Problem in bfile

Question

hi ,
i made a table emp_dat whose structure is,
empno number primary key,
picture blob,
bio clob,
hr_file bfile
then i inserted a word file in hr_file column. after that when i tried to display its contents through select statement it gave an error which reads like this,
procedure,function,packageor type not allowed. plz help me in finding the solution.
thanking u
akhilesh

Answer 1

The procedure to select data - open the file, read and store the data into a variable and then display. To achieve you need to use FILEOPEN & READ procedures of DBMS_LOB package. To display the data use PUT_LINE procedure of DBMS_OUTPUT package.
To open the file using FILEOPEN you need two parameters
1. File Locator
2. Open Mode (ex: 'READ', 'WRITE' )
To read the data you need to use the READ procedure of DBMS_LOB package which takes four parameters
1. The File Locator
2. The number of bytes or characters to be read
3. The offset (starting point of the read) from the beginning of the BFILE value
4. The output data from the READ procedure (i.e., variable to hold the output)
Regards,
Murali Mohan