RDB$REF_CONSTRAINTS

RDB$CONSTRAINT_NAME

CHAR(63)

Foreign key constraint name, defined by the user or automatically generated by the system

RDB$CONST_NAME_UQ

CHAR(63)

The name of the primary or unique key constraint linked by the REFERENCES clause in the constraint definition

RDB$MATCH_OPTION

CHAR(7)

Not used.The current value is FULL in all cases

RDB$UPDATE_RULE

CHAR(11)

Referential integrity actions applied to the foreign key record(s) when the primary (unique) key of the parent table is updated: RESTRICT, NO ACTION, CASCADE, SET NULL, SET DEFAULT

RDB$DELETE_RULE

CHAR(11)

Referential integrity actions applied to the foreign key record(s) when the primary (unique) key of the parent table is deleted: RESTRICT, NO ACTION, CASCADE, SET NULL, SET DEFAULT

RDB$CHARACTER_SET_NAME

CHAR(63)

Character set name

RDB$FORM_OF_USE

CHAR(63)

Not used

RDB$NUMBER_OF_CHARACTERS

INTEGER

The number of characters in the set.Not used for existing character sets

RDB$DEFAULT_COLLATE_NAME

CHAR(63)

The name of the default collation for the character set

RDB$CHARACTER_SET_ID

SMALLINT

Unique character set identifier

RDB$SYSTEM_FLAG

SMALLINT

System flag: value is 1 if the character set is defined in the system when the database is created;value is 0 for a user-defined character set

RDB$DESCRIPTION

BLOB TEXT

Could store text description of the character set

RDB$FUNCTION_NAME

CHAR(63)

For a user-defined character set that is accessed via an external function, the name of the external function

RDB$BYTES_PER_CHARACTER

SMALLINT

The maximum number of bytes representing one character

RDB$SECURITY_CLASS

CHAR(63)

May reference a security class defined in the table RDB$SECURITY_CLASSES, to apply access control limits to all users of this character set

RDB$OWNER_NAME

CHAR(63)

The username of the user who created the character set originally