What is a weak cursor type?

When a Ref-Cursor is defined without a return type, it is called as a weakly typed dynamic Ref-Cursor. There is no dependency on its return structure, thus making it open to all SELECT statements independent of its structure.

What is strong and weak ref cursor?

A strongly typed ref cursor always returns a known type, usually from a declared TYPE object. A weakly typed ref cursor has a return type that is dependant on the SQL statement it executes, i.e. only once the cursor is opened is the type known (at runtime).

How do you see the output of a ref cursor?

Using the classic SQL*PLUS PRINT command to view the refcursor output will work in SQL Developer just like it would work in your command line tools. You execute your program, you create a local variable or 3 to ‘catch’ said output, and then you PRINT it.

What is difference between cursor and ref cursor?

A cursor is really any SQL statement that runs DML (select, insert, update, delete) on your database. A ref cursor is a pointer to a result set. This is normally used to open a query on the database server, then leave it up to the client to fetch the result it needs.

What is ref cursor and its types?

A REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database. In essence, a REF CURSOR is a pointer or a handle to a result set on the database.

What is ref cursor?

A ref cursor is a variable, defined as a cursor type, which will point to, or reference a cursor result. The advantage that a ref cursor has over a plain cursor is that is can be passed as a variable to a procedure or a function. The REF CURSOR can be assigned to other REF CURSOR variables.

What is ref cursor example?

How do I see ref cursor output in Toad?

Here I am giving the steps the way you can see the results…

1. Open the package or procedure in Stored program editor.
2. It opens the Execution console.
3. Then it opens the entry point for the cursor.
4. Now click on the right extreme browse button then you can see the results in the data grid as a separate window.

What is the difference between ref cursor and Sys_refcursor in Oracle?

There is no difference between using a type declared as REF CURSOR and using SYS_REFCURSOR , because SYS_REFCURSOR is defined in the STANDARD package as a REF CURSOR in the same way that we declared the type ref_cursor . type sys_refcursor is ref cursor; SYS_REFCURSOR was introduced in Oracle 9i.

What is the use of ref cursor?

Using REF CURSOR s is one of the most powerful, flexible, and scalable ways to return query results from an Oracle Database to a client application. A REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database.

How do you declare a ref cursor?

To declare a cursor variable, you use the REF CURSOR is the data type. PL/SQL has two forms of REF CURSOR typeS: strong typed and weak typed REF CURSOR . The following shows an example of a strong REF CURSOR .

What is ref cursor and its typeS?

What is the SYS weak REF CURSOR variable?

The SYS_REFCURSOR cursor variable is an Oracle-defined weak Ref-Cursor type, which is pre-declared in the STANDARD package. We are free to use this Ref-Cursor type as parameters for our sub-routines and return type for the functions without needing to create them in a package specification, as it is already done by Oracle for us.

When is a REF CURSOR defined without a return type?

When a Ref-Cursor is defined without a return type, it is called as a weakly typed dynamic Ref-Cursor. There is no dependency on its return structure, thus making it open to all SELECT statements independent of its structure.

Which is better strong or weak CURSOR type?

Advantage of Weak cursor type over Strong type: Weak cursor type is more flexible than the strong type because they can be used with any query and with any ROWTYPE structure. But it does not provide compile time verification whether correct type of record has been used for fetch cursor or not.

Which is a limitation of a strong REF CURSOR?

The strong ref cursors have a limitation that they have fixed return type which can only be a record datatype. However fixed return type makes a strong ref cursor less error prone in the application development.