Creating a Dataloader
Use the Service Development perspective in Designer to create a Dataloader.
To create a Dataloader
1. In the Package Navigator view, open the GraphQL descriptor for which you want to create a Dataloader.
2. Click the Dataloaders tab.
3. Click the Add a Dataloader icon 
from the toolbar. 4. In the Add a Dataloader dialog box, enter the following details and click OK:
Field | Description |
Name | Name of the Dataloader. Note:
Ensure that the Dataloader name is different from an existing Dataloader or loader service name. |
Caching | When selected, enables caching in Dataloader. |
Batching | When selected, enables batching in Dataloader. |
Max Batch Size | Maximum number of keys in a batch that a Dataloader receives when Integration Server invokes the loader service. The default value is -1. You can set any positive integer value for this property. The value -1 or 0 indicates that there are no restrictions to the batch size. |
Output Value Type | Data type of the output field value. |
Output Value Dimension Dataloader | Dimension of the output value of Dataloader. You can set any positive integer value for this property. Example: 0 - Indicates that there is just one value for one key. 1 - Indicates that there is a list of value for one key. 2 - Indicates a two-dimensional array of values for one key. |
Designer creates the Dataloader.
5. Click Save.
Designer creates the associated loader service and a document type for keys under the loaders folder in Package Navigator. The loader service name is same as the Dataloader name. The key name is a combination of Dataloader name with the first letter in uppercase and the term Key. For example, the key name for a Dataloader named "testLoader", is TestLoaderKey.
The Properties view displays the
Dataloader properties. For more information about the fields in the Properties view, see
GraphQL Dataloaders.
Note:
You cannot rename a Dataloader.
You can now use the GraphQL descriptor with Dataloader in a resolver service to fetch data from the data source.