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February 7, 2018
Issue Highlights
February 7, 2018 | Volume 16 Issue 19
- LEAD ARTICLE: Practical RPG: NULLs in DDS-Defined Files
- FEATURED ARTICLE: Gifts You Can Give the IBM i Community
- FEATURED ARTICLE: Make Your IBM i Database More User-Friendly
- NEWS HIGHLIGHT: New RPG & DB2 Summit Sessions Help IBM i Developers Achieve Big Goals
- WHITE PAPER: Node.js for Enterprise IBM i Modernization
- FEATURED VIDEO: Design an Invoice in 10 Minutes
- EVENT: TOMORROW - Powerful Cloud Strategies for IBM i CustomersPowerful Cloud Strategies for IBM i Customers
- MC PRESS MAGAZINE: A Small Intro to Big Data, Part 3: HFDS and the MapReduce Algorithm
Lead Article - Programming
Practical RPG: NULLs in DDS-Defined Files
DDL-defined tables are very good about handling null values, but sometimes we still need to deal with them in DDS-defined files as well; this article shows the RPG techniques required to do that.
By Joe Pluta
When you create a table in SQL using DDL statements, the default is to allow nulls, which means that, for any row, you can populate the column with a null value. Nulls have a number of specific characteristics; you can read about them here. We won't go into those issues in detail, although they can be quite interesting. The issue of nulls in WHERE clauses is particularly fascinating but not relevant to our discussion. Instead, today we're going to see how to support null result values in more-traditional RPG and DDS settings.
Industry News
IBM Quantum Computer Demonstrates Next Step Towards Moving Beyond Classical Supercomputing
Analytics & Cognitive News
IBM News
IBM Industry News
Feature Article - Programming
Gifts You Can Give the IBM i Community
This year, why not give a gift to others and contribute to the IBM i community?
By Brian May
It has been quite a while since I wrote about favorite gifts from IBM. A little over a year ago, I wrote gifts to give yourself. Now, in true trilogy form, because the best things come in threes, I am writing the last article in the gifts series. I guess that means I will need a new themed series.
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Feature Article - Programming
Make Your IBM i Database More User-Friendly
Here's how to create descriptive table and column names that make DB2 for i easier for end users to navigate
by Rafael Victoria-Pereira
Editor's note: This article is excerpted from chapter 4 of SQL for IBM i: A Database Modernization Guide, by Rafael Victoria-Pereira.
Chapter 3 led us on the first step toward a true database, but it kept most of the hallmarks that make a DB2/400 database very "user-unfriendly": the table and column names are short, in the typical and old-fashioned way of the AS/400. However, end users' demands in regard to data queries have evolved significantly in recent years. The users of our UMADB are particularly data-hungry and are overtaxing the university's IT staff labor resources. This added burden on the IT staff is something that often occurs when you "open up" the database to the end users. The problem is that the database is not always ready to be used by someone not used to short, cryptic names, and this ends up causing additional stress on the IT staff, because it requires additional time…
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