What is ref cursor Oracle?

What is ref cursor Oracle?

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 the difference between ref cursor and Sys_refcursor?

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.

Is ref cursor PL SQL Oracle?

What are PL/SQL Ref Cursors in Oracle Database? Ref Cursor is an acronym of Reference to a Cursor. It is a PL/SQL datatype using which you can declare a special type of variable called Cursor Variable.

Do we need to close ref cursor in Oracle?

Hence you close a ref cursor after you fetch from it. If you lose your result set — that indicates you are not done with the ref cursor. just treat a ref cursor as you would any other cursor, close it after you are finished with it.

Why do we use cursors in Oracle?

Cursors are used when the user needs to update records in a singleton fashion or in a row by row manner, in a database table. The Data that is stored in the Cursor is called the Active Data Set. Oracle DBMS has another predefined area in the main memory Set, within which the cursors are opened.

Can we return cursor from function?

Is it possible to return cursor/results from function, which is defined this way? You cannot do this using a standalone function, you’ll need to create a table type and a table function.

What is REFCURSOR in Oracle?

The REF CURSOR is a data type in the Oracle PL/SQL language. It represents a cursor or a result set in Oracle Database. The OracleRefCursor object is a corresponding ODP.NET type for the REF CURSOR type.

What is use of a cursor variable in Oracle?

Cursor variables can be used to hold different values at run time. They can be used to pass query result sets between PL/SQL stored subprograms. return_type is a record type indicating the types of the select list that will eventually be returned by the cursor variable.

What is cursor variables or REF CURSOR?

A cursor variable is a variable of REF CURSOR data type which is a pointer to a data structure resource. It connects to query statement result, similar to the CURSOR data type.

What is Oracle SQL cursor?

The Cursor is a handle (name or a pointer) for the memory associated with a specific statement. A cursor is basically an Area alocated by Oracle for executing the Sql Statements. Oracle Uses an Implicit Cursor statement for a single row query and Explicit Cursor for a multi row query.