Home
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.
Excalibur Text Search DataBlade® Module User's GuideThese topics describe the module and how to access and use its components.
AdministrationThe purpose of this section is to make database administrators aware of configuration and performance issues related to the features of the module.
Choose the appropriate storage data typeYou can improve performance by choosing the appropriate storage data type for your data. This section describes the advantages and disadvantages of storing text documents in the following supported data types: BLOB, CLOB, LVARCHAR, IfxDocDesc, and IfxMRData.
The CLOB data typeThe CLOB data type are to be used for large documents that contain only standard ASCII text, such as HTML and SGML documents. A column of type CLOB can contain documents of unlimited size, since the data is stored in sbspaces.

The CLOB data type

The CLOB data type are to be used for large documents that contain only standard ASCII text, such as HTML and SGML documents. A column of type CLOB can contain documents of unlimited size, since the data is stored in sbspaces.

There is, however, a significant amount of resource overhead when you store documents in sbspaces. If your documents are smaller than 32 KB, you might consider storing them in a column of type LVARCHAR.

Tip: If your documents contain only standard ASCII text, but are a mixture of small (under 2 KB) and large (over 2 KB) sizes, consider using the IfxMRData data type.

Have feedback?
Google Analytics is used to store comments and ratings. To provide a comment or rating for a topic, click Accept All Cookies or Allow All in Cookie Preferences in the footer of this page.