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Oracle® Database PL/SQL Language Reference
11g Release 1 (11.1)

B28370-05
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SQL (Implicit) Cursor Attribute

A SQL (implicit) cursor is opened by the database to process each SQL statement that is not associated with an explicit cursor. Every SQL (implicit) cursor has six attributes, each of which returns useful information about the execution of a data manipulation statement.

Syntax

sql_cursor ::=

sql_cursor
Description of the illustration sql_cursor.gif

Keyword and Parameter Descriptions

%BULK_ROWCOUNT

A composite attribute designed for use with the FORALL statement. This attribute acts like an index-by table. Its ith element stores the number of rows processed by the ith execution of an UPDATE or DELETE statement. If the ith execution affects no rows, %BULK_ROWCOUNT(i) returns zero.

%BULK_EXCEPTIONS

An associative array that stores information about any exceptions encountered by a FORALL statement that uses the SAVE EXCEPTIONS clause. You must loop through its elements to determine where the exceptions occurred and what they were. For each index value i between 1 and SQL%BULK_EXCEPTIONS.COUNT, SQL%BULK_EXCEPTIONS(i).ERROR_INDEX specifies which iteration of the FORALL loop caused an exception. SQL%BULK_EXCEPTIONS(i).ERROR_CODE specifies the Oracle Database error code that corresponds to the exception.

%FOUND

Returns TRUE if an INSERT, UPDATE, or DELETE statement affected one or more rows or a SELECT INTO statement returned one or more rows. Otherwise, it returns FALSE.

%ISOPEN

Always returns FALSE, because the database closes the SQL cursor automatically after executing its associated SQL statement.

%NOTFOUND

The logical opposite of %FOUND. It returns TRUE if an INSERT, UPDATE, or DELETE statement affected no rows, or a SELECT INTO statement returned no rows. Otherwise, it returns FALSE.

%ROWCOUNT

Returns the number of rows affected by an INSERT, UPDATE, or DELETE statement, or returned by a SELECT INTO statement.

SQL

The name of the implicit cursor.

Usage Notes

You can use cursor attributes in procedural statements but not in SQL statements. Before the database opens the SQL cursor automatically, the implicit cursor attributes return NULL. The values of cursor attributes always refer to the most recently executed SQL statement, wherever that statement appears. It might be in a different scope. If you want to save an attribute value for later use, assign it to a variable immediately.

If a SELECT INTO statement fails to return a row, PL/SQL raises the predefined exception NO_DATA_FOUND, whether you check SQL%NOTFOUND on the next line or not. A SELECT INTO statement that invokes a SQL aggregate function never raises NO_DATA_FOUND, because those functions always return a value or a NULL. In such cases, SQL%NOTFOUND returns FALSE. %BULK_ROWCOUNT is not maintained for bulk inserts because a typical insert affects only one row. See Counting Rows Affected by FORALL (%BULK_ROWCOUNT Attribute).

You can use the scalar attributes %FOUND, %NOTFOUND, and %ROWCOUNT with bulk binds. For example, %ROWCOUNT returns the total number of rows processed by all executions of the SQL statement. Although %FOUND and %NOTFOUND refer only to the last execution of the SQL statement, you can use %BULK_ROWCOUNT to deduce their values for individual executions. For example, when %BULK_ROWCOUNT(i) is zero, %FOUND and %NOTFOUND are FALSE and TRUE, respectively.

Examples

Related Topics