by Robert | Dec 31, 2020 | Uncategorized
For many years, DBAs at a lot of Db2 for z/OS sites have been challenged in performing an important operational task: rebinding a frequently executed package. This can be tricky because a package cannot be rebound while it is in use, and if a package is executed with...
by Robert | Nov 24, 2020 | Uncategorized
The EXPLAIN functionality of Db2 for z/OS, by which the query optimizer's access path determinations are externalized, has been around as long as I can remember, and Db2 people, by and large, are familiar with the concept. In recent weeks, however, I discovered that...
by Robert | Oct 30, 2020 | Uncategorized
Last month, I posted to this blog an entry in which I provided my thoughts on the CHAR (fixed-length) versus the VARCHAR (varying-length) data type for character string columns in Db2 for z/OS tables. Soon after, I received a note from a longtime Db2 for z/OS DBA...
by Robert | Oct 26, 2020 | DB2 12
Sometimes, I assume that I’ve blogged about some Db2 for z/OS-related topic when in fact I have not. RPN table spaces is one such topic. In thinking about something to post this month, I briefly considered RPN table spaces and thought, “Nah. I’ve...
by Robert | Sep 30, 2020 | Uncategorized
Recently, I received from a Db2 for z/OS DBA a question: for a table column that will hold character string values, are there any recommendations concerning the use of CHAR (fixed-length) versus VARCHAR (variable-length) for the column's data type?That question has...
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