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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.
Hierarchical data typeThe node data type helps to resolve a difficult relational database problem–transitive closure.
Node data type functionsUse these functions in queries involving the node data type.
Length() Node function

Length() Node function

The Length( ) function returns the number of levels in the specified node and is equivalent to the Depth() function. This is the name of the function that was included in Node Version 1.0 and supported for continuity.

Returns: integer

Syntax

Length(node::node)

node: The node for which you want to determine depth, which is how many levels are in the node.

Example

execute function length('1.22.3'::node); 
(expression)  3

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