Establishing a Connection
Creating a JDBC Data Source
You can create a JDBC data source to connect from your Java application. Creating a JDBC data source based on the CData JDBC Driver for Apache Impala consists of three basic steps:
- Add the driver JAR file to the classpath. The JAR file is located in the lib subfolder of the installation directory. Note that the .lic file must be located in the same folder as the JAR file.
- Provide the driver class. For example:
- Provide the JDBC URL. For example:
jdbc:apacheimpala:Server=127.0.0.1;Port=21050; or jdbc:cdata:apacheimpala:Server=127.0.0.1;Port=21050;
The second format above can be used whenever there is a conflict in your application between drivers using the same URL format to ensure you are using the CData driver. The URL must start with either "jdbc:apacheimpala:" or "jdbc:cdata:apacheimpala:" and can include any of the connection properties in name-value pairs separated with semicolons.
Connecting to Apache Impala
In order to connect to Apache Impala, set the Server, Port, and ProtocolVersion. You may optionally specify a default Database.
Authenticating to Apache Impala
There are several ways to authenticate to Apache Impala including NOSASL,LDAP,KERBEROS. The following sections cover how to connect over each.
Authenticating with NOSASL
When using NOSASL, no authentication is performaned. It is used when you are connecting to a server from a trusted location such as a test machine on your local network. By default, NOSASL is as the default AuthScheme, so no additional connection properties need to be set.
Authenticating with LDAP
To authenticate with LDAP, set the following connection properties:
- AuthScheme: Set this to LDAP.
- User: Set this to user to login as.
- Password: Set this to the password of the user.
Authenticating with Kerberos
Please see Using Kerberos for details on how to authenticate with Kerberos.