Use java.lang Methods as Functions with SQL-J

You can use methods of java.lang classes for all of the functions found built-in to other databases. For example, you can call the static method java.lang.Math.abs, which is similar to ABS in other database systems. You can call the method this way:

 SELECT (CLASS java.lang.Math).abs(balance) FROM account 

You can also define an alias for any static Java method, making it appear as a native built-in function. You use the CREATE METHOD ALIAS statement. Alias definitions are specific to a database; to use an alias when connected to a database, you must define the alias within that database. Once the aliases are defined, they are available to all connections.

 CREATE METHOD ALIAS ABS FOR java.lang.Math.abs 

After defining the alias, you can call the method this way:

 SELECT ABS(balance) FROM account
Share the Post:
Share on facebook
Share on twitter
Share on linkedin


The Latest

homes in the real estate industry

Exploring the Latest Tech Trends Impacting the Real Estate Industry

The real estate industry is changing thanks to the newest technological advancements. These new developments — from blockchain and AI to virtual reality and 3D printing — are poised to change how we buy and sell homes. Real estate brokers, buyers, sellers, wholesale real estate professionals, fix and flippers, and beyond may

man on floor with data

DevX Quick Guide to Data Ingestion

One of the biggest trends of the 21st century is the massive surge in internet usage. With major innovations such as smart technology, social media, and online shopping sites, the internet has become an essential part of everyday life for a large portion of the population. Due to this internet

payment via phone

7 Ways Technology Has Changed Traditional Payments

In today’s digital world, technology has changed how we make payments. From contactless cards to mobile wallets, it’s now easier to pay for goods and services without carrying cash or using a checkbook. This article will look at seven of the most significant ways technology has transformed traditional payment methods.