Install IBM Informix and create a database - database configuration/design tasks

Install the IBM® Informix® database software (IDS for example) on your database server.
Install the IBM Informix Software Development Kit (SDK) on your application server.
With some IBM Informix distributions (IDS 11), this package is included in the server bundle. it is recommended that you check the IBM web site for SDK upgrades or patches. Genero BDL is certified with IBM Informix SDK version 3.70 or higher.
Setup the IDS server (onconfig file, etc)
1. Starting with IDS version 11, the TEMPTAB_NOLOG is set to 1 by default.
  Consider setting the TEMPTAB_NOLOG parameter to 0, if you want to log temporary table changes. This can affect the behavior of programs expecting that a ROLLBACK WORK cancels changes done on a temporary table.
2. Starting with IDS version 11, by default the precision of SQL statement timing is the second (USEOSTIME is 0). For example, CURRENT HOUR TO FRACTION(3) returns a fraction part of zero.
  If sub-second precision is required, set the USEOSTIME configuration parameter to 1.
Define a database user dedicated to your application: the application administrator.
This user will manage the database schema of the application (all tables will be owned by this user). With IBM Informix, database users reference Operating System users, and must be part of the IBM Informix group. See IBM Informix documentation.
Connect to the server as the "informix" user (for example with the dbaccess tool) and give all requested database administrator privileges to the application administrator.
```
GRANT CONNECT TO appadmin;
GRANT RESOURCE TO appadmin;
GRANT DBA TO appadmin; 
```
Login as the application administrator (appadmin), and setup the Informix client environment.
Define the client and database locale.
The Informix environment variables defining locale settings are:
- CLIENT_LOCALE: defines the locale of the client application.
- DB_LOCALE: defines the locale of the database (matters at DB creation!)
- SERVER_LOCALE: defines the locale to be used by the server to interact with the OS file system.
Important: Always define the DB_LOCALE environment variable, before executing the CREATE DATABASE statement: If DB_LOCALE is not set, it will default to the DB_LOCALE value set when starting the Informix engine. If no DB_LOCALE was set when starting the engine, it defaults to en_us.8859-1 (i.e. en_us.819).
Create a database entity, for example with the following SQL statement:
```
CREATE DATABASE dbname WITH BUFFERED LOG;
```
Tip: To check the locale of an Informix database, connect to the sysmaster database, and run the following query:
```
$ dbaccess sysmaster -
Database selected.

> SELECT * FROM sysdbslocale WHERE dbs_dbsname = 'mydb'; 
dbs_dbsname  mydb
dbs_collate  en_US.819
```
The charset code for ISO-8859-1 is 819, for UTF8 it is 57372.
Tip: To check the value of the SQL_LOGICAL_CHAR size multiplier of an existing database, connect to that database (not to sysmaster!), and execute the following query:
```
$ dbaccess mydb -
Database selected.

> SELECT MOD(flags,4)+1 FROM systables WHERE tabname = ' VERSION';
      4
```
Create the application tables.