CICS VSAM Transparency for z/OS, Version 1.2


IOAREA building in CICS VT

CICS® VT optimizes IO area building by grouping fields together and processing them as a single field.

For example, assume you have a file whose fields map to DB2® columns with the equivalent DB2 column types (signed packed decimal to DEC, PIC 9 and PIC X to CHAR). Additionally, the field positions within your VSAM record correspond to the positions of the columns within your DB2 table. In this case, data transformation is not required and CICS VT builds the appropriate DB2 and VSAM fields in a single operation.

If a field is being transformed by CICS VT, such as a packed decimal field mapped to a DB2 DATE column, or an unsigned packed decimal field to a DEC column, multiple build operations are performed.



Concept topic


Last updated: May 25, 2012 20:46:2