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Extending HCL OneDB™Beyond standard relational database objects, HCL OneDB™ can be extended to handle specialized data types, access methods, routines, and other objects. Informix® includes many built-in extensions that are fully integrated in the database server. Informix® also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for Informix®.
HCL OneDB™ extensions and DataBlade® modulesThese topics describe how to use built-in database extensions and separately installed DataBlade® modules.
Database Extensions User's GuideThis publication explains how to use the database extensions that come with HCL OneDB™: Large Object Locator, MQ messaging, binary data types, basic text search, node data type, and SQL packages.The HCL® OneDB® Database Extensions User's Guide explains how to use the database extensions that come with HCL OneDB™: Large Object Locator, MQ messaging, binary data types, basic text search, node data type, HCL OneDB™ web feature service for Geospatial Data, and SQL packages.
SQL Packages ExtensionThe SQL packages extension provides SPL routines that you can use in an application that is compatible with database servers other than HCL OneDB™.
DBMS_LOB packageThe DBMS_LOB package provides the capability to operate on large objects.
ERASE procedures The ERASE procedures provide the capability to erase a portion of a large object.

ERASE procedures

The ERASE procedures provide the capability to erase a portion of a large object.

To erase a large object means to replace the specified portion with zero-byte fillers for BLOBs or with spaces for CLOBs. The actual size of the large object is not altered.

Syntax

ERASE_BLOB(lob_loc,amount [ ,offset ] )

ERASE_CLOB(lob_loc,amount [ ,offset ] )

Parameters

lob_loc: An input or output argument of type BLOB(10M) or CLOB(10M) that specifies the large object locator of the large object to be erased.
amount: An input or output argument of type INTEGER that specifies the number of bytes or characters to be erased.
offset: An optional input argument of type INTEGER that specifies the position in the large object where erasing is to begin. The first byte or character is at position 1. The default is 1.