Returned ref cursor not supported sql oracle ora00904. A ref cursor is a pl sql data type whose value is the memory address of a query work area on the database. Typically the ref cursor definition and the open for. Declare type empcurtyp is ref cursor return emp%rowtype. Plsql cursor variables with ref cursor oracle tutorial. However, you dont need this if you rightclick on a program unit and select test from the popup menu. Pl sql procedural language structured query language is oracle corporations procedural extension for sql and the oracle relational database. Ask tom plsql procedure returning a refcursor with. Another difference is that static sql not using a ref cursor is much more efficient then using ref cursors and that use of ref cursors should be limited to returning result sets to clients. Would you use java with a sql or a store procedure to return a ref cursor. A cursor variable is a pointer that distinguishes the current row in a resultset from a multirow query. And here is an example of a weak typed ref cursor declaration that is not. I had in the past releases is that ref cursors were not properly supported. Apr 16, 2020 pl sql cursor is basically a mechanism under which multiple rows of the data from the database are selected and then each row is individually processed inside a program.
Ask tom how to test a function returning a ref cursor from. To read more about ref cursor i have created a package to explain few different ref cursor examples. Building a strong data analytics platform architecture. In similar manner you can test any ref cursor within packageprocedurefunction. Developing plsql applications with oracle inmemory. What this means is in a plsql procedure you can cr. The return type of a function may also be a ref cursor type.
The pl sql package defines the ref cursor and contains the definition of the stored procedure that processes it. But in your example for anonymous block, you have given the begin and end statements. The problem now i am having is i have to return this as cursor. Oraoledb returns a rowset for the ref cursor bind variable.
This variable is then looped for processing the returned result set as shown in. I placed the spc just to show what my ref cur looks like and hopefully someone can show me the pl sql code to run in sql developer to output it. Returning a ref cursor from a procedure pl sql this example demonstrates how to define and open a ref cursor variable, and then pass it as a procedure parameter. Defining cursor variables ref cursor return clause.
If these are those procedures where the ref cursor is opened and control returns to calling program then only the calling procedure can know if data is returned or not. This is something that would be impossible to do in pl sql with a ref cursor in oracle database 10g and earlier releases, because pl sql would not and could not know the number of items in the select list. This example executes a pl sql stored procedure that returns a ref cursor parameter, and reads the value as an oracledatareader. In contrast, explicit cursors are tied to individual queries. How to call stored procedure using ref cursor in pl sql developer version 6 433234 nov 23, 2006 12. The ref cursor can be assigned to other ref cursor variables. A cursor variable has datatype ref cursor, and you. It takes a sql statement not a cursor, but a query in a string as input and produces a commadelimited file as output. The two ref cursors will return results to a web page, but wed. Using ref cursor in oracle sql developer stack overflow. You cannot update the database by using a ref cursor. The select statement is part of the open statement not the declaration so the same ref cursor can be reopened with different sql.
Test ref cursor in plsql developer allround automations. This example demonstrates how to define and open a ref cursor variable, and then pass it as a procedure parameter. How to test ref cursor oracle plsql technology blog. Used appropriately ref cursors can make your code more scalable and performant. Apr 30, 20 now you can see the ref cursor results in another window as shown below. The stored procedure logic is located in the pl sql package body and performs the bulk of the work, which, in this case, is simply to loop through the rows in the ref cursor and insert a simple message into the table. One of the considerations that you need to take into account is that the current version of odp. You cannot position a record pointer inside the ref cursor to point to random records in the result set. The issue i am having is that when i try to read the ref cursor i get errors. Implicit statement results in oracle database 12c release 1 12. 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. Oracle database tips by donald burlesonfebruary 17, 2015. Strong plsql ref cursors burleson oracle consulting. Ref cursor examples contains three examples that demonstrate using ref cursors.
Ask tom return values from a plsql table into a ref cursor. Retrieving data from multiple ref cursors using an oracledatareader. A query work area can be thought of as the result set, or a row set, on the server. Nov 20, 2006 why isnt case supported by pl sql in definition of cursor. Im trying to make a chart in a database dashboard reporting softwarelogi info. Strong ref cursors with table based record datatype.
A ref cursor type enables input and output streaming of data and is ideal for transferring large amounts of data to and from a pl sql code. Jan 22, 2016 in this tutorial, youll learn the types of ref cursors plsql procedural language structured query language is oracle corporations procedural extension for sql and the oracle relational. Ask tom how to return dynamic sql result in ref cursor. The example below uses a ref cursor to return a subset of the records in the emp table.
Jan 04, 2016 in this tutorial, youll learn what is ref cursors. Feb 26, 2017 this video explains about ref cursor in oracle plsql, what are ref cursors, how are ref cursor different from simple cursors, what are the advantages of using a ref cursor etc. The ref cursor is a data type in the oracle pl sql language. This video explains about ref cursor in oracle plsql, what are ref cursors, how are ref cursor different from simple cursors, what are the advantages of using a ref cursor etc. I thought i knew how to define a cursor variable in the test window so that i could look at the result set after the run, something like select into. Create a simple jrxml and in the query editor change the language type to plsql and call. This may be a dumb question, but ive never got my head round the strange tablecast. Arrays are supported involving the use of plsql collections. The refcursor variables do not support any operator testing, i. What i would like to do is create this procedure in the common schema and just call the procedure from b,c and d with the help of database link. Creating a plsql stored procedure that uses ref cursors.
A strong analytics platform is key to meeting demands in a datadriven business. Ora06504 ref cursor out tips burleson oracle consulting. It is known that a refcursor will not throw an no data found exception. Net type for the ref cursor type this section discusses the following aspects of using the ref cursor data type and oraclerefcursor objects obtaining an oraclerefcursor object. A strongtyped ref cursor has a return type defined when the ref cursor itself is declared in pl sql. Not sure if this is exactly what youre looking for but this is how i call a stored proc and view the output in sql developer. Weve got a procedure that returns two ref cursors, and wed. Pl sql procedural language structured query language is oracle corporations procedural extension for sql. No sql plus commands like print or slashes are allowed, just pl sql.
A ref cursor can shift its pointer from one sql to another at run time, unlike the explicit cursors, which makes the former the preferred one over the latter. Get ref cursor from function 6 loop 7 fetch c into v. A ref cursor is a variable, defined as a cursor type, which will point to, or reference a cursor result. You cannot define the same cursor more than stead you can only use it. I really like how oracle implemented this testing module in sql. Using ref cursors 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. If the pl sql stored procedure has one or more arguments of ref cursor type, oraoledb binds these arguments and returns a rowset for each argument of ref. The associated query can reference bind variables as well. First, it is important to note that a ref cursor is not a cursor, it is a pointer to a cursor, and the cursor, in turn, points to a pl sql collection array.
Cursor variables are cursors opened by a pl sql routine and fetched from by another application or pl sql routine the cursor variables are opened with the privileges of the owner of the procedure and behave just like they were completely contained within the pl sql routine. Because there is no predefined data type for ref cursor in the ole db specification, the consumer must not bind this parameter. A pl sql program unit that has no name and does not require the explicit presence of the begin and end keywords to enclose the executable statements. In this topic you will create, and run a stored package test which contains the following procedures. Cursor variables have several advantages over explicit cursors including. Spl supports the declaration of a cursor variable using both the. I placed the spc just to show what my ref cur looks like and hopefully someone can show me the plsql code to run in sql developer to output it. This example executes a pl sql stored procedure that returns two ref cursor parameters, and fills a dataset with the rows that are returned. Cursor variables advanced oracle plsql developers guide. Package functions are all implemented an run smoothly. The data represented by the ref cursor is accessed in a forwardonly, serial manner.
Returning a ref cursor from a procedure plsql this example demonstrates how to define and open a ref cursor variable, and then pass it as a procedure parameter. Cursor variables can point to a variety of queries provided the queries have a suitable return type. We will explore all the concepts of both these types of ref cursors in this series. A cursor variable is not tied to a single particular query like a static cursor. Ref cursor s are represented through the oraclerefcursor odp. Another difference is a ref cursor can be passed from subroutine to subroutine a cursor cannot be. You create and return a ref cursor inside a pl sql code block. Now id like to implement a pl sql package procedure, which returns a ref cursor to the resultset of the above query, but the pl sql parser encountered problems with the cursor function. Its been a few years since i have used it but below i think should describe it. Then how one should handle this situation when the data is not there and you want to raise no data found. Plsql procedural language structured query language is oracle corporations procedural extension for sql and the oracle relational database. This tutorial introduces you to plsql cursor variables and how to manage cursors.
Net type for the ref cursor type this section discusses the following aspects of using the ref cursor data type and oraclerefcursor objects. Weve got a procedure that returns two ref cursors, and wed like to figure out how to test them in pl sql developer 6. This section discusses the following aspects of using the ref cursor data type and oraclerefcursor objects. Cursor variables are available to every plsql client. If you have not previously saved the password, the oracle server login opens and you can. The op says they have defined a function which returns a ref cursor, and their posted sql call seems to substantiate this.
The ref cursor declared in this programs scope is never opened as when it is assigned to the same ref cursor s variable in the out parameter, the information of the cursor variable from the server program is copied into this variable, thus making it its alias. What is the difference between a normal cursor and a ref. The two ref cursors will return results to a web page, but wed like to test it before we build the page. As we learnt in the introduction to ref cursors that there are two types of pl sql ref cursors in oracle database strong ref cursors and. The cursor variable is specified as an in out parameter so that the result set is made available to the caller of the procedure. Operations on functions and procedures with ref cursor. Tim hall provides this example of using a pl sql ref cursor as an out variable and reading it with another pl sql program. A ref cursor is a plsql datatype whose value is the address of the memory location of a query work area on the database server. Cursor can be attached to only one query while ref cursor can be used to associate multiple queries at run time. The refcursor declared in this programs scope is never opened as when it is assigned to the same refcursors variable in the out parameter, the information of the cursor variable from the server program is copied into this variable, thus making it its alias.
It represents a cursor or a result set in oracle database. To try out pl sql stored procedures with entities, first update the app. After executing the test script, press the value button of the variable to open a window with the cursor result set. Test window and cursor variables allround automations. This example executes a pl sql stored procedure that returns two ref cursor parameters, and reads the values using an oracledatareader. A ref cursor is a plsql variable, defined as a cursor type, which will point to. Sql plus supports ref cursors in select statements without the need for variables at least in more recent versions. The ref cursor can be assigned to other ref cursor.