RDB$TYPES

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RDB$TYPES records enumerated data types and alias names for InterBase character sets and collation orders. This capability is not available in the current release.

RDB$TYPES

Column name	Data Type	Length	Description
RDB$FIELD_NAME	CHAR	67	Column for which the enumerated data type is being defined.
RDB$TYPE	SMALLINT		Identifies the internal number that represents the column specified above; type codes (same as RDB$DEPENDENT_TYPES): 0 - table 1 - view 2 - trigger 3 - computed_field 4 - validation 5 - procedure All other values are reserved for future use.
RDB$TYPE_NAME	CHAR	67	Text that corresponds to the internal number.
RDB$DESCRIPTION	BLOB		Subtype Text: Contains a user-written description of the enumerated data type being defined.
RDB$SYSTEM_FLAG	SMALLINT		Indicates whether the data type is: User-defined (value of 0) System-defined (value greater than 0)