Изменение длины полей в Attain'e

[Rungart]

Есть такая засада:
Specifications for Tables
Range for table object ID numbers : 1 -999,999,999 (A)
Maximum number of characters in a table name : 30
Maximum table size : Infinite
Maximum number of records in a table : Infinite
Maximum record size : 4000
Maximum number of fields in a record : 500
Range for field numbers : 1 - 999,999,999
Maximum number of keys for a table : 40
Maximum number of distinct fields per key 20 for a primary key. The number of fields in the
primary key + the number of fields in a secondary key which do not occur in the primary key must always be less than or equal to 20.
Maximum number of SumIndexFields per key : 20
Maximum number of characters in a text or
code field : 250
Maximum size of a BLOB field : 2 GB
Maximum number of characters in a field name : 30

Возможно, стоит использовать вычисляемые поля?