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Extending Informix®
Beyond standard relational database objects, HCL Informix® 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.
Informix® extensions and DataBlade® modules
These topics describe how to use built-in database extensions and separately installed DataBlade® modules.
Database Extensions User's Guide
The Informix® Database Extensions User's Guide explains how to use the database extensions that come with HCL Informix: Large Object Locator, MQ messaging, binary data types, basic text search, node data type, and SQL packages.
Basic Text Search
You can perform basic text searching for words and phrases in a document repository stored in a column of a table.
Basic text search performance
The performance of basic text search queries depends on the bts index, disk space, configuration parameters, and BTS virtual processors.
Adding BTS virtual processors to run multiple queries simultaneously
You can increase the number of basic text search queries or other index operations that can run at the same time by adding additional BTS virtual processors.

Extending Informix®
Beyond standard relational database objects, HCL Informix® 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.
- Informix® extensions and DataBlade® modules
  These topics describe how to use built-in database extensions and separately installed DataBlade® modules.
  - Database Extensions User's Guide
    The Informix® Database Extensions User's Guide explains how to use the database extensions that come with HCL Informix: Large Object Locator, MQ messaging, binary data types, basic text search, node data type, and SQL packages.
    - Large object management
      The Large Object Locator extension enables you to create a single consistent interface to large objects. It extends the concept of large objects to include data stored outside the database.
    - MQ Messaging
      WebSphere® MQ (WMQ) messaging products provide an infrastructure for distributed, asynchronous communication of data in a distributed, heterogeneous environment. The WMQ message queue allows you to easily exchange information across platforms.
    - Binary data types
      The binary18 and binaryvar data types allow you to store binary-encoded strings, which can be indexed for quick retrieval.
    - Basic Text Search
      You can perform basic text searching for words and phrases in a document repository stored in a column of a table.
      - Preparing for basic text searching
        Before you can perform basic text searching, you must prepare the server environment and create the bts index. Review the requirements and restrictions.
      - Basic text search queries
        You run basic text search queries with the bts_contains() search predicate.
      - Basic text search JSON index parameters
        You can include JSON index parameters when you create a bts index to control how JSON and BSON columns are indexed.
      - Basic Text Search XML index parameters
      - Basic text search analyzers
        A text analyzer prescribes how text is indexed.
      - Basic text search functions
        You can use basic text search functions to provide information about bts indexes, compact bts indexes, and configure tracing.
      - Basic text search performance
        The performance of basic text search queries depends on the bts index, disk space, configuration parameters, and BTS virtual processors.
        Disk space for the bts index
        The size of the external bts index depends on the number of documents being indexed as well as the number of words and the number of unique words in those documents.
        Adding BTS virtual processors to run multiple queries simultaneously
        You can increase the number of basic text search queries or other index operations that can run at the same time by adding additional BTS virtual processors.
        Tune configuration parameters for basic text searching
        You can optimize the performance of basic text searches by tuning certain configuration parameters.
      - Basic text search error codes
        Basic text searching has specific error messages.
    - Hierarchical data type
      The node data type helps to resolve a difficult relational database problem–transitive closure.
    - SQL Packages Extension
      The SQL packages extension provides SPL routines that you can use in an application that is compatible with database servers other than Informix®.
    - Regex pattern matching
      Regular expressions combine literal characters and metacharaters to define the search and replace criteria. You run the functions from the Informix® Regex extension to find matches to strings, replace strings, and split strings into substrings.
  - Performing XML Publishing
    The Informix® XML User's Guide includes information about using built-in functions for XML publishing with Informix.
  - Spatiotemporal Search for Moving Objects User's Guide
    The describes how to program applications to search data from moving objects in HCL Informix® databases using the spatiotemporal search extension.
  - TimeSeries Data User's Guide
    The Informix® TimeSeries Data User's Guide contains information to assist you in using the TimeSeries extension with HCL Informix.
  - Web DataBlade Module
    Use the Web DataBlade® module to create web applications that incorporate data that is retrieved dynamically from the HCL Informix® database.
- Creating extensions
  You can create user-defined data types, routines, access methods, and other database objects to suit your needs. You can use application programming interfaces to write user-defined routines and applications that access data in Informix® databases.

Adding BTS virtual processors to run multiple queries simultaneously

You can increase the number of basic text search queries or other index operations that can run at the same time by adding additional BTS virtual processors.

About this task

Each Basic Text Search function, including bts_contains(), runs in a BTS virtual processor without yielding. If basic text search queries are slow because multiple users are running queries at the same time, you can add more BTS virtual processors so that queries run simultaneously, each in their own virtual processor.

To dynamically add BTS virtual processors for the current database server session:

Procedure

Run the onmode -p command, specifying the number of virtual processors to add and the BTS virtual processor class. For example, the following command adds three BTS virtual processors:

onmode
-p 3 bts

Example

Alternatively, you can use the SQL administration API task() or admin() function with the onmode and p arguments to add BTS virtual processors.

To permanently increase the number of BTS virtual processors, set the value of the VPCLASS bts configuration parameter in the onconfig file and then restart the database server. If the onconfig file contains an existing entry for the VPCLASS bts configuration parameter, update that entry; otherwise, add a new entry for the VPCLASS bts configuration parameter.

For more information about the onmode utility or the SQL administration API, see the Informix® Administrator's Reference,