Firebird 2.5 Language ReferenceFirebird 2.5 Language ReferenceSystem Tables → RDB$FILTERS
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RDB$FILTERS

RDB$FILTERS stores information about BLOB filters.

Column Name Data Type Description
RDB$FUNCTION_NAME CHAR(31) The unique identifier of the BLOB filter
RDB$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(31) 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

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Firebird 2.5 Language ReferenceFirebird 2.5 Language ReferenceSystem Tables → RDB$FILTERS