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:

10-6.

Choices (b), (e), (f), and (i) are all valid cursor attributes. They return the following information:

%ROWCOUNT

Returns the number of rows processed by the cursor at that point (this number might reflect the number of rows fetched or the number of rows processed—that is, deleted, updated, or inserted).

%ISOPEN

Is a Boolean attribute that returns TRUE when a cursor is open.

%FOUND

Is a Boolean attribute that returns TRUE if the last fetch returned a row and FALSE if not.

%NOTFOUND

Is a Boolean attribute that returns TRUE if the last fetch did not return a row and FALSE if it did.

For explicit cursors, they are specified as cursor name%attribute ; for example, CURS_GET_EMPS%FOUND. For implicit cursors, they are specified as SQL%attribute ; for example, SQL%NOTFOUND.

Q:

10-7.

The usages are:

  1. Invalid. It raises an INVALID_CURSOR exception, since the cursor has not been opened, and you are checking the FOUND attribute.

  2. Valid.

  3. Invalid. You’re referencing the %ROWCOUNT attribute as though it were a Boolean expression. It is, in fact, a numeric attribute.

  4. Invalid. You’re applying the attribute to a record instead of the cursor.

  5. Invalid. You’re applying the attribute to the table name rather the “SQL” keyword, as is necessary with implicit attributes.

Q:

10-8.

You are executing the CLOSE after the RETURN statement, so in fact that CLOSE statement is never run. It would therefore seem that your cursor would remain open and you would run out of open cursors in your session. That is not, however, ...

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