Azure Blob Reader
This task is used to read data from Azure blob container.
Configuring the Meta Information tab fields
Read using: There are three(3) options available under this tab:
Shared Access Signature:
Secret Key
Principal Secret
Read using Shared Access Signature:
Provide the following details:
Shared Access Signature: This is a URI that grants restricted access rights to Azure Storage resources.
Account Name: Provide the Azure account name.
Container: Provide the container name from where the file is located and which has to be read.
File type: There are four(5) types of file extensions are available under it:
CSV: The Header and Infer Schema fields get displayed with CSV as the selected File Type. Enable Header option to get the Header of the reading file and enable Infer Schema option to get true schema of the column in the CSV file.
JSON: The Multiline and Charset fields get displayed with JSON as the selected File Type. Check-in the Multiline option if there is any multiline string in the file.
PARQUET: No extra field gets displayed with PARQUET as the selected File Type.
AVRO: This File Type provides two drop-down menus.
Compression: Select an option out of the Deflate and Snappy options.
Compression Level: This field appears for the Deflate compression option. It provides 0 to 9 levels via a drop-down menu.
XML: Select this option to read XML file. If this option is selected, the following fields will get displayed:
Infer schema: Enable this option to get true schema of the column.
Path: Provide the path of the file.
Root Tag: Provide the root tag from the XML files.
Row Tags: Provide the row tags from the XML files.
Join Row Tags: Enable this option to join multiple row tags.
Path: This option will appear once the file type is selected. Enter the path where the selected file type is located.
Read Directory: Check in this box to read the specified directory.
Query: Provide Spark SQL query in this field.
Read using Secret Key Option:
Provide the following details:
Account Key: Enter the Azure account key. In Azure, an account key is a security credential that is used to authenticate access to storage resources, such as blobs, files, queues, or tables, in an Azure storage account.
Account Name: Provide the Azure account name.
Container: Provide the container name from where the blob is located. A container is a logical unit of storage in Azure Blob Storage that can hold blobs. It is similar to a directory or folder in a file system, and it can be used to organize and manage blobs.
File type: There are four(5) types of file extensions are available under it:
CSV: The Header and Infer Schema fields get displayed with CSV as the selected File Type. Enable Header option to get the Header of the reading file and enable Infer Schema option to get true schema of the column in the CSV file.
JSON: The Multiline and Charset fields get displayed with JSON as the selected File Type. Check-in the Multiline option if there is any multiline string in the file.
PARQUET: No extra field gets displayed with PARQUET as the selected File Type.
AVRO: This File Type provides two drop-down menus.
Compression: Select an option out of the Deflate and Snappy options.
Compression Level: This field appears for the Deflate compression option. It provides 0 to 9 levels via a drop-down menu.
XML: Select this option to read XML file. If this option is selected, the following fields will get displayed:
Infer schema: Enable this option to get true schema of the column.
Path: Provide the path of the file.
Root Tag: Provide the root tag from the XML files.
Row Tags: Provide the row tags from the XML files.
Join Row Tags: Enable this option to join multiple row tags.
Path: This option will appear once the file type is selected. Enter the path where the selected file type is located.
Read Directory: Check in this box to read the specified directory.
Query: Provide Spark SQL query in this field.
Read using Principal Secret:
Provide the following details:
Client ID: Provide Azure Client ID. The client ID is the unique Application (client) ID assigned to your app by Azure AD when the app was registered.
Tenant ID: Provide the Azure Tenant ID. Tenant ID (also known as Directory ID) is a unique identifier that is assigned to an Azure AD tenant, which represents an organization or a developer account. It is used to identify the organization or developer account that the application is associated with.
Client Secret: Enter the Azure Client Secret. Client Secret (also known as Application Secret or App Secret) is a secure password or key that is used to authenticate an application to Azure AD.
Account Name: Provide the Azure account name.
Container: Provide the container name from where the blob is located. A container is a logical unit of storage in Azure Blob Storage that can hold blobs. It is similar to a directory or folder in a file system, and it can be used to organize and manage blobs.
Query: Provide Spark SQL query in this field.
File type: There are four(5) types of file extensions are available under it:
CSV: The Header and Infer Schema fields get displayed with CSV as the selected File Type. Enable Header option to get the Header of the reading file and enable Infer Schema option to get true schema of the column in the CSV file.
JSON: The Multiline and Charset fields get displayed with JSON as the selected File Type. Check-in the Multiline option if there is any multiline string in the file.
PARQUET: No extra field gets displayed with PARQUET as the selected File Type.
AVRO: This File Type provides two drop-down menus.
Compression: Select an option out of the Deflate and Snappy options.
Compression Level: This field appears for the Deflate compression option. It provides 0 to 9 levels via a drop-down menu.
XML: Select this option to read XML file. If this option is selected, the following fields will get displayed:
Infer schema: Enable this option to get true schema of the column.
Path: Provide the path of the file.
Root Tag: Provide the root tag from the XML files.
Row Tags: Provide the row tags from the XML files.
Join Row Tags: Enable this option to join multiple row tags.
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