Macro Support for Large Objects
You can use BLOB and CLOB columns in macros as long as they do not violate the restrictions
on large object use with SQL.
These restrictions are named in the following bulleted list:
You cannot create a base table with more than 32 LOB columns, nor can you alter a
base table to have more than 32 LOB columns.
You can increase the maximum size of a LOB column up to the system limit, but you
cannot decrease the maximum size of an existing LOB column.
LOB columns can only carry the following attributes:
LOB columns cannot be a component of any index.
A base table containing LOB columns must have at least one non‑LOB column to act as
its primary index.
The first column specified in a base table definition cannot be a LOB unless a uniqueness
constraint is defined on some non‑LOB column set in that table.
The uniqueness of a SET base table must be defined on the basis its non‑LOB column
set because LOB columns cannot be used to specify row uniqueness.
You cannot define integrity constraints on LOB columns, nor can you define integrity
constraints that reference LOB columns.
LOB columns can be components of a view subject to the restrictions provided in this
list and the semantics of view definitions.
LOB columns can be parameters of a user‑defined function.
For more information, see SQL Data Types and Literals.