecting what type of system environment (Production, STG, or QA).    Note: The Configuring Environment Variables section explains setting up environment variables.
   Server*		Hive Plugin Server is a mediator project between OvalEdge and Hive Server for communication. OvalEdge uses Hive Plugin APIs to communicate with the Hive server.
   Port*		It is a TCP/IP port to use if the server is not localhost.  Port of .NET application (i.e swagger)
   Database*		IP address of Hive Server
   Driver*		JSON file path and the file extension should be .asdatabase
   Username*		Enter the server name if you are running this as a plugin.
   Password*		The port number on which the plugin is running.
   Connection String		Ex: jdbc:hive2://18.x20.1x4.2xx:10xx0/default;principal=hive/ec2-18-2x0-1x4-2x9.us-east-2.compute.amazonaws.com@US-EAST-2.COMPUTE.INTERNAL
   Default Governance Roles
   Steward*		Select the Steward from the drop-down list options.
   Custodian*		Select the Custodian from the drop-down list options.
   Owner*		Select the Owner from the drop-down list options.
   Governance Roles 4, 5, 6*		Select the respective user from the drop-down options. Note: The drop-down list displays all the configurable roles (single user or a team) as per the configurations made in the OvalEdge Security > Governance Roles section.
   Admin Roles
   Integration Admins*		To add Integration Admin Roles, search for or select one or more roles from the Integration Admin options, then click the Apply button. The Integration Admin's responsibilities include configuring crawling and profiling settings for the connector and deleting connectors, schemas, or data objects.
   Security and Governance Admins*		To add Security and Governance Admin roles, search for or select one or more roles from the list and then click on the Apply button. The Security and Governance Admin is responsible for: Configuring role permissions for the connector and its associated data objects. Adding admins to set permissions for the connector's roles and associated data objects. Updating governance roles. Creating custom fields. Developing Service Request templates for the connector. Creating approval workflows for  Service Request templates.
   No. of Archive Objects*		The number of archive objects indicates the number of recent metadata modifications made to a dataset at a remote/source location. By default, the archive objects feature is deactivated. However, users may enable it by clicking the Archive toggle button and specifying the number of objects they wish to archive.
   Select Bridge		With the OvalEdge Bridge component, any cloud-hosted server can connect with any on-premise or public cloud data source(s) without modifying firewall rules. A bridge provides real-time control, making data movement between source and destination easy. For more information, refer to Bridge Overview.

   Hive (Kerberos Authentication)

   Field Name		Description
   Principal		A Principal is a unique identity. It can be a user or a service.  Ex: host/corp.example.com@CORP.EXAMPLE.COM
   Keytab		Keytab is a file that contains key value pair, where key is the principle and value is a encrypted value of Kerberos principal.
   Kbr5-Configuration File*		This file contains the Kerberos configuration information.

6. After entering all the required connection details, select the appropriate option based on your preferences: 
   
   1. Validate: Click the Validate button to verify the connection details. This ensures that the provided information is accurate and enables successful connection establishment.
   2. Save: Click on the Save button to store the connection details. Once saved, the connection will be added to the Connectors home page for easy access.
   3. Save & Configure: For certain Connectors requiring additional configuration settings, click the Save & Configure button. This will open the Connection Settings pop-up window, allowing you to configure the necessary settings before saving the connection.
7. Once the connection is validated and saved, it will be displayed on the Connectors home page.

Connection Validation Details

Note: If you have issues creating a connection, please contact your assigned OvalEdge Customer Success Management (CSM) team.

Connector Settings

Once the connection is successfully established, various settings are provided to fetch and analyze the information from the data source.

The connection settings include Crawler, Profiler, Query Policies, Access Instruction, Business Glossary Settings, and Notification.

To view the Connector Settings page,

1. Go to the Connectors page.
2. From the 9- dots, select the Settings option.
   
3. This will display the Connector Settings page, where you can view all the connector settings.
   
   
4. When you have finished making your desired changes, click on Save Changes. All setting changes will be applied to the metadata.

The following is a list of connection settings and their corresponding descriptions.

Note: For more information, refer to the Connector Settings.

Crawling of Schema(s)

The Crawl/Profile option allows you to select the schema for the following operations:      

Crawl, Crawl & Profile, Profile, or Profile Unprofiled. Under the Action section, the defined run date and time are displayed for any scheduled crawlers and profilers.

1. Navigate to the Connectors page and click on the Crawl/Profile button. Select Important Schema For Crawling and Profiling pop-up window is displayed.
2. Select the schema.
3. The list of actions below is displayed in the Action section.
   1. Crawl:  This allows the selected schema(s) metadata to be crawled.
   2. Crawl & Profile: This allows the metadata of the selected schema(s) and profiles of the sample data to be crawled.
   3. Profile: This allows the collection of table column statistics.
   4. Profile Unprofiled: This allows data that has not been profiled to be profiled.
   5. Schedule: Connectors can also be scheduled in advance to run crawling and/or profiling at prescribed times and selected intervals.
      Note: For more information on Scheduling, refer to Scheduling Connector.
4. Click on the Run button. This gathers all metadata from the connected source and puts it into the OvalEdge Data Catalog.

Additional Information

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