The following table lists the data types for field values and the corresponding C and C++ data types. The values in the Format column of the record field tables have the types shown below in the Field column under Data type.

Table 5-5 List of summary rules

Data type		Byte	Description
Field	C and C++
char(n)	char( )	Number in parentheses	Character data of n bytes.
double	double	8	Numeric value (1.7E308 (15 digits))
long	long	4	Numeric value (-2,147,483,648 to 2,147,483,647)
string(n)	char[ ]	Number in parentheses	Character string of n bytes. Japanese Windows: Shift-JIS characters can be set. Simplified-Chinese Windows: GB18030 characters can be set#. Other Windows: Only 7-bit ASCII characters can be set. The last character is null.
time_t	unsigned long	4	Numeric value (0 to 4,294,967,295)
timeval	Structure	8	Numeric value (first 4 bytes are seconds, next 4 bytes are microseconds)
ulong	unsigned long	4	Numeric value (0 to 4,294,967,295)
utime	Structure	8	Numeric value (first 4 bytes are seconds, next 4 bytes are microseconds)
word	unsigned short	2	Numeric value (0 to 65,535)
(Not applicable)	unsigned char	1	Numeric value (0 to 255)

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In Simplified-Chinese Windows environment, database name of monitoring target SQL Server don't use out of range of GBK. If you use out of range of GBK in database name, PFM - RM for SQL Server collect performance data fail. In this case, "KAVL19812-E" is output by agent log error file (detail information: rc=0x80040e37, msg include "?").