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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. HCL OneDB™ includes many built-in extensions that are fully integrated in the database server. HCL OneDB™ 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 HCL OneDB™.
HCL OneDB™ extensions and DataBlade® modulesThese topics describe how to use built-in database extensions and separately installed DataBlade® modules.
Database Extensions User's GuideThe 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.
SUBSTR function The SUBSTR function provides the capability to return a portion of a large object.

SUBSTR function

The SUBSTR function provides the capability to return a portion of a large object.

The function returns a BLOB(32767) (for a BLOB) or VARCHAR (for a CLOB) value for the returned portion of the large object read by the function.

Syntax

lob_loc: An input argument of type BLOB(10M) or CLOB(10M) that specifies the large object locator of the large object to be read.
amount: An optional input argument of type INTEGER that specifies the number of bytes or characters to be returned. The default value is 32,767.
offset: An optional input argument of type INTEGER that specifies the position within the large object to begin returning data. The first byte or character is at position 1. The default value is 1.