DB2 9 & 10 for z/OS Overview

Migration Planning WorkshopXML Restrictions and Limits• Following not supported if XML column exists– ALTER TABLE ADD PART, ROTATE PART, ALTER PART– NO MQT – cannot have XML as a result column• XML Table Space attributes are inherited from the base table, only some can be altered, e.g.:– Buffer Pool, STOGROUP, PCTFREE, GBPCACHE, Primary/Secondary Quantity, MAXROWS– Default Buffer Pool - ZParm• Stored documents may not maintain the exact copy as the original document– Due to whitespace stripping, default values, XML standard to handle line feeds• Parallelism– Parallelism will be disabled if SQL statement references any XML data type• XML type has no size limit, but– DB2 has an effective limit of 2 gigabytes (actually, 2GB-1) for serialized XML data• Stored Procedure and trigger transition variables cannot be of an XML type– Use CLOB and cast within the routine– Native SQL Procedure can have an XML data type variable65© 2011 IBM Corporation