A fourth-generation programming language (4GL) is a high-level computer programming language that belongs to a class of languages envisioned as an advancement upon third-generation programming languages (3GL).

2024年10月4日 · A Fourth Generation (Programming) Language (4GL) is a grouping of programming languages that attempt to get closer than 3GLs to human language, a form of thinking, and conceptualization and are easier to use than 3GLs. It is a non-procedural language which means that the programmer defines what has to be done instead of how the task is to be ...

2024年10月1日 · Fourth-generation languages (4GL) are created to simplify programming by using syntax that is more similar to everyday human language. These languages allow users to focus on specifying what tasks need to be done, without needing to worry about the specific implementation details.

4GL Compiler Directives: DATABASE, DEFER, GLOBALS, WHENEVER; Storage Management: INITIALIZE, LET, LOCATE, VALIDATE; Screen I/O Language Constructs. The INFORMIX-4GL command set includes a collection of statements designed to …

ii IBM Informix 4GL by Example This document contains proprietary information of IBM. It is provided under a license agreement and is protected by copyright law. The information contained in this publication does not include any product warranties, and any statements provided in this manual should not be interpreted as such.

This chapter provided an introduction to 4GL coding, and explained some of 4GL's more unusual or confusing features. Take a look at Chapter 31 "Writing Re-usable 4GL Code", which talks about still more things that can make your code easier to work with -- and more likely to be able to be reused in multiple programs.

To get 4GL code examples, go to http://www.informix.com/idn and look for Example application, or download one of GNU 4GL programs from http://www.falout.com

2023年6月30日 · When an asynchronous request completes execution on the server, it sends a response to the client, which places it on the response queue for the appropriate server handle.

This is the top level book/outline node for some general ABL (formerly known as Progress 4GL) code samples. This includes code snippets, code examples, utility programs, tricks, techniques, and patterns.

Progress 4Gl ABL sample code!!! Now you can downlod the latest openEdge ABL on your own machine and start learning the language. The specification i am using is :