Strong ref cursor in oracle with example
The output from this script is listed below. The Definitive Reference by Boobal Ganesan. Notice that the three variations on the record return type work correctly, while the scalar return type fails as expected.
Another possibility is to declare and define a Record Type object to be a container for your query results.
Strong PL/SQL Ref Cursors
Why can't we use strong ref cursor with dynamic SQL Statement? When c2 is assign the value of c1both variables point to the same cursor. Remember that c1 and c2 are variables that point to or reference the actual cursor.
The same basic example is shown below except, the output is generated by a local procedure. First, the body is pretty simple to understand. Get the authors, print the names, and close the cursor.
What is diff between strong and weak ref cursors
Second, you can pass cursor variables to procedures and functions, and functions can return the variables. Lastly, it can become confusing about when a cursor variable should be closed.
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If you find an error or have a suggestion for improving our content, we would appreciate your feedback. The alternative would be syntax like the following:.
strong ref cursor : ref cursor « Cursor « Oracle PL / SQL
The more direct way to create this translation program eliminates the collection entirely. You can implement an Adapter pattern if you use an OCI8 external programming language to read the cursor as a dynamic result set really only a multi-dimensional array of strings — or technically because the index is sparse a list.
If you like this, you should check out another wrapping technique here.
The Journalist template by Lucian E. Marin — Built for WordPress.REF CURSOR AND SYS_REFCURSOR IN ORACLE PL/SQL WITH EXAMPLE
A cursor variable is a pointer that distinguishes the current row in a resultset from a multi-row query. Cursor variables have several advantages over explicit cursors including:. Cursor variables can point to a variety of queries provided the queries have a suitable return type.
In contrast, explicit cursors are tied to individual queries. Cursor variables allow cursors to be opened independently of being processed. Cursor variables can be passed as parameters between application layers, as well as between server side components.
Cursor variables can be used to reduce client-server network traffic by allowing several cursors to be opened on the server in a single round trip.