How do you call a procedure with Ref cursor out parameter?
How do you call a procedure with Ref cursor out parameter?
6 Answers. create or replace procedure my_proc( p_rc OUT SYS_REFCURSOR ) as begin open p_rc for select 1 col1 from dual; end; / variable rc refcursor; exec my_proc( :rc ); print rc; will work in SQL*Plus or SQL Developer.
How can we call cursor in procedure?
To use cursors in SQL procedures, you need to do the following:
- Declare a cursor that defines a result set.
- Open the cursor to establish the result set.
- Fetch the data into local variables as needed from the cursor, one row at a time.
- Close the cursor when done.
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 meant by 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.
How to call Oracle stored procedure which returns REF CURSOR?
First problem is that i am not able to call that procedure. I am getting this error: “wrong number or types of arguments in call to ‘OBJECT_HIERARCHY'” And my second problem is that i don’t understand how am i gonna get that data when this procedure returns a ref cursor value?
How to use Ref cursors to return records?
The example below uses a ref cursor to return a subset of the records in the EMP table. The following procedure opens a query using a SYS_REFCURSOR output parameter. Notice the cursor is not closed in the procedure. It is up to the calling code to manage the cursor once it has been opened.
Which is an example of a REF CURSOR in SQL?
PL/SQL Ref Cursors examples. 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.
How are ref cursors used in Oracle 9i?
Oracle 9i introduced the predefined SYS_REFCURSOR type, meaning we no longer have to define our own REF CURSOR types. Related articles. Implicit Statement Results in Oracle Database 12c Release 1 (12.1) The example below uses a ref cursor to return a subset of the records in the EMP table.
How do I assign a value to a ref cursor?
PL/SQL Cursor Variables with REF CURSOR
- DECLARE TYPE customer_t IS REF CURSOR RETURN customers%ROWTYPE; c_customer customer_t;
- DECLARE TYPE customer_t IS REF CURSOR; c_customer customer_t;
- DECLARE c_customer SYS_REFCURSOR;
What is ref cursor in Oracle stored procedure?
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 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 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).
What is the difference between cursor and ref cursor?
What is ref cursor example?
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 and its types?
How to test oracle stored procedure with REF CURSOR from?
Oracle stored procedure is one kind of PL/SQL program unit. Consider the following cases : 1. stored procedure with scalar type – NUMBER, VARCHAR 2. stored procedure with REF CURSOR or SYS_REFCURSOR. What is difference between REF CURSOR and SYS_REFCURSOR?
Using Ref Cursors. The example below uses a ref cursor to return a subset of the records in the EMP table. The following procedure opens a query using a SYS_REFCURSOR output parameter. Notice the cursor is not closed in the procedure. It is up to the calling code to manage the cursor once it has been opened.
How to Change ref cursors in SQL Server?
In the Server Explorer, right-click the package HR_DATA, and select Edit Package Body. The code for the package appears. Scroll down to the body of the GETCURSORS procedure, and after BEGIN, replace the line NULL; with the following code: Save the changes to the package.
Since Oracle 7.3 the REF CURSOR type has been available to allow recordsets to be returned from stored procedures and functions. Oracle 9i introduced the predefined SYS_REFCURSOR type, meaning we no longer have to define our own REF CURSOR types. Related articles.