Ref kurzor vo oracle

12/01/2019

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. 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. The structure of the TO_REFCURSOR function defined in the DBMS_SQL package is shown below, DBMS_SQL.TO_REFCURSOR (ip_i_cursor_id IN INTEGER) 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.

11.06.2021 Ref kurzor vo 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. This section discusses the following aspects of using the REF CURSOR data type and OracleRefCursor objects: A ref cursor cannot be; it must be local in scope to a block of PL/SQL code.

How about using that Oracle procedure on the Oracle side, insert the output to a staging table then let SSIS move the content of that staging table to the SQL Server side? Johnathon Wilde (6/21/2010)

But it is going to have a bunch of other downsides not the least of which is memory usage. Leverage the power of ref cursors and ODP.NET to create powerful, flexible, and scalable applications. There are several ways to return query results from an Oracle database to a client application, using Oracle Data Provider for .NET; one of the most powerful, flexible, and scalable methods is to use ref cursor. The SYS_REFCURSOR cursor variable is an Oracle-defined weak Ref-Cursor type, which is pre-declared in the STANDARD package.

Reference cursors are specific to oracle, it is mostly used to output an unstructured cursor dataset from a stored procedure or to exchange data between stored procedures, when it comes to SQL Server the stored procedures automatically outputs the data for more info click here, if you would like to exchange the data between stored procedures look below for example

Section 27.8.4 How to Create a View Object on a REF CURSOR has a good explanation of creating a VO directly from a REF cursor, with sample code. You can see in here, and in my paper, a general example of how to Aug 06, 2015 · Conclusion :- SYS_REFCURSOR is just a synonym for the REF CURSOR type.SYS_REFCURSOR has been created as part of standard package just to discourage boiler plate coding (in above created procedure get_employees_name- SYS_REFCURSOR used as cursor type other wise we would have to create a cursor type and use it, assume you have 100 similar procedure or function).Thanks Oracle for saving us from Reference cursors are specific to oracle, it is mostly used to output an unstructured cursor dataset from a stored procedure or to exchange data between stored procedures, when it comes to SQL Server the stored procedures automatically outputs the data for more info click here, if you would like to exchange the data between stored procedures look below for example Ref Cursor can be passed/returned to another PL/SQL routine (function or procedure) or even can be returned to client from the Oracle Database Server. Ref Cursors can be further categorized in 2 parts 1) Strongly Typed Ref Cursor 2) Weakly Typed Ref Cursor When a return type is included while defining Ref Cursor it called Strongly Typed Ref The remaining usage like opening the cursor, selecting into the cursor and closing the cursor is the same across both the cursor types. For the rest of this chapter our examples will primarily be making use of the SYS_REFCURSOR cursors. All you need to change in the examples to make them work for user defined REF CURSOR s is the declaration A cursor is a pointer to a result set for a query.

Difference between cursor and a ref cursor Hi Tom, Feels good that i got a chance to ask you a question. I attended an interview for oracle pl/sql. There he asked one question as what is the difference between cursor and ref cursor, and when would you appropriately use each of these.

REF Cursor is basically a data type. It is normally declared as type r_cursor is REF CURSOR; REF cursor supports dynamic change of query. Normal cursor is a static cursor in which the query is assigned at design time and cant be changed at run time. What is the difference between REF Cursor & Normal Cursor in oracle?

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. 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.

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. Nov 23, 2007 · First of all, let me point you at the Oracle® Application Development Framework Developer’s Guide For Forms/4GL Developers. Section 27.8.4 How to Create a View Object on a REF CURSOR has a good explanation of creating a VO directly from a REF cursor, with sample code. You can see in here, and in my paper, a general example of how to Aug 06, 2015 · Conclusion :- SYS_REFCURSOR is just a synonym for the REF CURSOR type.SYS_REFCURSOR has been created as part of standard package just to discourage boiler plate coding (in above created procedure get_employees_name- SYS_REFCURSOR used as cursor type other wise we would have to create a cursor type and use it, assume you have 100 similar procedure or function).Thanks Oracle for saving us from Reference cursors are specific to oracle, it is mostly used to output an unstructured cursor dataset from a stored procedure or to exchange data between stored procedures, when it comes to SQL Server the stored procedures automatically outputs the data for more info click here, if you would like to exchange the data between stored procedures look below for example Ref Cursor can be passed/returned to another PL/SQL routine (function or procedure) or even can be returned to client from the Oracle Database Server.

The ref cursor can be assigned to other ref cursor variables. This is a powerful capability in that the cursor can A cursor variable is, well, just that: a variable pointing back to a cursor/result set. Some really nice aspects of cursor variables, demonstrated in this package: you can associate a query with a cursor variable at runtime (useful with both static and dynamic SQL); you can pass the cursor variable as a parameter or function RETURN value (specifically: you can pass a cursor variable back to a Oracle minimized the need of creating a weak ref cursor by shipping SYS_REFCURSOR as a part of standard package since Oracle Database 9i though the option of creating one is still available. It is like a personal choice, if someone wants to create a weak ref cursor then they can.

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In essence, a REF CURSOR is a pointer or a handle to a result set on the database. REF CURSOR s are represented through the OracleRefCursor ODP.NET class. REF CURSOR s have the following characteristics: A REF CURSOR refers to a memory address on the database.

Programmers are allowed to create named context area to execute their DML operations to get more control over it. The explicit cursor should be defined in the declaration section of the PL/SQL block, and it is created for the 'SELECT' statement that needs to be used in the code. Oracle 12c introduced implicit statement results, and SQL*Plus and SQLcl display the contents of implicit statement results. DECLARE l_cursor SYS_REFCURSOR; BEGIN l_cursor := get_ref_cursor; DBMS_SQL.return_result(l_cursor); END; / PL/SQL procedure successfully completed.

12/01/2019

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. My recommendation on ref cursors: REF Cursor is basically a data type. It is normally declared as type r_cursor is REF CURSOR; REF cursor supports dynamic change of query. Normal cursor is a static cursor in which the query is assigned at design time and cant be changed at run time.

Its declaration will be located @ %ORACLE_HOME%/rdbms/admin/stdspec.sql.