SQL Definition - Advanced SQL Engine - Teradata Database

The following SQL statements show the DDL for the foot distinct UDT, the meter distinct UDT, and the toFoot method that casts from a meter distinct UDT to a foot distinct UDT.

CREATE TYPE foot AS FLOAT FINAL;

CREATE TYPE meter AS FLOAT
   FINAL
   INSTANCE METHOD toFoot()
      RETURNS foot
      SPECIFIC meter_toFoot
      NO SQL
      PARAMETER STYLE TD_GENERAL
      DETERMINISTIC
      LANGUAGE C;

CREATE METHOD toFoot()
   RETURNS foot
   FOR meter
   EXTERNAL NAME 'CS!tofoot!udm_src\to_foot.c!F!meter_toFoot';

CREATE CAST (meter AS foot)
WITH SPECIFIC METHOD meter_toFoot AS ASSIGNMENT;