pyLargeColumn: This takes a boolean value dictating whether or not the property's contents will be large. If this value is true, then a CLOB column will be produced when SchemaBuilder.optimizeProperty is called
pyColumnSize: On the two DB2 platforms, a size for a CLOB column is required. If optimizing a property (through SchemaBuilder) with pyLargeColumn as true on DB2, then this value will dictate the size to make the CLOB column. If this value is not set, then the default on DB2 will be 5M. This value is ignored for optimizing CLOB columns on any other platform, and the CLOB columns will not have an explicit size. If an insert attempts to exceed the max size of a CLOB column, an error will be thrown and the entry will not be saved.
When the above qualifiers have been set on the desired property, the call to SchemaBuilder.optimizeProperty will now optimzie that property using a CLOB column type.