LONGBLOB

Hello

Maybe you can help me with this:

I've saved in a MySQL database table an image field (in blob format, of course).
When I try to get the content of that field on another application, in this case on a B4A(android), it always returns an empty string.
Is MVD format not a standard image blob? (I'm new to this)

I've tried with many ways like, mysql:

SELECT grafico as imagem from orcamentos where record_count = 20402;

or

SELECT convert (grafico using utf8) as imagem from orcamentos where record_count = 20402;

and i always get:   Response from server: [{"imagem":""}]

Any suggestions?

Thanks

Best regards