FireDAC Components for Apache Hive

Build 21.0.7930

Establishing a Connection

You can create and manage connections with the Data Explorer and the FireDAC Connection Editor wizards. See Connection Definitions for more information on creating connections from code and creating persistent, private, or temporary connections.

Connecting to Apache Hive

Specify the following to establish a connection with Apache Hive:

  • TransportMode: The transport mode to use to communicate with the Hive server. Accepted entries are BINARY and HTTP. BINARY is selected by default.
  • Server: Set this to the host name or IP address of the server hosting HiveServer2.
  • Port: Set this to the port for the connection to the HiveServer2 instance.

Authenticating to Apache Hive

Authenticating with PLAIN

Set AuthScheme to PLAIN when the hive.server2.authentication property is set to None (uses Plain SASL), PAM, or CUSTOM. In addition, set the following connection properties:

  • User: Set this to user to login as. If nothing is set, 'anonymous' will be sent instead.
  • Password: Set this to the password of the user. If nothing is set, 'anonymous' will be sent instead.
To authenticate, set User and Password.

Authenticating with LDAP

Set AuthScheme to LDAP when the hive.server2.authentication property is set to LDAP. In addition, set the following connection properties:

  • User: Set this to user to login as.
  • Password: Set this to the password of the user.
To authenticate, set User, Password, and AuthScheme.

Authenticating with NoSasl

Set AuthScheme to NoSasl when the hive.server2.authentication property is set to NoSasl. There are no user credentials submitted in this auth scheme.

Authenticating with Kerberos

Set AuthScheme to LDAP when the hive.server2.authentication property is set to Kerberos. Please see Using Kerberos for details on how to authenticate with Kerberos.

Securing Apache Hive Connections

To enable TLS/SSL in the component, set UseSSL to True.

Using the FireDAC Connection Editor

Complete the following steps to use the FireDAC Connection Editor to assign a Apache Hive connection to a TFDConnection object:

  1. Open a project and drop a TFDPhysCDataApacheHiveDriverLink from the Tool Palette onto the Form Designer.
  2. Drop a TFDConnection object onto the Form Designer.
  3. Double-click the TFDConnection and select CDataApacheHive in the Driver Id menu.
  4. Define the necessary connection properties.
  5. To execute ad-hoc SQL statements based on this connection, enter SQL commands on the SQL Script tab.
  6. In the Form Designer, select the TFDConnection object and set the Connected property to true.

Using the Data Explorer

Complete the following steps to use the Data Explorer to define persistent connections that can be shared across applications and projects:

  1. Click View > Tool Windows > Data Explorer in RAD Studio and expand the FireDAC node.
  2. Right-click the CData Apache Hive Data Source node and click Add New Connection.
  3. Enter a name for the connection. The FireDAC Connection Editor opens.

Working with Persistent Connections

The connections you define in the Data Explorer can be assigned to a TFDConnection object by specifying the connection name in the TFDConnection object's ConnectionDefName property.

Browsing Data and Metadata

The Data Explorer also provides options for browsing Apache Hive objects at design time:

  • Expand the CData Apache Hive Data Source node in the Data Explorer to view the defined connections.
  • Expand a connection node to find the database objects available for a connection.
  • Drill down to a database object to find metadata such as primary keys.
  • To display data, double-click a table or view or right-click and click View.

Copyright (c) 2021 CData Software, Inc. - All rights reserved.
Build 21.0.7930