Error Handling Functions in Informix Programs

First published in the Washington Area Informix User Group Newsletter Volume 6, No. 2 – April 1996 This article defines some guidelines for error handling functions. An error handling function is the code that responds to a user or system generated error. There are two classes of errors: fatal errors and non-fatal errors. Events that […]

Informix 4GL Programming Tips

First published in the Washington Area Informix User Group Newsletter Volume 4, No. 3 – July 1994 1. Only select columns that you really need When you select data, it goes from disk to memory.  Ten un-needed bytes of data from 10,00 rows translates into reading 100,000 bytes unnecessarily.  Avoid “SELECT *” statements and only […]

Informix 4GL Application Error Logging

First published in the Washington Area Informix User Group Newsletter Volume 3, No. 4 – July 1993 In every major application that I have developed, a requirement has been to have some way of logging what is going on inside the program. There are three types of application logging I like to use. The first […]

ANSI Terminal Emulation and Informix 4GL Terminal Capabilities

First Published in the Washington Area Informix User Group Newsletter, Volume 3, No. 3 – May 1993 In the Q&A sessions at our user group meetings several questions have been asked about creating termcap entries for PCs using ansi terminal emulation software to work with Informix 4GL. The following is the ansi termcap entry I […]