D.14 RDB$FILTERS

RDB$FILTERS stores information about BLOB filters.

Column NameData TypeDescription

RDB$FUNCTION_NAME

CHAR(63)

The unique identifier of the BLOB filter

RDB$DESCRIPTION

BLOB TEXT

Documentation about the BLOB filter and the two subtypes it is used with, written by the user

RDB$MODULE_NAME

VARCHAR(255)

The name of the dynamic library or shared object where the code of the BLOB filter is located

RDB$ENTRYPOINT

CHAR(255)

The exported name of the BLOB filter in the filter library. Note, this is often not the same as RDB$FUNCTION_NAME, which is the identifier with which the BLOB filter is declared to the database

RDB$INPUT_SUB_TYPE

SMALLINT

The BLOB subtype of the data to be converted by the function

RDB$OUTPUT_SUB_TYPE

SMALLINT

The BLOB subtype of the converted data

RDB$SYSTEM_FLAG

SMALLINT

Flag indicating whether the filter is user-defined or internally defined:

0 - user-defined 1 or greater - internally defined

RDB$SECURITY_CLASS

CHAR(63)

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

RDB$OWNER_NAME

CHAR(63)

The user name of the user who created the filter originally