BTRV Edition User's Guide

-alter

Changes the record schema of an existing file using xdd definitions.

Usage

ctutil -alter file xdd_file [-hot | -full]

where:

• file is the name of the file without extension.
• xdd_file is the path to an xdd file.
• -full forces full alter schema.
• -hat forces hot (on-the-fly) alter schema.

Note: The command allows only to append new fields to the end of the record schema. It is just like the SQL ‘ALTER TABLE’ statement, except it does not support removing fields from the record schema.