The SQL data types specific to HCL Informix® are
available to a column in the Informix database.
The Informix Guide to SQL:
Reference describes
these data types. If you do not include the -xopen option when
you compile your Informix ESQL/C program,
the DESCRIBE statement uses these data types to specify the data type
of a column or the return value of a user-defined function. Constants
for these Informix SQL
data types are defined in the Informix ESQL/Csqltypes.h header
file.
The following figure shows some of the SQL data type
entries in sqltypes.h. Figure 1: Some Informix SQL
data type constants