FireDAC Components for HPCC

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.

To connect, set the following connection properties.

Set Url to the machine name or IP address of the server and the port the server is running on, for example, https://server:port. The User and Password are required to authenticate to the HPCC system specified in Url. Note that LDAP authentication is not currently supported.

Set Version to the WsSQL Web server version. Note that if you have not already done so, you will need to install the WsSQL service on the HPCC server. The CData FireDAC Components for HPCC uses the WsSQL Web service to interact with the underlying HPCC system.

Set Cluster to the target cluster.

Using the FireDAC Connection Editor

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

  1. Open a project and drop a TFDPhysCDataHPCCDriverLink from the Tool Palette onto the Form Designer.
  2. Drop a TFDConnection object onto the Form Designer.
  3. Double-click the TFDConnection and select CDataHPCC 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 HPCC 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 HPCC objects at design time:

  • Expand the CData HPCC 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