Especially when migrating a Unicode UTF-8 OpenEdge database with Unicode data, Progress Software recommends that you select Width in the For Field widths use options during OpenEdge database migration or Incremental Schema Migration. Prior to migration, the DBTOOL database utility can be used to size your server columns based on the actual size of your CHARACTER, RAW and DECIMAL data rather than using the default format value in the schema to size your server columns.
The width value for each field is based on the maximum number of characters (not bytes) found in the database records of that column. For character data type, the size is calculated based on the code page defined in the database schema. You can also use the Adjust Field Width utility from the Options pulldown menu of the Data Dictionary to manually set a specific character width on an individual column prior to migration.