16.20 - Example: Basic External Stored Procedure - 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)

Here is an example of a simple C function that takes an INOUT string argument, strips off the first four characters, and returns the result. The external stored procedure uses parameter style TD_GENERAL.

/*****  C source file name: getregion.c  *****/

#define  SQL_TEXT Latin_Text
#include <sqltypes_td.h>
#include <string.h>

   void xsp_getregion( VARCHAR_LATIN *region,
                       char           sqlstate[6])
   {
       char tmp_string[64];
       if (strlen((const char *)region) > 4)
       {
          /* Strip off the first four characters */
          strcpy(tmp_string, (char *)region);
          strcpy((char *)region, &tmp_string[4]);
       }
   }