ASSUMEDSTRWIDTH subcommand (GET DATA command)

For TYPE=ODBC, TYPE=OLEDB, and TYPE=XLS, this controls the width of variable-width string values. By default, the width is 255 bytes, and only the first 255 bytes will be read. The width can be up to 32,767 bytes. Although you probably don't want to truncate string values, you also don't want to specify an unnecessarily large value, since this will be used as the display width for those string values.