16.20 - FNC_MBRSetValue - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL External Routine Programming

Product
Advanced SQL Engine
Teradata Database
Release Number
16.20
Release Date
April 2020
Content Type
Programming Reference
Publication ID
B035-1147-162K
Language
English (United States)

Purpose

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)
GEO_HANDLE 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.
double* 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);
}