The function reads the contents of the named file, and returns the result as a LONG BINARY value.
The filename is relative to the starting directory of the database server.
The function can be useful for inserting entire documents or images stored in files into tables. If the file cannot be read, the function returns NULL.
The following statement inserts an image into a column named picture of the table t1 (assuming all other columns can accept NULL):
INSERT INTO t1 ( picture)
SELECT xp_read_file( 'portrait.gif' )