postgresql/contrib/isbn_issn/issn.sql

117 lines
2.0 KiB
MySQL
Raw Normal View History

--
-- PostgreSQL code for ISSNs.
--
-- $Id: issn.sql,v 1.1 1998/08/17 03:35:05 scrappy Exp $
--
load '/usr/local/pgsql/modules/issn.so';
--
-- Input and output functions and the type itself:
--
create function issn_in(opaque)
returns opaque
as '/usr/local/pgsql/modules/issn.so'
language 'c';
create function issn_out(opaque)
returns opaque
as '/usr/local/pgsql/modules/issn.so'
language 'c';
create type issn (
internallength = 16,
externallength = 9,
input = issn_in,
output = issn_out
);
--
-- The various boolean tests:
--
create function issn_lt(issn, issn)
returns bool
as '/usr/local/pgsql/modules/issn.so'
language 'c';
create function issn_le(issn, issn)
returns bool
as '/usr/local/pgsql/modules/issn.so'
language 'c';
create function issn_eq(issn, issn)
returns bool
as '/usr/local/pgsql/modules/issn.so'
language 'c';
create function issn_ge(issn, issn)
returns bool
as '/usr/local/pgsql/modules/issn.so'
language 'c';
create function issn_gt(issn, issn)
returns bool
as '/usr/local/pgsql/modules/issn.so'
language 'c';
create function issn_ne(issn, issn)
returns bool
as '/usr/local/pgsql/modules/issn.so'
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
--