Updating typed datasets

29-May-2017 00:40 by 4 Comments

Updating typed datasets

Programmers utilize various access methods (such as QSAM or VSAM) in programs for reading and writing data sets.

Use of this term began with OS/360 and is still used by its successors, including the current z/OS.

The dataset is an integral part of Microsoft’s new data access model ADO. It introduces a simple offline method for retrieving and updating data.

Before using the dataset, you should have an understanding of the Microsoft .

In good object-oriented design, the data and the methods used on the data should be encapsulated. NET 1.0 and 1.1, users had to pass the dataset to business components to perform certain functions.

There are a few limitations to this strategy, since the data and the methods that work on the data are not encapsulated as a single, logical unit.

It can have tables, rows, constraints and relationships between tables.

Though the dataset is capable of handling relational data efficiently, it fails if you try to extend its capabilities.They are most often used for storing multiple JCL files, utility control statements and executable modules.An improvement of this scheme is a Partitioned Data Set Extended (PDSE or PDS/E, sometimes just libraries) introduced with MVS/XA system.This mechanism eliminates the need for using any "delimiter" byte value to separate records.Thus data can be of any type, including binary integers, floating point, or characters, without introducing a false end-of-record condition.Whenever a member is deleted, the space it occupied is unusable for storing other data.