@José Roberto Madureira Junior Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
This article shows you how to use query acceleration to retrieve a subset of data from your storage account: https://learn.microsoft.com/en-us/azure/storage/blobs/data-lake-storage-query-acceleration-how-to?tabs=azure-powershell%2Cpowershell
As of now to get the contents of the blob --> Query acceleration for CSV and Json is there, PDF is not available as of now.. So the workaround is that he downloads the PDF and does the filter on client side using some PDF reader ( third party) in their application
There is a similar thread discussion here can you please refer to the suggestion mentioned over-there and let me know the status
Additional information: Easiest way to list and extract the content of PDF files in Azure Blob Storage you can use Azure Storage Explorer tool
Get-AzStorageBlob -Container 'containerName' -Context $StorageContext | Where-Object {!($_.Name -like '*.pdf')}
If you want to read pdf form azure blob, please refer to the following code
Please let us know if you have any further queries. I’m happy to assist you further.
Looking forward for your reply!
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