Copy data from Impala by using Azure Data Factory (Preview)

This article outlines how to use Copy Activity in Azure Data Factory to copy data from Impala. It builds on the Copy Activity overview article that presents a general overview of the copy activity.

Important

This connector is currently in preview. You can try it out and provide feedback. If you want to take a dependency on preview connectors in your solution, please contact Azure support.

Supported capabilities

You can copy data from Impala to any supported sink data store. For a list of data stores that are supported as sources or sinks by the copy activity, see the Supported data stores table.

Data Factory provides a built-in driver to enable connectivity. Therefore, you don't need to manually install a driver to use this connector.

Get started

You can use one of the following tools or SDKs to use Copy Activity with a pipeline. Select a link for step-by-step instructions:

The following sections provide details about properties that are used to define Data Factory entities specific to the Impala connector.

Linked service properties

The following properties are supported for Impala linked service.

Property Description Required
type The type property must be set to Impala. Yes
host The IP address or host name of the Impala server (that is, 192.168.222.160). Yes
port The TCP port that the Impala server uses to listen for client connections. The default value is 21050. No
authenticationType The authentication type to use.
Allowed values are Anonymous, SASLUsername, and UsernameAndPassword.
Yes
username The user name used to access the Impala server. The default value is anonymous when you use SASLUsername. No
password The password that corresponds to the user name when you use UsernameAndPassword. Mark this field as a SecureString to store it securely in Data Factory, or reference a secret stored in Azure Key Vault. No
enableSsl Specifies whether the connections to the server are encrypted by using SSL. The default value is false. No
trustedCertPath The full path of the .pem file that contains trusted CA certificates used to verify the server when you connect over SSL. This property can be set only when you use SSL on Self-hosted Integration Runtime. The default value is the cacerts.pem file installed with the integration runtime. No
useSystemTrustStore Specifies whether to use a CA certificate from the system trust store or from a specified PEM file. The default value is false. No
allowHostNameCNMismatch Specifies whether to require a CA-issued SSL certificate name to match the host name of the server when you connect over SSL. The default value is false. No
allowSelfSignedServerCert Specifies whether to allow self-signed certificates from the server. The default value is false. No
connectVia The integration runtime to be used to connect to the data store. You can use Self-hosted Integration Runtime or Azure Integration Runtime (if your data store is publicly accessible). If not specified, it uses the default Azure Integration Runtime. No

Example:

{
    "name": "ImpalaLinkedService",
    "properties": {
        "type": "Impala",
        "typeProperties": {
            "host" : "<host>",
            "port" : "<port>",
            "authenticationType" : "UsernameAndPassword",
            "username" : "<username>",
            "password": {
                 "type": "SecureString",
                 "value": "<password>"
            }
        },
        "connectVia": {
            "referenceName": "<name of Integration Runtime>",
            "type": "IntegrationRuntimeReference"
        }
    }
}

Dataset properties

For a full list of sections and properties available for defining datasets, see the Datasets article. This section provides a list of properties supported by the Impala dataset.

To copy data from Impala, set the type property of the dataset to ImpalaObject. There is no additional type-specific property in this type of dataset.

Example

{
    "name": "ImpalaDataset",
    "properties": {
        "type": "ImpalaObject",
        "linkedServiceName": {
            "referenceName": "<Impala linked service name>",
            "type": "LinkedServiceReference"
        }
    }
}

Copy activity properties

For a full list of sections and properties available for defining activities, see the Pipelines article. This section provides a list of properties supported by the Impala source type.

Impala as a source type

To copy data from Impala, set the source type in the copy activity to ImpalaSource. The following properties are supported in the copy activity source section.

Property Description Required
type The type property of the copy activity source must be set to ImpalaSource. Yes
query Use the custom SQL query to read data. An example is "SELECT * FROM MyTable". Yes

Example:

"activities":[
    {
        "name": "CopyFromImpala",
        "type": "Copy",
        "inputs": [
            {
                "referenceName": "<Impala input dataset name>",
                "type": "DatasetReference"
            }
        ],
        "outputs": [
            {
                "referenceName": "<output dataset name>",
                "type": "DatasetReference"
            }
        ],
        "typeProperties": {
            "source": {
                "type": "ImpalaSource",
                "query": "SELECT * FROM MyTable"
            },
            "sink": {
                "type": "<sink type>"
            }
        }
    }
]

Next steps

For a list of data stores supported as sources and sinks by the copy activity in Data Factory, see Supported data stores.