Skip to Main Content
Oracle PL/SQL Programming: A Developer's Workbook
book

Oracle PL/SQL Programming: A Developer's Workbook

by Steven Feuerstein, Andrew Odewahn
May 2000
Intermediate to advanced content levelIntermediate to advanced
594 pages
11h 32m
English
O'Reilly Media, Inc.
Content preview from Oracle PL/SQL Programming: A Developer's Workbook

Intermediate

Q:

24-13.

You can do these operations:

a. Read sequentially the contents of a server-side file.
b. Append text to the end of an existing file.
e. Create a new file and write text to it.

You definitely cannot do these operations:

c. Read from a “random” location in a file.
d. Delete a file.

You can accomplish these tasks only by reading in the complete contents of a file and then processing that text (write it to another file or to a another file in a different directory, or count the bytes):

f. Copy a file.
g. Move a file to a different location.
h. Change the access privileges on a file.
i. Obtain the number of bytes in a file without reading the entire file.

Q:

24-14.

You see the following exception:

ORA-01403: no data found

This program keeps on reading forever, or until an exception is raised. UTL_FILE.GET_LINE raises the NO_DATA_FOUND exception when it reads past the end of the file, so you get an unhandled exception.

Q:

24-15.

Here is one possible implementation:


/* Filename on web page: showfile.sp */
CREATE OR REPLACE PROCEDURE show_file (
   loc IN VARCHAR2,
   file IN VARCHAR2
   )
IS
   fid UTL_FILE.FILE_TYPE := UTL_FILE.FOPEN (loc, file, 'R');
   line VARCHAR2(2000);
BEGIN
   DBMS_OUTPUT.PUT_LINE ('Contents of ' || file);
   LOOP
      UTL_FILE.GET_LINE (fid, line);
      DBMS_OUTPUT.PUT_LINE (line);
   END LOOP;
EXCEPTION
   WHEN OTHERS THEN UTL_FILE.FCLOSE (fid);
END;
/

Notice that this program reads and displays ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Oracle Database 12c PL/SQL Programming

Oracle Database 12c PL/SQL Programming

Michael McLaughlin
Oracle PL/SQL for DBAs

Oracle PL/SQL for DBAs

Arup Nanda, Steven Feuerstein
Oracle PL/SQL For Dummies

Oracle PL/SQL For Dummies

Michael Rosenblum, Paul Dorsey

Publisher Resources

ISBN: 9781449324070Supplemental ContentErrata Page