Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide

Large Object (LOB) support

Sample programs for LOB support

Binary Large Objects (BLOBs), Character Large Objects (CLOBs), and Double Byte Character Large Objects (DBCLOBs), along with the concepts of LOB LOCATORS and LOB FILES are recognized by the preprocessor. See the DB2 manuals for more information on these subjects.

LOBS, CLOBS, and BLOBS can be as large as 2,147,483,640 bytes long (2 Gigabytes - 8 bytes for PL/I overhead). Double Byte CLOBS can be 1,073,741,820 characters long (1 Gigabyte - 4 characters for PL/I overhead).

Note:
Under CMPAT(V1), the size of a BLOB, CLOB, or DBCLOB must not exceed 32767 KB.
Rational Developer for System z
PL/I for Windows, Version 8.0, Programming Guide