This code converts a GEN timestamp to text:

SET temp timestamp TO CURRENT_TIMESTAMP 
SET temp date TO datetimestamp(temp timestamp) 
SET temp time TO timetimestamp(temp timestamp) 
SET temp ms TO microsecond(temp timestamp) 
SET export text_20 TO substr(textnum(numdate(temp date)), 8, 8) 
SET export text_20 TO concat(trim(export text_20),
           substr(textnum(numtime(temp time)), 10, 6)) 
SET export text_20 TO concat(trim(export text_20),
           substr(textnum(temp ms), 10, 6)) 

And here is code to convert from text to timestamp:


SET temp text_variable TO concat(substr(import  text_20, 1, 4), 
             concat("-",
             concat(substr(import text_20, 5, 2), 
             concat("-", substr(import text_20, 7, 2))))) 
SET temp text_variable TO concat(trim(temp text_variable), 
             concat("-",concat(substr(import text_20, 9, 2), 
             concat(".",
             concat(substr(import text_20, 11, 2), 
             concat(".", substr(import text_20, 13, 2))))))) 
SET temp text_variable TO concat(trim(temp text_variable), 
             concat(".",substr(import text_20, 15, 6))) 
SET export timestamp TO timestamp(temp text_variable)