Examples of the Logical Unit of Work implementation

In general, there are three major forms of transaction data sources for transaction oriented application programs. These are:

• A sequential file;
• A Database or Table using a unique key of the Database or Table;
• A Database or Table using a non-unique key of the Database or Table.

Each of these requires certain considerations and adaptations when designing application programs.

The examples presented in this section use the COBOL Programming Language. Programmers of other languages should extrapolate from these examples for the techniques required. For language-specific syntax, see Using-API-mode.

This section contains the following topics: