Set the value of an MBR (minimum bounding rectangle) type using a buffer of four double precision values. The values represent the xmin, ymin, xmax, and ymax coordinates that define the MBR.
Syntax
void FNC_MBRSetValue(GEO_HANDLE mbrHandle, double * mbrValue)
Syntax Elements
- mbrHandle
- A handle to an MBR type that is defined to be a return value for a UDF/UDM or an INOUT/OUT parameter to an external stored procedure.
- mbrValue
- A pointer to a buffer containing the four double precision values.
Usage Notes
FNC_MBRSetValue sets the value of an MBR type. A buffer mbrValue containing four double precision values is provided as input to the routine along with the MBR handle.
Example: Using FNC calls to set an MBR type value
The following function takes four double precision values as input, and returns an MBR value.
CREATE FUNCTION mbrUDF1(P0 DOUBLE PRECISION, P1 DOUBLE PRECISION,
P2 DOUBLE PRECISION, P3 DOUBLE PRECISION)
RETURNS MBR
NO SQL
PARAMETER STYLE SQL
DETERMINISTIC
LANGUAGE C
EXTERNAL NAME 'CS!mbrUDF1!mbrUDF1.c';
void mbrUDF1 (DOUBLE_PRECISON* p0,
DOUBLE_PRECISON* p1,
DOUBLE_PRECISON* p2,
DOUBLE_PRECISON* p3,
GEO_HANDLE* resultMBR,
int* indicator_p0,
int* indicator_p1,
int* indicator_p2,
int* indicator_p3,
int* indicator_Result,
char sqlstate[6],
SQL_TEXT extname[129],
SQL_TEXT specific_name[129],
SQL_TEXT error_message[257] )
{
double* mbrBuffer;
int returnSize;
int mbrBufferSize;
mbrBufferSize = 4 * SIZEOF_DOUBLE_PRECISION;
mbrBuffer = (double*)FNC_Malloc(mbrBufferSize);
/* Set the double precision values in the buffer */
mbrBuffer[0] = *p0;
mbrBuffer[1] = *p1;
mbrBuffer[2] = *p2;
mbrBuffer[3] = *p3;
/* Set the MBR value */
FNC_MBRSetValue(*resultMBR, mbrBuffer);
*indicator_Result = 0;
FNC_free(mbrBuffer);
}