Can ref cursor be used for dynamic queries?
Answer: Here is an example script that performs dynamic SQL and returns the data as a ref cursor. …
How do I see ref cursor results in SQL Developer?
Using the PRINT command in a SQL Worksheet Using the classic SQL*PLUS PRINT command to view the refcursor output will work in SQL Developer just like it would work in your command line tools. You execute your program, you create a local variable or 3 to ‘catch’ said output, and then you PRINT it.
Can we use dynamic SQL in cursor?
A cursor will only accept a select statement, so if the SQL really needs to be dynamic make the declare cursor part of the statement you are executing. For the below to work your server will have to be using global cursors.
What is dynamic cursor in Oracle?
It supports for only value,in the way you used.. You need to specify it like IN (var1, var2) ; Without knowing you , you have used bind variables. One workaround is use REFCURSOR By forming a query string dynamically. DECLARE VAR1 VARCHAR2(500); CUR1 SYs_REFCURSOR; QUERY_STRING VARCHAR2(2000) := ‘SELECT T.
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 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 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 ref cursor and Sys_refcursor in Oracle?
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.
What is Dynamic SQL example?
For example, dynamic SQL lets you create a procedure that operates on a table whose name is not known until runtime. In past releases of Oracle, the only way to implement dynamic SQL in a PL/SQL application was by using the DBMS_SQL package.
What is a dynamic cursor?
Dynamic cursors detect all changes made to the rows in the result set, regardless of whether the changes occur from inside the cursor or by other users outside the cursor. The dynamic cursor can detect any changes made to the rows, order, and values in the result set after the cursor is opened.
Can we use execute immediate cursor?
The EXECUTE IMMEDIATE option allows you to define a select loop to process the results of the select. Select loops do not allow the program to issue any other SQL statements while the loop is open. If the program must access the database while processing rows, use the cursor option.
What is ref cursor and its types?
How to view REFCURSOR output in SQL Developer?
Updated Feb 5, 2021 There are two ways you can view your REFCURSOR output from calling PL/SQL stored procedures and functions in Oracle SQL Developer. Using the PRINT command in a SQL Worksheet Using the classic SQL*PLUS PRINT command to view the refcursor output will work in SQL Developer just like it would work in
Is it possible to have a PL / SQL procedure that uses a REF CURSOR?
Question: Is it possible to have a PL/SQL procedure that has dynamic SQL and uses a ref cursor? Can you show an example of a ref cursor with dynamic SQL? Answer: Here is an example script that performs dynamic SQL and returns the data as a ref cursor. The best on site ” Oracle training classes ” are just a phone call away!
How to bind cursor variable in dynamic SQL?
Use an OPEN FOR statement to associate a cursor variable with the dynamic SQL statement. In the USING clause of the OPEN FOR statement, specify a bind variable for each placeholder in the dynamic SQL statement. The USING clause cannot contain the literal NULL.
How does the DBMS _ sql.return _ result function work?
The DBMS_SQL.RETURN_RESULT procedure lets a stored subprogram return a query result implicitly to either the client program (which invokes the subprogram indirectly) or the immediate caller of the subprogram. After DBMS_SQL.RETURN_RESULT returns the result, only the recipient can access it.
