How to store and load images in PostgreSQL db?

Hello,

I recently started using PostgresDAC 9.0 and had no trouble getting things
to work until I started to try to find out if it is possible to store (and
load) images in the Postgresql db from Delphi 7. I read about it and in my
opinion it is the best option to use a Bytea field.
Now I am struggling to find out how to save and load data to this field from
Delphi.
My test code is fairly simple:

PSQLTable1.Insert;
BlobField := TBlobField(PSQLTable1.FieldByName('Picture_Bytea'));
BlobField.LoadFromFile('picture.bmp');
PSQLTable1.Post;

(PSQLTable1 is on the form.)
This works fine until the Post procedure is called. A db error near "\"
appears.

Instead of using a table I would rather use a Query, but I can't get to work
that at all.

Query := TPSQLQuery.Create(nil);
Query.DataBase := Db;
BlobField := TBlobField.Create(nil);
try
BlobField.LoadFromFile('picture.bmp');
Query.SQL.Text := Format ('insert into "tblImage" ("Picture_Bytea")
values (%s)', [QuotedStr(BlobField.Value)]);
Query.Open;
finally
Query.Free;
BlobField.Free;
end;

Apparantly it is not allowed to create a TBlobField this way and I don't
think it's a good idea to format a bytea-field as a string (%s) either.

Sorry for my newbie question. I hope someone will be able to point me in the
right direction to get this working as I have been searching all over the
internet, but have not been able to find a solution. Even finding a correct
forum to post this question is difficult as there does not seem to be a
PostgreSQL forum for Delphi users.

Thanks in advance!

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