Ensuring backward compatibility, PL-SQL Programming

Assignment Help:

Ensuring Backward Compatibility

The PL/SQL Version 2 permits some abnormal behavior which Version 8 disallows.

Particularly, Version 2 permits you to

(i) Make the forward references to RECORD and TABLE types when declaring the variables.

(ii) Specify the name of the variable (not a datatype) in the RETURN clause of the function specification.

(iii) Assign values to the elements of an index-by table IN parameter.

(iv) Pass the fields of a record IN parameter to the other subprogram as OUT parameters

(v) Use the fields of a record OUT parameter on the right-hand side of the assignment statement.

(vi) Use the OUT parameters in the FROM list of a SELECT statement.

For backward compatibility, you might want to remain this particular Version 2 behavior. You can do it by setting the PLSQL_V2_COMPATIBILITY flag. At server side, you can set the flag in 2 ways:

(i) Add the line below to the Oracle initialization file:

PLSQL_V2_COMPATIBILITY=TRUE

(ii)Execute one of the SQL statements below:

ALTER SESSION SET PLSQL_V2_COMPATIBILITY = TRUE;

ALTER SYSTEM SET PLSQL_V2_COMPATIBILITY = TRUE;

Related Discussions:- Ensuring backward compatibility

Insert command in sql, INSERT Command in SQL Loosely speaking, INSERT...

INSERT Command in SQL Loosely speaking, INSERT takes the rows of a given source table and adds them to the specified target table, retaining all the existing rows in the targ

Parameter and keyword description - open-for statement, Parameter and Keywo...

Parameter and Keyword Description: cursor_variable_name: This identifies a cursor variable or the parameter formerly declared within the present scope. host_cursor_va

Keyword and parameter description - cursors, Keyword and Parameter Descript...

Keyword and Parameter Description select_statement: This is a query which returns a result set of the rows. Its syntax is such that of select_ into_statement without the IN

Using aliases-declarations in sql, Using Aliases The Select-list items f...

Using Aliases The Select-list items fetched from a cursor related with the %ROWTYPE should have simple names or, if they are expressions, should have aliases. In the example bel

Update command- sql, UPDATE Command- SQL Loosely speaking, UPDATE chan...

UPDATE Command- SQL Loosely speaking, UPDATE changes some of the column values of some existing rows of its target table. Thus, although some rows disappear from the target an

Goto statement - syntax, GOTO Statement The GOTO statement branches ...

GOTO Statement The GOTO statement branches categorically to a block label or statement label. The label should be exclusive within its scope and should precede a PL/SQL bloc

Comparison operators - sql operators, Comparison Operators Usually, yo...

Comparison Operators Usually, you use the comparison operators in the WHERE clause of a data manipulation statement to form the predicates, that compare one expression to anot

Need to change mysql query to pdo, Need to change mysql query to PDO Pro...

Need to change mysql query to PDO Project Description: I want someone to convert me 1 .php file that includes some sql/mysql stuff to PDO is a very small file. Skills requ

Initializing and referencing collections, Initializing and Referencing Coll...

Initializing and Referencing Collections Until you initialize a collection, a nested table or varray is automatically null (i.e. the collection itself is null, not its elements)

Advantages of exceptions, Advantages of Exceptions Using the exception...

Advantages of Exceptions Using the exceptions for the error handling has many benefits. Without an exception handling, every time you issue a command, you should ensure for th

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages