Blockchain: Where to Begin?

Blockchain symbolic representation

Blockchain is a technology that I hear about almost every day now. 

And yet I haven’t found the best place to learn about it – both its concepts and its implementation. With so many courses and books, where to begin?

Those of you who have learned about it and use it regularly – what resources did you use? What, if any, certifications are legitimate?

You may leave your thoughts in the comments, or tweet me: @deepinthecode.

Examining the TransactionObject in PowerBuilder During Update and Delete

PowerBuilder logo

During the upgrade of an application from Sybase PowerBuilder 6.5 to SAP PowerBuilder 12.6, I ran into a bug in the Update event that had me suspicious that the TransactionObject was somehow changing, causing the update to be directed toward a different database.

As it turns out, the bug was due to a trigger in the main database that was selecting data from another database. 

Even so, I learned about something quite valuable: the SQLPreview event. 

event sqlpreview
this.setsqlpreview(sqlsyntax)
end event

If you set a watch on sqlsyntax, you can see the SQL code associated with the data update.