Azure Synapse Serverless CETAS error "External table location is not valid" - azure

Question

I'm using Synapse Serverless Pool and get the following error trying to use CETAS
Msg 15860, Level 16, State 5, Line 3
External table location path is not valid. Location provided: 'https://accountName.blob.core.windows.net/ontainerName/test/'
My workspace managed identity should have all the correct ACL and RBAC roles on the storage account. I'm able to query the files I have there but is unable to execute the CETAS command.
CREATE DATABASE SCOPED CREDENTIAL WorkspaceIdentity WITH IDENTITY = 'Managed Identity'
GO
CREATE EXTERNAL DATA SOURCE MyASDL
WITH ( LOCATION = 'https://accountName.blob.core.windows.net/containerName'
,CREDENTIAL = WorkspaceIdentity)
GO
CREATE EXTERNAL FILE FORMAT CustomCSV
WITH (
FORMAT_TYPE = DELIMITEDTEXT,
FORMAT_OPTIONS (ENCODING = 'UTF8')
);
GO
CREATE EXTERNAL TABLE Test.dbo.TestTable
WITH (
LOCATION = 'test/',
DATA_SOURCE = MyASDL,
FILE_FORMAT = CustomCSV
) AS
WITH source AS
(
SELECT
jsonContent
, JSON_VALUE (jsonContent, '$.zipCode') AS ZipCode
FROM
OPENROWSET(
BULK '/customer-001-100MB.json',
FORMAT = 'CSV',
FIELDQUOTE = '0x00',
FIELDTERMINATOR ='0x0b',
ROWTERMINATOR = '\n',
DATA_SOURCE = 'MyASDL'
)
WITH (
jsonContent varchar(1000) COLLATE Latin1_General_100_BIN2_UTF8
) AS [result]
)
SELECT ZipCode, COUNT(*) as Count
FROM source
GROUP BY ZipCode
;
If I've tried everything in the LOCATION parameter of the CETAS command, but nothing seems to work. Both folder paths, file paths, with and without leading / trailing / etc.
The CTE select statement works without the CETAS.
Can't I use the same data source for both reading and writing? or is it something else?

Answer 1

The issue was with my data source definition.
Where I had used https:\\ when I changed this to wasbs:\\ as per the following link TSQL CREATE EXTERNAL DATA SOURCE
Where it describes you have to use wasbs, abfs or adl depending on your data source type being a V2 storage account, V2 data lake or V1 data lake