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It returns TRUE if an INSERT, UPDATE, or DELETE statement affected no rows, or a SELECT INTO statement returned no rows. Returns TRUE if an INSERT, UPDATE, or DELETE statement affected one or more rows or a SELECT INTO statement returned one or more rows. The following table provides the description of the most used attributes − S.No The SQL cursor has additional attributes, %BULK_ROWCOUNT and %BULK_EXCEPTIONS, designed for use with the FORALL statement. In PL/SQL, you can refer to the most recent implicit cursor as the SQL cursor, which always has attributes such as %FOUND, %ISOPEN, %NOTFOUND, and %ROWCOUNT.
#HOW TO CUSTOMIZE CURSOR PROCESSING UPDATE#
For UPDATE and DELETE operations, the cursor identifies the rows that would be affected. For INSERT operations, the cursor holds the data that needs to be inserted. Whenever a DML statement (INSERT, UPDATE and DELETE) is issued, an implicit cursor is associated with this statement. Programmers cannot control the implicit cursors and the information in it. Implicit cursors are automatically created by Oracle whenever an SQL statement is executed, when there is no explicit cursor for the statement. You can name a cursor so that it could be referred to in a program to fetch and process the rows returned by the SQL statement, one at a time. The set of rows the cursor holds is referred to as the active set. A cursor holds the rows (one or more) returned by a SQL statement.
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PL/SQL controls the context area through a cursor. Oracle creates a memory area, known as the context area, for processing an SQL statement, which contains all the information needed for processing the statement for example, the number of rows processed, etc.Ī cursor is a pointer to this context area. In this chapter, we will discuss the cursors in PL/SQL.
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