Getting Started with DB2 Express-C

164 Getting Started with DB2 Express-C
If you prefer to work from the Control Center, you can launch the IMPORT utility by
selecting any table, right-clicking on it, and choosing the Import option as shown in Figure
9.3
Figure 9.3 – Launching the IMPORT dialog
9.3 LOAD utility
The LOAD utility is a faster way to load data from a file into a table. As discussed before,
the LOAD utility does not go through the DB2 engine, therefore triggers are not activated,
the bufferpool is not used, and constraints can be enforced but only as a separate step.
On the other hand, a LOAD operation is faster than IMPORT as it is a low level data loader
directly accessing the data pages on disk. It works in three phases: LOAD, BUILD, and
DELETE.
The following example loads all the data from the IXF formatted file employee.ixf into
the table employee_copy. The REPLACE option is one of the many options available with
LOAD. In this case it is used to REPLACE all of the contents of the employee_copy table.
LOAD FROM employee.ixf OF IXF
REPLACE INTO employee_copy
After executing the above command, the table space where your table resides may have
been placed in CHECK PENDING state. This means you need to run the SET INTEGRITY
command to check the consistency of your data. The following example shows you how:
SET INTEGRITY FOR employee_copy