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SQL programmingYou can use the HCL OneDB™ implementation of the SQL language to develop applications for HCL OneDB™ database servers.
Guide to SQL: ReferenceThe HCL OneDB™ Guide to SQL: Reference contains the reference information for the system catalog tables, data types, and environment variables of the HCL OneDB™ dialect of the SQL language, as implemented in HCL OneDB™. These topics also include information about the stores_demo, sales_demo, and superstore_demo databases that are included with HCL OneDB™.
Environment variablesVarious environment variables affect the functionality of your HCL OneDB™ products. You can set environment variables that identify your terminal, specify the location of your software and define other parameters.
Environment variables in HCL OneDB™ productsThe topics that follow discuss (in alphabetic order) environment variables that HCL OneDB™ database server products and their utilities use.
INFORMIXC environment variable (UNIX™)

INFORMIXC environment variable (UNIX)

The INFORMIXC environment variable specifies the filename or pathname of the C compiler to be used to compile files that generates. The setting takes effect only during the C compilation stage.

If INFORMIXC is not set, the default compiler on most systems is cc.

Tip: On Windows™, you pass either -mcc or -bcc options to the esql preprocessor to use either the Microsoft™ or Borland C compilers.

compiler: The file name of the C compiler.
pathname: The full path name of the C compiler.

For example, to specify the GNU C compiler, enter the following command:

setenv INFORMIXC gcc

Important: If you use gcc, be aware that the database server assumes that strings are writable, so you must compile by using the -fwritable-strings option. Failure to do so can produce unpredictable results, possibly including core dumps.