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 Presto

Set the Server and Port connection properties to connect, in addition to any authentication properties that may be required.

Securing Presto Connections

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

Authenticating to Presto

Presto may be authenticated to by either LDAP or Kerberos. If the Presto server does not have authentication set up, leave AuthScheme set to NONE (default). In order to authenticate with either LDAP or Kerberos, follow the below steps:

LDAP

In order to authenticate with LDAP, set the following connection properties:

• AuthScheme: Set this to LDAP.
• User: The username being authenticated with in LDAP.
• Password: The password associated with the User you are authenticating against LDAP with.

Kerberos

Please see Using Kerberos for details on how to authenticate with Kerberos.

Using the FireDAC Connection Editor

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

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

• Expand the CData Presto 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.