--
--	PostgreSQL code for ISSNs.
--
--	$Id: isbn_issn.sql.in,v 1.6 2002/08/22 00:01:39 tgl Exp $
--

-- Adjust this setting to control where the objects get created.
SET search_path = public;


--
--	Input and output functions and the type itself:
--

create function issn_in(cstring)
	returns issn
	as 'MODULE_PATHNAME'
	language 'c';

create function issn_out(issn)
	returns cstring
	as 'MODULE_PATHNAME'
	language 'c';

create type issn (
	internallength = 16,
	externallength = 9,
	input = issn_in,
	output = issn_out
);

comment on type issn
  is 'International Standard Serial Number';


--
--	The various boolean tests:
--

create function issn_lt(issn, issn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function issn_le(issn, issn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function issn_eq(issn, issn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function issn_ge(issn, issn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function issn_gt(issn, issn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function issn_ne(issn, issn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

--
--	Now the operators.  Note how some of the parameters to some
--	of the 'create operator' commands are commented out.  This
--	is because they reference as yet undefined operators, and
--	will be implicitly defined when those are, further down.
--

create operator < (
	leftarg = issn,
	rightarg = issn,
--	negator = >=,
	procedure = issn_lt
);

create operator <= (
	leftarg = issn,
	rightarg = issn,
--	negator = >,
	procedure = issn_le
);

create operator = (
	leftarg = issn,
	rightarg = issn,
	commutator = =,
--	negator = <>,
	procedure = issn_eq
);

create operator >= (
	leftarg = issn,
	rightarg = issn,
	negator = <,
	procedure = issn_ge
);

create operator > (
	leftarg = issn,
	rightarg = issn,
	negator = <=,
	procedure = issn_gt
);

create operator <> (
	leftarg = issn,
	rightarg = issn,
	negator = =,
	procedure = issn_ne
);

--
--	eof
--
--
--	PostgreSQL code for ISBNs.
--
--	$Id: isbn_issn.sql.in,v 1.6 2002/08/22 00:01:39 tgl Exp $
--
--
--	Input and output functions and the type itself:
--

create function isbn_in(cstring)
	returns isbn
	as 'MODULE_PATHNAME'
	language 'c';

create function isbn_out(isbn)
	returns cstring
	as 'MODULE_PATHNAME'
	language 'c';

create type isbn (
	internallength = 16,
	externallength = 13,
	input = isbn_in,
	output = isbn_out
);

comment on type isbn
  is 'International Standard Book Number';


--
--	The various boolean tests:
--

create function isbn_lt(isbn, isbn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function isbn_le(isbn, isbn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function isbn_eq(isbn, isbn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function isbn_ge(isbn, isbn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function isbn_gt(isbn, isbn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

create function isbn_ne(isbn, isbn)
	returns bool
	as 'MODULE_PATHNAME'
	language 'c';

--
--	Now the operators.  Note how some of the parameters to some
--	of the 'create operator' commands are commented out.  This
--	is because they reference as yet undefined operators, and
--	will be implicitly defined when those are, further down.
--

create operator < (
	leftarg = isbn,
	rightarg = isbn,
--	negator = >=,
	procedure = isbn_lt
);

create operator <= (
	leftarg = isbn,
	rightarg = isbn,
--	negator = >,
	procedure = isbn_le
);

create operator = (
	leftarg = isbn,
	rightarg = isbn,
	commutator = =,
--	negator = <>,
	procedure = isbn_eq
);

create operator >= (
	leftarg = isbn,
	rightarg = isbn,
	negator = <,
	procedure = isbn_ge
);

create operator > (
	leftarg = isbn,
	rightarg = isbn,
	negator = <=,
	procedure = isbn_gt
);

create operator <> (
	leftarg = isbn,
	rightarg = isbn,
	negator = =,
	procedure = isbn_ne
);


-- Register 'isbn' comparison function
create function isbn_cmp(isbn, isbn)
    returns integer
    as '$libdir/isbn_issn'
    language c;

-- Register 'issn' comparison function
create function issn_cmp(issn, issn)
    returns integer
    as '$libdir/isbn_issn'
    language c;

-------------------------------------------------
-- Create default operator class for 'isbn'    --
-- Needed to create index or primary key       --
-------------------------------------------------

CREATE OPERATOR CLASS isbn_ops
    DEFAULT FOR TYPE isbn USING btree AS
        OPERATOR        1       < ,
        OPERATOR        2       <= ,
        OPERATOR        3       = ,
        OPERATOR        4       >= ,
        OPERATOR        5       > ,
        FUNCTION        1       isbn_cmp(isbn, isbn);

-------------------------------------------------
-- Create default operator class for 'issn'    --
-- Needed to create index or primary key       --
-------------------------------------------------

CREATE OPERATOR CLASS issn_ops
    DEFAULT FOR TYPE issn USING btree AS
        OPERATOR        1       < ,
        OPERATOR        2       <= ,
        OPERATOR        3       = ,
        OPERATOR        4       >= ,
        OPERATOR        5       > ,
        FUNCTION        1       issn_cmp(issn, issn);


--
--	eof
--
