Can't create an external data source from Azure Blob Storage Container to Azure Sql Database Hyperscale

Question

I have uploaded a single file (BlockBlob) to a container in the Azure BlobStorage

This is the path: https://myStorageName.blob.core.windows.net/myContainerName/myFolder.Name/myFileName.json

I want to load this file into a table within Azure Sql Database

If I create a SAS to the file, things works perfectly. However I am failing to generate a single SAS that can access multiple files inside a container.

Here is the code that works:

CREATE DATABASE SCOPED CREDENTIAL TemporaryBlobSCredential
 WITH IDENTITY = 'SHARED ACCESS SIGNATURE',
 SECRET = 'sp=......................'

CREATE EXTERNAL DATA SOURCE TemporaryBlobDataSource
 WITH ( TYPE = BLOB_STORAGE,
       LOCATION = 'https://<myStorageName>.blob.core.windows.net/<myContainerName>',
       CREDENTIAL= TemporaryBlobSCredential);

create table <tableName>
(JsonData varchar(max))
 
BULK INSERT <tableName>
FROM '<myFolder.Name>/<myFileName>.json'
WITH (DATA_SOURCE = 'TemporaryBlobDataSource');
 

If I generate a SAS that has ALL the permissions (SECRET = '?sv=......') it won't work:

Should I use something different? Does it even works?

Answer 1

I just tried to run the code which you shared and it is very similar to what is pasted here . if you scroll up on the page , the "Applies to" does not call out synapse / SQL DW . Are you sure that you are using Synapse ? BULK INERT is not supported in SQL pool .

Anyways if you are using Synapse generally we can use the COPY INTO command but in your case we have JSON format which is not support . I think you can use Azure datafactory

Answer 2

This document says:

Warning

The SAS key value might begin with a '?' (question mark). When you use the SAS key, you must remove the leading '?'. Otherwise your efforts might be blocked.

I notice in your working code there is no '?' but there is in your SAS token which doesn't work. Can you double check this small difference isn't the problem?