INFORMIX
Informix-ESQL/C Programmer's Manual
Chapter 7: Working with INFORMIX-Universal Server Smart Large
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Reading and Writing Smart Large Objects on an Optical Disc

Within a table, rows that include smart-large-object data do not include the smart-large-object data in the row itself. Instead, the smart-large-object column contains the LO-pointer structure (see page 7-16). The LO-pointer structure can point to an sbpage in an sbspace or to a platter in an optical storage subsystem.

However, you can store smart large objects on optical disc only if this media is mounted as a UNIX file system and is write many (WMRM). The optical disc must contain the sbspaces for the smart large objects. Your application can use the ESQL/C API for smart large objects (which this chapter describes) to access the smart large objects on the mounted optical disc.

Universal Server does not provide support for a write-once-read-many (WORM) optical-storage subsystem as a location for smart large objects. However, it does support access to simple large objects (BYTE and TEXT) on WORM media. For more information, see "Reading and Writing Simple Large Objects to an Optical Disc".

For details about the optical subsystem of Universal Server, see the INFORMIX-Universal Server Administrator's Guide and the INFORMIX-OnLine/Optical User Manual.




Informix-ESQL/C Programmer's Manual, version 9.1
Copyright © 1998, Informix Software, Inc. All rights reserved.