XMLModify function is introduced in DB2 10 for z/OS to do sub-document update, without reparsing the whole document. There is a big performance saving if the change is small when comparing to the size of the document.
Applications around Mobile devices are becoming increasingly important in large enterprises with requirement of storing JSON in database. This presentation will illustrate the JSON storage model and SQL APIs to manipulate JSON data.
We are getting back on track how to access and manipulate XML documents in DB2 for z/OS. But this time, with focus on more complex XML data manipulation techniques than just selecting/inserting/updating, or deleting the whole XML document.
Over the course of the past several releases of DB2 for z/OS, IBM has added many features and capabilities that are transforming the platform. This presentation takes a look at the big changes that have been introduced to DB2 including new SQL, universal table spaces, improved security, and more. Th
Tuning of SQL queries requires understanding why DB2 chose a particular access path and determining whether or not that access path should perform as expected. The key to this is understanding what filter factors are, how they are used by the Optimizer and how to get DB2 to better estimate them,