How to Save pdf file in the BLOB field in the database

Question

I have to save a pdf file which is on the client machine to save in the database column of type BLOB. How can i do that?

Answer 1

LostWorld wrote:
I have to save a pdf file which is on the client machine to save in the database column of type BLOB. How can i do that?PL/SQL code cannot hack across the network. break into that client machine, and read that PDF file from the client's harddrive.
There is a very fundamental client-server principle at stake here - the purpose of the client. What is the purpose of the client? Amongst others, it is to interface with the client hardware and peripherals and devices. Like reading the client keyboard and sending that to the server. Or reading data from the sever and rendering it on the client's display device. Or to receive CSV data from the server and writing it to a local file.
It's purpose is also to read a local file, like a PDF file, and submit that file's contents to the server for storage.
The following pseudo code explains the basic principle:
client
  // call oracle to create a LOB
  ExecuteSQL( 'DBMS_LOB.CreateTemporary( .. )' )
  open file( fileHandle )
  while not EOF( fileHandle )
    // read data from the file
    read file( fileHandle, buffer )
    // write this buffer to the LOB in Oracle
    ExecuteSQL( 'DBMS_LOB.writeAppend( .. )' )
  end while
  close file( fileHandle )
  // now tell Oracle what to do with that LOB
  ExecuteSQL( '...' )
  .. etc..Thus the client:
a) creates a LOB in Oracle via a PL/SQL call
b) passes data from the client and appends it to the LOB
c) tells Oracle what to do with LOB, such as inserting it into a table