You need to know the server name that you want to connect to, in order to access data stored in Presto-configured databases. If LDAP authentication is required, you must also have access credentials. You can authenticate with Kerberos if you are using Qlik Sense Enterprise on Windows.
Once you have created a Presto connection, you can select data from the available databases and tables and load that data into your app. If you select multiple databases, data will be loaded from all of them at the same time.
In Qlik Sense, you connect to Presto through the Add data dialog or the Data load editor.
Setting up the database properties
| Database property | Description | Required |
|---|---|---|
| Direct Gateway |
This field will only appear if you selected the "via Direct Access gateway" data connection. Select the data gateway through which you need to connect to your data source. Information noteUsers that need to leverage gateway-enabled data connections must have the Can Consume Data permission for the space in which the gateway resides.
|
Yes |
| Host name | The IP address or host name of the Presto server. | Yes |
| Port | Port number for the Presto server. | Yes |
| Catalog (Project) | The name of a database available to the Presto server. Specifying a database preselects it for the data selection step, but additional databases can be selected during the data selection process. | No |
Authentication
Qlik Sense: Presto authentication options
| Property | Description |
|---|---|
| Authentication Type | Choose authentication method: no authentication,LDAP , or Kerberos. Kerberos authentication is only available if you are using Qlik Sense Enterprise on Windows. Selecting LDAP Authentication gives you the option to set up Account properties. |
| Username | Username for the Presto connection when using LDAP authentication. |
| Password | Password for the Presto connection when using LDAP authentication. |
| Name |
Name of the Presto connection. The default name will be used if you do not enter a name. |
Account properties
Credentials
Credentials are used to prove that a user is allowed to access the data in a connection.
There are two types of credentials that can be used when making a connection in Qlik Sense SaaS. If you leave the User defined credentials check box deselected, then only one set of credentials will be used for the connection. These credentials belong to the connection and will be used by anyone who can access it. For example, if the connection is in a shared space, every user in the space will be able to use these credentials. This one-to-one mapping is the default setting.
If you select User defined credentials, then every user who wants to access this connection will need to input their own credentials before selecting tables or loading data. These credentials belong to a user, not a connection. User defined credentials can be saved and used in multiple connections of the same connector type.
In the Data load editor, you can click the 
underneath the connection to edit your credentials. In spaces or Data manager, you can edit credentials by right-clicking on the connection and selecting Edit Credentials.
See which authentication type applies on each connector's page.
| Account property | Description |
|---|---|
| User defined credentials | Select this check box if you want users that access this connection to have to input their own credentials. Deselect this check box if credentials can be shared with anyone who has access to this connection. |
| New credentials | Drop-down menu item that appears if User defined credentials is selected. |
| Existing credentials | Drop-down menu item that appears if User defined credentials is selected. |
| User | User name for the connection. |
| Password | Password for the connection. |
| Credentials name | Name given to a set of user defined credentials. |
Setting SSL options
| Property | Description | Required |
Windows only |
|---|---|---|---|
| Enable SSL | Require SSL authentication on the connection the Presto server. | No | No |
| Use System Trust Store | Use the SSL certificate located in the standard system location used for storing trusted certificates. This property can be selected only when SSL is enabled. | No | Yes |
| Full path of Trusted Certificates | The full path to the SSL certificate if it is not stored in the standard system location. This property can be selected only when SSL is enabled. | No | Yes |
| Allow Self-signed Server Certificate | Accept an SSL certificate from the server that is self-signed and not verified by a trusted authority. This property can be selected only when SSL is enabled. | No | No |
| Allow Common Name Host Name Mismatch | Allow a mismatch between the SSL certificate's common name and the host name of the Presto server. This property can be selected only when SSL is enabled. | No | No |
Miscellaneous properties
| Property | Description |
|---|---|
| Query timeout | Amount of time before a data load query times out. Can be set from 30 seconds to 65535 seconds. Default is 30 seconds. |
Load optimization settings
| Property | Description | Required |
|---|---|---|
| Max String Length |
Maximum length of string fields. This can be set from 256 to 16384 characters. The default value is 4096. Setting this value close to the maximum length may improve load times, as it limits the need to allocate unnecessary resources. If a string is longer than the set value, it will be truncated, and the exceeding characters will not be loaded. |
No |
Advanced options
| Property | Description | Required |
|---|---|---|
|
Name |
Name of the custom property. You can add additional properties by clicking the |
No |
| Value |
Value of the property. |
No |
.