Using cursor attributes - bulk bind performance improvement, PL-SQL Programming

Using cursor attributes - bulk bind performance improvement, PL-SQL Programming

Assignment Help:

Using Cursor Attributes

To process the SQL data manipulation statements, the SQL engine must opens an implicit cursor named SQL. This cursor's attributes (%FOUND, %NOTFOUND, %ISOPEN, and %ROWCOUNT) return all the useful information about the most recently executed SQL data manipulation statement.

The SQL cursor has only one composite attribute, like %BULK_ROWCOUNT that has the semantics of an index-by table. The ith element stores the number of rows processed by the ith execution of the SQL statement. If the ith execution affects no rows, %BULK_ ROWCOUNT(i) returns zero. An illustration is shown below:

DECLARE

TYPE NumList IS TABLE OF NUMBER;

depts NumList := NumList(10, 20, 50);

BEGIN

FORALL j IN depts.FIRST..depts.LAST

UPDATE emp SET sal = sal * 1.10 WHERE deptno = depts(j);

IF SQL%BULK_ROWCOUNT(3) = 0 THEN

...

END IF

END;

The %BULK_ROWCOUNT and the FORALL statement use the similar subscripts. For illustration, if the FORALL statement uses the range -5...10, so does %BULK_ROWCOUNT.

Related Discussions:- Using cursor attributes - bulk bind performance improvement

Example of foreign key constraint - sql, Example of Foreign Key Constraint ...

Example of Foreign Key Constraint Example: Alternative formulation for 6.3 as a foreign key constraint ALTER TABLE EXAM_MARK ADD CONSTRAINT Must_be_enrolled_to_take_exam

Fetch statement - syntax, FETCH Statement The FETCH statement retrieve ...

FETCH Statement The FETCH statement retrieve rows of data one at a time from the result set of the multi-row query. The data is stored in fields or variables which correspond t

Unnest operator in sql, UNNEST operator in SQL The inverse operator of...

UNNEST operator in SQL The inverse operator of GROUP is UNGROUP. SQL has an operator, UNNEST, that can be used for similar purposes, but its method of invocation is somewhat p

Accessing attributes in pl sql, Accessing Attributes: You can refer to ...

Accessing Attributes: You can refer to an attribute only by its name not by its position in the object type. To access or modify the value of an attribute, you can use the dot

Query, ALTER TABLE bb_basketitem ADD CONSTRAINT bitems_qty_ck CHECK (quan...

ALTER TABLE bb_basketitem ADD CONSTRAINT bitems_qty_ck CHECK (quantity BEGIN INSERT INTO bb_basketitem VALUES (88,8,10.8,21,16,2,3); END; Brewbean’s wants to add a check

Error handling in pl/sql, Error Handling The PL/SQL makes it easy to de...

Error Handling The PL/SQL makes it easy to detect and process the predefined and user-defined error conditions known as exceptions. Whenever an error occurs, an exception is ra

Using operator deref - manipulating objects in pl sql, Using Operator DEREF...

Using Operator DEREF: You cannot navigate through refs within the PL/SQL procedural statements. Rather than, you should use the operator DEREF in the SQL statement. The DEREF

Anatomy of a command, Anatomy of a Command Figure, showing a simple S...

Anatomy of a Command Figure, showing a simple SQL command, is almost identical to its counterpart in the theory book. The only difference arises from the fact that SQL uses a

Change sql file into csv for product registration, Change Sql file into CSV...

Change Sql file into CSV for product registration on Magento Project Description: I have a set of files that are in Sql format and could like for a developer to help me with

Recursive subprograms, Recursive Subprograms The recursive subprogram ...

Recursive Subprograms The recursive subprogram is the one that calls itself. Think of a recursive call as a call to a few other subprograms that does the similar task as your

Write Your Message!

Name

Email id

Message

Verfication Code

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd