How to change length of Column through SQL query in Siebel

Get Row Id of Column from Siebel Tools and replace below:

SELECT
ROW_ID,
NAME AS 'Column Name',
LENGTH AS 'Column Length'

FROM S_COLUMN

WHERE ROW_ID = '1-6D23-JMI0'



--UPDATE S_COLUMN SET LENGTH = '255' WHERE ROW_ID = '1-6D23-JMI0'