Welcome
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
System administration
These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
DB-Access User's Guide
The HCL® Informix® DB-Access User's Guide describes how to use the utility to access, modify, and retrieve information from HCL Informix database servers.
The full-screen menu interface
The full-screen menu interface guides you through running SQL statements.
The Query-language option
Use the Query-language option to enter, modify, save, retrieve, and run SQL statements. retains the statements, if any, in the editor. These statements are called the current statements.
What happens when errors occur
If you make any syntax or typing mistakes in an SQL statement, does not process the statement. Instead, it continues to display the text of the statement with a message that describes the error.

HCL Informix® V15.0.0 documentation
Welcome to the documentation for HCL Informix® 15.0.0 and related client tools and products.
Product overview
HCL Informix® is a fast and scalable database server that manages traditional relational, object-relational, and dimensional databases. Its small footprint and self-managing capabilities are suited to embedded data-management solutions.
Installing
These topics describe how to install HCL Informix® database servers, client products, and modules.
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
- System administration
  These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
  - List of utilities
    HCL Informix® includes utilities and applications that you can use to perform administrative tasks and capture information about configuration and performance.
  - Administrator's Guide
    The HCL® Informix® Administrator's Guide provides the information required to administer HCL Informix.
  - Administrator's Reference
    The HCL® Informix® Administrator's Reference includes comprehensive descriptions of HCL Informix configuration parameters, the system-monitoring interface (SMI) tables in the sysmaster database, the syntax of database server utilities such as onmode and onstat, logical-log records, disk structures, event alarms, and unnumbered error messages.
  - DB-Access User's Guide
    The HCL® Informix® DB-Access User's Guide describes how to use the utility to access, modify, and retrieve information from HCL Informix database servers.
    - Getting started with DB-Access
      provides a menu-driven interface for entering, running, and debugging Structured Query Language (SQL) statements and Stored Procedure Language (SPL) routines. You can also run interactively from the command line.
    - The full-screen menu interface
      The full-screen menu interface guides you through running SQL statements.
      - The Query-language option
        Use the Query-language option to enter, modify, save, retrieve, and run SQL statements. retains the statements, if any, in the editor. These statements are called the current statements.
        SQL editor
        When you choose the New of Modify option, you see the SQL editor. You can type as many lines of text as you need. You are not limited by the size of the screen, although you might be limited by the memory constraints of your system. If you do not use the Save option to save your typed statements, they are deleted when you select an option that clears the SQL editor (such as New or Choose).
        A system editor
        When you want to enter or modify a long SQL statement or series of statements, you might prefer the flexibility and familiarity of a system editor to the SQL editor. Select the Use-editor option from the SQL menu to use the system editor.
        Statements that the Run option supports
        After you exit the editor screen, the SQL menu reopens with the Run option highlighted and the statement text is displayed in the bottom of the screen. You can run most SQL statements with the Run option.
        Redirect query results
        The output from a SELECT statement is normally displayed on the screen. You can use the Output option on the SQL menu to route query results to the printer, store them in a system file, or pipe them to a program. The Output option has the same result as the OUTPUT statement of SQL.
        Choose an existing SQL statement
        Save the current SQL statement
        You can save SQL statements in a file for later use, such as to run the statements from the command line or retrieve the saved statements with the Choose option on the SQL menu.
        Support for SPL Routines
        What happens when errors occur
        If you make any syntax or typing mistakes in an SQL statement, does not process the statement. Instead, it continues to display the text of the statement with a message that describes the error.
      - The Database option
        Use the Database option to work with databases and transactions.
      - The Table option
        Use the Table option to work with tables.
      - The Connection and Session options
        Use the Connection option if you want to connect to a specific database server and database or explicitly disconnect from the current database environment. Use the Session option to display information about the current session.
    - Appendixes
  - High-Performance Loader User's Guide
    The describes how to use the HCL Informix® to load and unload large quantities of data efficiently to or from Informix databases.
  - Performance Guide
    The HCL® Informix® Performance Guide describes how to configure and operate your HCL Informix database server to improve overall system throughput and to improve the performance of SQL queries.
  - SNMP Subagent Guide
    The describes the Simple Network Management Protocol (SNMP) and the software that you need to use SNMP to monitor and manage HCL Informix® database servers and databases.
- Backup and Restore Guide
  The HCL® Informix® Backup and Restore Guide describes how to use the HCL Informix and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
- Enterprise Replication
  The describes the concepts of data replication using HCL Informix® Enterprise Replication, including how to design your replication system, as well as administer and manage data replication throughout your enterprise.
Migrating and upgrading
You can upgrade to the 15.0.0 release of HCL Informix® or migrate from other database servers to Informix. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the Informix database server can affect upgrading from a previous release.
Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
Embedding Informix®
When you embed HCL Informix®, you can use enterprise-class high-availability and high performance with embeddability features such as easy programmability, a small disk and memory footprint, and silent deployment.
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 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.
Data warehousing
In addition to designing and implementing Informix® dimensional databases, you can use tools to create data warehouse applications and optimize your data warehouse queries.
Designing databases
The first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
JSON compatibility
You can use the popular JSON-oriented query language created by MongoDB to interact with data stored in HCL Informix®.
Security
You can secure your Informix® database server and the data that is stored in your Informix databases. You can encrypt data, secure connections, control user privileges and access, and audit data security.
SQL programming
You can use the HCL Informix® implementation of the SQL language to develop applications for Informix database servers.
Troubleshooting HCL Informix®
Several troubleshooting techniques, tools, and resources are available for resolving problems that you encounter in your HCL Informix® database server environment.

What happens when errors occur

If you make any syntax or typing mistakes in an SQL statement, does not process the statement. Instead, it continues to display the text of the statement with a message that describes the error.

If an execution or runtime error occurs, continues to process the statement and returns an error message. For example, if you try to create a table that was already created, the following message is displayed at the bottom of the screen:

310: Table (mavis.mystock) already exists in database.

If you try to run a statement that contains more than one SQL statement, you might not see an error message immediately. If, for example, the first statement is a SELECT statement that runs correctly and the next statement contains a typing error, the data that the first statement retrieved shows on the screen before the error message is displayed for the second statement.

When detects an error, processing stops and the Modify option on the SQL menu is highlighted. Select one of the following methods to correct the statement:

Press Enter to choose Modify, which returns you to the SQL editor.
Select the Use-editor option to use the default editor of your choice.