Ref kurzor vo oracle

09/01/2011

The memory address represented by a ref cursor "lives" on the database server, not on the client machine. Is it possible to use a ref_cursor with ORACLE WITH CLAUSE. For example, I have the following scenario. First I have a procedure which returns a ref_cursor. PROCEDURE p_return_cursor(p_id IN NUMBER, io_cursor OUT t_cursor) AS BEGIN OPEN io_cursor FOR SELECT col1, col2 FROM Table1 t WHERE t.id = p_id; END; A ref cursor being a pointer to an open cursor used to send an open cursor as an out argument to the client app to loop through the record. If you want to loop through then, SELECT * FROM TABLE (Oracle REF CURSOR) - Woodward Informatics Ltd SELECT * FROM TABLE (Oracle REF CURSOR) Below is the most trivial of C# applications that generates an enumerable anonymous class collection, and spits out the content to the console.

09.03.2021

What is the ref cursor in Oracle? REF_CURSOR allows returning a recordset/cursor from a Stored procedure. It is of 2 types: Strong REF_CURSOR: Returning columns with datatype and length need to be known at compile time. REF CURSOR and SYS_REFCURSOR type is used interchangeably in PL/SQL. SYS_REFCURSOR is predefined REF CURSOR defined in standard package of Oracle so that we need not to write code again and again 😊. Its declaration will be located @ %ORACLE_HOME%/rdbms/admin/stdspec.sql. REF Cursor is basically a data type.

A cursor is a pointer to a result set for a query. By returning a sys_refcursor you allow the client to fetch as many or few of the rows from the query as it requires. In stateful applications this could be used to page through results.

The following example shows you how to get a list from an SQL SELECT query which is located in a string and dynamically openend into a REF CURSOR. This TO_REFCURSOR function was added to the DBMS_SQL package in the Oracle release version 11 for converting a DBMS_SQL cursor ID into a weakly typed Ref-Cursor variable.

25/07/2020

It is of 2 types: May 12, 2006 · Oracle REF Cursor vs SYS_REFCURSOR. SYS_REFCURSOR is new in oracle 9i and is meant to replace having to write a package for each stored procedure as is required with Sys Ref cursor is an Oracle built in cursor variable. It declares a weak ref cursor and that too without declaring the ref pointer type. Mostly it is used as a generic cursor which can be passed as an argument to a stored sub program. Sep 28, 2011 · Since Oracle 11g there's a method called DBMS_SQL.TO_CURSOR_NUMBER(l_rcursor) which you can use to cast a ref cursor into a cursor and use dbms_sql.describe_columns.

However, ref cursors can help optimize Oracle data retrieval. One of the primary benefits of using PL/SQL is that it is tightly integrated with both Oracle Database and the SQL language. A ref cursor cannot be; it must be local in scope to a block of PL/SQL code. 6) A regular cursor can more efficiently retrieve data than ref cursor. A regular cursor can implicitly fetch 100 rows at a time if used with CURSOR FOR LOOP. A ref cursor must use explicit array fetching.

Before assigning a cursor variable, a cursor type must be defined. type author_cursor is ref cursor; This REF CURSORis a weak typed cursor variable because it does not define the datatype the cursor will return. Ref cursors have several important characteristics that must be taken into account for proper use with Oracle Data Provider for.NET in your code: A ref cursor refers to server memory. The memory address represented by a ref cursor "lives" on the database server, not on the client machine. Difference between cursor and a ref cursor Hi Tom, Feels good that i got a chance to ask you a question.

REF CURSOR s have the following characteristics: A REF CURSOR refers to a memory address on the database. With a cursor variable, you simply pass the reference to that 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.

Since Oracle 7.3 the REF CURSOR type has been available to allow recordsets to be returned from stored procedures and functions.

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28/03/2018

My recommendation on ref cursors: Use of ref cursors should be Using Ref Cursors To Return Recordsets. 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. Using Ref Cursors; 11g Updates; 12c Updates; Related articles. Oracle REF CURSOR With the REF_CURSOR you can return a recordset/cursor from a stored procedure. There are 2 basic types: Strong ref cursor and weak ref cursor For the strong ref cursor the returning columns with datatype and length need to be known at compile time. For the weak ref cursor the structure does not need to be known at compile time.

To execute a stored procedure that returns REF CURSORs, you must define the parameters in the OracleParameterCollection with an OracleType of Cursor and a Direction of Output. The data provider supports binding REF CURSORs as output parameters only. The provider does not support REF CURSORs as input parameters.

By returning a sys_refcursor you allow the client to fetch as many or few of the rows from the query as it requires. In stateful applications this could be used to page through results. SQL> CREATE OR REPLACE PROCEDURE 2 FETCH_EMPLOYEES_NAMES(V_DeptNo NUMBER, V_REF OUT SYS_REFCURSOR ) 3 /*Note: SYS_REFCURSOR as parameter type used here because it has been declared in standard package it is a ref cursor */ 4 IS 5 Begin 6 OPEN V_REF For Select FIRST_NAME, LAST_NAME From EMP_TEST where DEPTNO = V_DeptNo; 7 End FETCH_EMPLOYEES_NAMES; 8 / Procedure created.

However, there are some visible difference between them.The main agenda of this post is to understand how they are different so that they can be used appropriately.