RDB$USERS

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RDB$USERS only permits users in that system table access to the database.

RDB$USERS

Column name	Datatype	Length	Description
RDB$USER_NAME (RDB$USER_NAME)	VARCHAR(128)	CHARACTER SET UNICODE_FSS Nullable
RDB$SYSTEM_USER_NAME (RDB$USER_NAME)	VARCHAR(128)	CHARACTER SET UNICODE_FSS Nullable
RDB$GROUP_NAME (RDB$USER_NAME)	VARCHAR(128)	CHARACTER SET UNICODE_FSS Nullable
RDB$UID (RDB$UID)	INTEGER	Nullable
RDB$GID (RDB$GID)	INTEGER	Nullable
RDB$PASSWORD (RDB$PASSWORD)	VARCHAR(32)	CHARACTER SET OCTETS Nullable
RDB$USER_ACTIVE (RDB$USER_ACTIVE)	CHAR(2)	Nullable
RDB$USER_PRIVILEGE (RDB$USER_PRIVILEGE)	INTEGER	Nullable
RDB$DESCRIPTION (RDB$DESCRIPTION)	BLOB	segment 80, subtype TEXT CHARACTER SET UNICODE_FSS Nullable
RDB$FIRST_NAME (RDB$NAME_PART)	VARCHAR(32)	CHARACTER SET UNICODE_FSS Nullable
RDB$MIDDLE_NAME (RDB$NAME_PART)	VARCHAR(32)	CHARACTER SET UNICODE_FSS Nullable
RDB$LAST_NAME (RDB$NAME_PART	VARCHAR(32)	CHARACTER SET UNICODE_FSS Nullable
RDB$DEFAULT_ROLE (RDB$USER)	CHAR(67)	CHARACTER SET UNICODE_FSS Nullable
RDB$PASSWORD_DIGEST (RDB$PASSWORD_DIGEST)	VARCHAR(16)	Nullable