System table identifiers all begin with the prefix RDB$.

    List of System Tables

    Section D.1, RDB$AUTH_MAPPING

    Stores authentication and other security mappings

    History of backups performed using nBackup

    Section D.3, RDB$CHARACTER_SETS

    Names and describes the character sets available in the database

    Cross references between the names of constraints (NOT NULL constraints, CHECK constraints and ON UPDATE and ON DELETE clauses in foreign key constraints) and their associated system-generated triggers

    Section D.5, RDB$COLLATIONS

    Collation sequences for all character sets

    Virtual table with configuration settings applied for the current database

    Section D.7, RDB$DATABASE

    Basic information about the database

    A list of users granted the CREATE DATABASE privilege when using the specified database as a security database

    Section D.9, RDB$DEPENDENCIES

    Information about dependencies between database objects

    Custom database exceptions

    Section D.11, RDB$FIELDS

    Column and domain definitions, both system and custom

    Dimensions of array columns

    Section D.13, RDB$FILES

    Information about secondary files and shadow files

    Information about BLOB filters

    Section D.15, RDB$FORMATS

    Information about changes in the formats of tables

    Information about external functions

    Section D.17, RDB$FUNCTION_ARGUMENTS

    Attributes of the parameters of external functions

    Information about generators (sequences)

    Segments and index positions

    Section D.19, RDB$INDICES

    Definitions of all indexes in the database (system- or user-defined)

    Not used in the current version

    Section D.22, RDB$PACKAGES

    Stores the definition (header and body) of SQL packages

    Information about database pages

    Section D.24, RDB$PROCEDURES

    Definitions of stored procedures

    Parameters of stored procedures

    Section D.28, RDB$REF_CONSTRAINTS

    Definitions of referential constraints (foreign keys)

    Headers of tables and views

    Section D.30, RDB$RELATION_CONSTRAINTS

    Definitions of all table-level constraints

    Top-level definitions of table columns

    Section D.32, RDB$ROLES

    Role definitions

    Access control lists

    Section D.34, RDB$TIME_ZONES

    Time zones

    State of multi-database transactions

    Section D.36, RDB$TRIGGERS

    Trigger definitions

    Trigger messages

    Section D.38, RDB$TYPES

    SQL privileges granted to system users

    Section D.40, RDB$VIEW_RELATIONS

    Tables that are referred to in view definitions: one record for each table in a view

    D.1 RDB$AUTH_MAPPING

    RDB$AUTH_MAPPING stores authentication and other security mappings.