Represents flags for RDB$FIELD_VERSIONS system table.

    Bit
    Position   Description

    0          Not used.
    1          Not used.
    2          Not used.
    3          Used by Oracle Rdb internally.
    4          Set if column references a local temporary table
               (usually a COMPUTED BY column).
    5          Use SQL semantics for check constraint processing.
    6          AUTOMATIC set on insert.
    7          AUTOMATIC set on update.
    8          If check constraint fails, use name in message.
    9          Column is computed by an IDENTITY sequence.
    10         View column is based on a read-only, or dbkey column.