Requesting Access to a Data Set

After your program is opened and a request parameter list is built, use the action request macros GET, PUT, ERASE, POINT, CHECK, and ENDREQ. Each request macro uses a request parameter list that defines the action to be taken. For example, when a GET macro points to a request parameter list that specifies synchronous, sequential retrieval, the next record in sequence is retrieved. When an ENDREQ macro points to a request parameter list, any current request (for example, a PUT) for that request parameter list finishes, and the resources held by the request parameter list are released.

The action request macros lets you do the following tasks:

Insert new records
Retrieve existing records
Point to existing records
Update existing records
Delete existing records
Write buffers
Retain buffers
Perform multistring processing
Perform concurrent requests
Access records using a path
Check for completion of asynchronous requests
End request processing