DataBlade API Programmer's Manual
Chapter 2: Using DataBlade API Data Types

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To ensure portability across dissimilar hardware platforms, the DataBlade API provides a set of data types that correspond to some common Universal Server types. Informix recommends that you use these data types instead of the standard C data types to ensure portable applications.

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DataBlade API Type	Standard C or ESQL/C Type	SQL Type
mi_char	char
mi_char1	char	char1
mi_unsigned_char1	unsigned char
mi_wchar	uint2
mi_string	char
mi_lvarchar
mi_money	dec_t
mi_integer	int, long	integer
mi_int1	char
mi_int8	ifx_int8_t
mi_unsigned_int8	ifx_int8_t
mi_unsigned_integer
mi_smallint	short	smallint
mi_unsigned_smallint	uint2
mi_double_precision	double	double precision
mi_real	float	real
mi_interval	intrvl_t
mi_date	int
mi_datetime	dtime_t
mi_numeric	dec_t
mi_decimal	dec_t
mi_boolean		boolean
mi_pointer	void *

Use the mi_type_byvalue() function to determine whether a type is passed by value or by reference. By-value types must be 4 bytes or smaller.

Use the mi_pointer data type only for communications between user-defined server routines. You cannot pass this type between the database server and a client application. No input/output or send/receive support functions are provided for this data type.

DataBlade API Programmer's Manual, version 9.1
Copyright © 1998, Informix Software, Inc. All rights reserved.