postgres/contrib/ltree/ltree.sql.in

BEGIN;

CREATE FUNCTION ltree_in(opaque)
RETURNS opaque
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict);

CREATE FUNCTION ltree_out(opaque)
RETURNS opaque
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict);

CREATE TYPE ltree (
internallength = -1,
input = ltree_in,
output = ltree_out,
storage = extended
);


--Compare function for ltree
CREATE FUNCTION ltree_cmp(ltree,ltree)
RETURNS int4
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_lt(ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_le(ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_eq(ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_ge(ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_gt(ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_ne(ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);


CREATE OPERATOR < (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_lt,
        COMMUTATOR = '>', NEGATOR = '>=',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR <= (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_le,
        COMMUTATOR = '>=', NEGATOR = '>',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR >= (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_ge,
        COMMUTATOR = '<=', NEGATOR = '<',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR > (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_gt,
        COMMUTATOR = '<', NEGATOR = '<=',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR = (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_eq,
        COMMUTATOR = '=', NEGATOR = '<>',
        RESTRICT = eqsel, JOIN = eqjoinsel,
        SORT1 = '<', SORT2 = '<'
);

CREATE OPERATOR <> (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_ne,
        COMMUTATOR = '<>', NEGATOR = '=',
        RESTRICT = neqsel, JOIN = neqjoinsel
);

--util functions

CREATE FUNCTION subltree(ltree,int4,int4)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION subpath(ltree,int4,int4)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION subpath(ltree,int4)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION nlevel(ltree)
RETURNS int4
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_isparent(ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_risparent(ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_addltree(ltree,ltree)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_addtext(ltree,text)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltree_textadd(text,ltree)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE OPERATOR @> (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_isparent,
        COMMUTATOR = '<@',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^@> (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_isparent,
        COMMUTATOR = '^<@',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR <@ (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_risparent,
        COMMUTATOR = '@>',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^<@ (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_risparent,
        COMMUTATOR = '^@>',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR || (
        LEFTARG = ltree, RIGHTARG = ltree, PROCEDURE = ltree_addltree
);

CREATE OPERATOR || (
        LEFTARG = ltree, RIGHTARG = text, PROCEDURE = ltree_addtext
);

CREATE OPERATOR || (
        LEFTARG = text, RIGHTARG = ltree, PROCEDURE = ltree_textadd
);


-- B-tree support
INSERT INTO pg_opclass (opcamid, opcname, opcnamespace, opcowner, opcintype, opcdefault, opckeytype)
    VALUES (
        (SELECT oid FROM pg_am WHERE amname = 'btree'),
        'ltree_ops',
	(SELECT oid FROM pg_namespace WHERE nspname = 'pg_catalog'),
	1,      -- UID of superuser is hardwired to 1 as of PG 7.3
        (SELECT oid FROM pg_type WHERE typname = 'ltree'),
        true,
        0);

SELECT o.oid AS opoid, o.oprname
    INTO TEMP TABLE ltree_ops_tmp
    FROM pg_operator o, pg_type t
    WHERE o.oprleft = t.oid and o.oprright = t.oid
      and t.typname = 'ltree';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
    SELECT opcl.oid, 1, false, c.opoid
        FROM pg_opclass opcl, ltree_ops_tmp c
        WHERE
            opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree') AND
            opcname = 'ltree_ops' AND
            c.oprname = '<';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
    SELECT opcl.oid, 2, false, c.opoid
        FROM pg_opclass opcl, ltree_ops_tmp c
        WHERE
            opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree') AND
            opcname = 'ltree_ops' AND
            c.oprname = '<=';
INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
    SELECT opcl.oid, 3, false, c.opoid
        FROM pg_opclass opcl, ltree_ops_tmp c
        WHERE
            opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree') AND
            opcname = 'ltree_ops' AND
            c.oprname = '=';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
    SELECT opcl.oid, 4, false, c.opoid
        FROM pg_opclass opcl, ltree_ops_tmp c
        WHERE
            opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree') AND
            opcname = 'ltree_ops' AND
            c.oprname = '>=';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
    SELECT opcl.oid, 5, false, c.opoid
        FROM pg_opclass opcl, ltree_ops_tmp c
        WHERE
            opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree') AND
            opcname = 'ltree_ops' AND
            c.oprname = '>';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
    SELECT opcl.oid, 1, p.oid
        FROM pg_opclass opcl, pg_proc p
        WHERE
            opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree') AND
            opcname = 'ltree_ops' AND
            p.proname = 'ltree_cmp';

drop table ltree_ops_tmp;

--lquery type
CREATE FUNCTION lquery_in(opaque)
RETURNS opaque
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict);

CREATE FUNCTION lquery_out(opaque)
RETURNS opaque
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict);

CREATE TYPE lquery (
internallength = -1,
input = lquery_in,
output = lquery_out,
storage = extended
);

CREATE FUNCTION ltq_regex(ltree,lquery)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION ltq_rregex(lquery,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE OPERATOR ~ (
        LEFTARG = ltree, RIGHTARG = lquery, PROCEDURE = ltq_regex,
	COMMUTATOR = '~',
	RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ~ (
        LEFTARG = lquery, RIGHTARG = ltree, PROCEDURE = ltq_rregex,
	COMMUTATOR = '~',
	RESTRICT = contsel, JOIN = contjoinsel
);

--not-indexed
CREATE OPERATOR ^~ (
        LEFTARG = ltree, RIGHTARG = lquery, PROCEDURE = ltq_regex,
	COMMUTATOR = '^~',
	RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^~ (
        LEFTARG = lquery, RIGHTARG = ltree, PROCEDURE = ltq_rregex,
	COMMUTATOR = '^~',
	RESTRICT = contsel, JOIN = contjoinsel
);

CREATE FUNCTION ltxtq_in(opaque)
RETURNS opaque
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict);

CREATE FUNCTION ltxtq_out(opaque)
RETURNS opaque
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict);

CREATE TYPE ltxtquery (
internallength = -1,
input = ltxtq_in,
output = ltxtq_out,
storage = extended
);

-- operations with ltxtquery

CREATE FUNCTION ltxtq_exec(ltree, ltxtquery)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict, iscachable);

CREATE FUNCTION ltxtq_rexec(ltxtquery, ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict, iscachable);

CREATE OPERATOR @ (
        LEFTARG = ltree, RIGHTARG = ltxtquery, PROCEDURE = ltxtq_exec,
	COMMUTATOR = '@',
	RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR @ (
        LEFTARG = ltxtquery, RIGHTARG = ltree, PROCEDURE = ltxtq_rexec,
	COMMUTATOR = '@',
	RESTRICT = contsel, JOIN = contjoinsel
);

--not-indexed
CREATE OPERATOR ^@ (
        LEFTARG = ltree, RIGHTARG = ltxtquery, PROCEDURE = ltxtq_exec,
	COMMUTATOR = '^@',
	RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^@ (
        LEFTARG = ltxtquery, RIGHTARG = ltree, PROCEDURE = ltxtq_rexec,
	COMMUTATOR = '^@',
	RESTRICT = contsel, JOIN = contjoinsel
);

--GiST support for ltree
CREATE FUNCTION ltree_gist_in(opaque)
RETURNS opaque
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict);
   
CREATE FUNCTION ltree_gist_out(opaque)
RETURNS opaque
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict);
   
CREATE TYPE ltree_gist (
	internallength = -1,
	input = ltree_gist_in,
	output = ltree_gist_out,
	storage = plain
);    


create function ltree_consistent(opaque,opaque,int2) returns bool as 'MODULE_PATHNAME' language 'C';
create function ltree_compress(opaque) returns opaque as 'MODULE_PATHNAME' language 'C';
create function ltree_decompress(opaque) returns opaque as 'MODULE_PATHNAME' language 'C';
create function ltree_penalty(opaque,opaque,opaque) returns opaque as 'MODULE_PATHNAME' language 'C' with(isstrict);
create function ltree_picksplit(opaque, opaque) returns opaque as 'MODULE_PATHNAME' language 'C';
create function ltree_union(bytea, opaque) returns int4 as 'MODULE_PATHNAME' language 'C';
create function ltree_same(opaque, opaque, opaque) returns opaque as 'MODULE_PATHNAME' language 'C';

INSERT INTO pg_opclass (opcamid, opcname, opcnamespace, opcowner, opcintype, opckeytype, opcdefault)
   SELECT pg_am.oid, 'gist_ltree_ops', 
	(SELECT oid FROM pg_namespace WHERE nspname = 'pg_catalog'),
	1,      -- UID of superuser is hardwired to 1 as of PG 7.3
	pg_type.oid, pg_key.oid, true
   FROM pg_type, pg_am, pg_type pg_key
   WHERE pg_type.typname = 'ltree' and
   pg_am.amname='gist' and
   pg_key.typname = 'ltree_gist';

SELECT o.oid AS opoid, o.oprname
INTO TABLE ltree_ops_tmp
FROM pg_operator o, pg_type t
WHERE o.oprleft = t.oid and o.oprright = t.oid
   and t.typname = 'ltree';

INSERT INTO pg_amop (amopclaid, amopopr, amopstrategy, amopreqcheck)
   SELECT opcl.oid, c.opoid, 1, 'f'
   FROM pg_opclass opcl, ltree_ops_tmp c
   WHERE opcname = 'gist_ltree_ops'
      and c.oprname = '<';

INSERT INTO pg_amop (amopclaid, amopopr, amopstrategy, amopreqcheck)
   SELECT opcl.oid, c.opoid, 2, 'f'
   FROM pg_opclass opcl, ltree_ops_tmp c
   WHERE opcname = 'gist_ltree_ops'
      and c.oprname = '<=';

INSERT INTO pg_amop (amopclaid, amopopr, amopstrategy, amopreqcheck)
   SELECT opcl.oid, c.opoid, 3, 'f'
   FROM pg_opclass opcl, ltree_ops_tmp c
   WHERE opcname = 'gist_ltree_ops'
      and c.oprname = '=';

INSERT INTO pg_amop (amopclaid, amopopr, amopstrategy, amopreqcheck)
   SELECT opcl.oid, c.opoid, 4, 'f'
   FROM pg_opclass opcl, ltree_ops_tmp c
   WHERE opcname = 'gist_ltree_ops'
      and c.oprname = '>=';

INSERT INTO pg_amop (amopclaid, amopopr, amopstrategy, amopreqcheck)
   SELECT opcl.oid, c.opoid, 5, 'f'
   FROM pg_opclass opcl, ltree_ops_tmp c
   WHERE opcname = 'gist_ltree_ops'
      and c.oprname = '>';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 10, false, c.opoid
   FROM pg_opclass opcl, ltree_ops_tmp c
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and c.oprname = '@>';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 11, false, c.opoid
   FROM pg_opclass opcl, ltree_ops_tmp c
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and c.oprname = '<@';

DROP TABLE ltree_ops_tmp;

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 12, false, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and t.typname = 'ltree' and tq.typname = 'lquery'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '~';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 13, false, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and t.typname = 'lquery' and tq.typname = 'ltree'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '~';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 14, false, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and t.typname = 'ltree' and tq.typname = 'ltxtquery'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '@';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 15, false, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and t.typname = 'ltxtquery' and tq.typname = 'ltree'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '@';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 1, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and proname = 'ltree_consistent';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 2, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and proname = 'ltree_union';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 3, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and proname = 'ltree_compress';
INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 4, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and proname = 'ltree_decompress';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 5, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and proname = 'ltree_penalty';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 6, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and proname = 'ltree_picksplit';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 7, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist_ltree_ops'
      and proname = 'ltree_same';

-- arrays of ltree

CREATE FUNCTION _ltree_isparent(_ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION _ltree_r_isparent(ltree,_ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION _ltree_risparent(_ltree,ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION _ltree_r_risparent(ltree,_ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION _ltq_regex(_ltree,lquery)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION _ltq_rregex(lquery,_ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE FUNCTION _ltxtq_exec(_ltree, ltxtquery)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict, iscachable);

CREATE FUNCTION _ltxtq_rexec(ltxtquery, _ltree)
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict, iscachable);

CREATE OPERATOR @> (
        LEFTARG = _ltree, RIGHTARG = ltree, PROCEDURE = _ltree_isparent,
        COMMUTATOR = '<@',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR <@ (
        LEFTARG = ltree, RIGHTARG = _ltree, PROCEDURE = _ltree_r_isparent,
        COMMUTATOR = '@>',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR <@ (
        LEFTARG = _ltree, RIGHTARG = ltree, PROCEDURE = _ltree_risparent,
        COMMUTATOR = '@>',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR @> (
        LEFTARG = ltree, RIGHTARG = _ltree, PROCEDURE = _ltree_r_risparent,
        COMMUTATOR = '<@',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ~ (
        LEFTARG = _ltree, RIGHTARG = lquery, PROCEDURE = _ltq_regex,
        COMMUTATOR = '~',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ~ (
        LEFTARG = lquery, RIGHTARG = _ltree, PROCEDURE = _ltq_rregex,
        COMMUTATOR = '~',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR @ (
        LEFTARG = _ltree, RIGHTARG = ltxtquery, PROCEDURE = _ltxtq_exec,
        COMMUTATOR = '@',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR @ (
        LEFTARG = ltxtquery, RIGHTARG = _ltree, PROCEDURE = _ltxtq_rexec,
        COMMUTATOR = '@',
        RESTRICT = contsel, JOIN = contjoinsel
);


--not indexed
CREATE OPERATOR ^@> (
        LEFTARG = _ltree, RIGHTARG = ltree, PROCEDURE = _ltree_isparent,
        COMMUTATOR = '^<@',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^<@ (
        LEFTARG = ltree, RIGHTARG = _ltree, PROCEDURE = _ltree_r_isparent,
        COMMUTATOR = '^@>',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^<@ (
        LEFTARG = _ltree, RIGHTARG = ltree, PROCEDURE = _ltree_risparent,
        COMMUTATOR = '^@>',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^@> (
        LEFTARG = ltree, RIGHTARG = _ltree, PROCEDURE = _ltree_r_risparent,
        COMMUTATOR = '^<@',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^~ (
        LEFTARG = _ltree, RIGHTARG = lquery, PROCEDURE = _ltq_regex,
        COMMUTATOR = '^~',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^~ (
        LEFTARG = lquery, RIGHTARG = _ltree, PROCEDURE = _ltq_rregex,
        COMMUTATOR = '^~',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^@ (
        LEFTARG = _ltree, RIGHTARG = ltxtquery, PROCEDURE = _ltxtq_exec,
        COMMUTATOR = '^@',
        RESTRICT = contsel, JOIN = contjoinsel
);

CREATE OPERATOR ^@ (
        LEFTARG = ltxtquery, RIGHTARG = _ltree, PROCEDURE = _ltxtq_rexec,
        COMMUTATOR = '^@',
        RESTRICT = contsel, JOIN = contjoinsel
);

--extractors
CREATE FUNCTION _ltree_extract_isparent(_ltree,ltree)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE OPERATOR ?@> (
        LEFTARG = _ltree, RIGHTARG = ltree, PROCEDURE = _ltree_extract_isparent
);

CREATE FUNCTION _ltree_extract_risparent(_ltree,ltree)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE OPERATOR ?<@ (
        LEFTARG = _ltree, RIGHTARG = ltree, PROCEDURE = _ltree_extract_risparent
);

CREATE FUNCTION _ltq_extract_regex(_ltree,lquery)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE OPERATOR ?~ (
        LEFTARG = _ltree, RIGHTARG = lquery, PROCEDURE = _ltq_extract_regex
);

CREATE FUNCTION _ltxtq_extract_exec(_ltree,ltxtquery)
RETURNS ltree
AS 'MODULE_PATHNAME'
LANGUAGE 'c' with (isstrict,iscachable);

CREATE OPERATOR ?@ (
        LEFTARG = _ltree, RIGHTARG = ltxtquery, PROCEDURE = _ltxtq_extract_exec
);

--GiST support for ltree[]
create function _ltree_consistent(opaque,opaque,int2) returns bool as 'MODULE_PATHNAME' language 'C';
create function _ltree_compress(opaque) returns opaque as 'MODULE_PATHNAME' language 'C';
create function _ltree_penalty(opaque,opaque,opaque) returns opaque as 'MODULE_PATHNAME' language 'C' with(isstrict);
create function _ltree_picksplit(opaque, opaque) returns opaque as 'MODULE_PATHNAME' language 'C';
create function _ltree_union(bytea, opaque) returns int4 as 'MODULE_PATHNAME' language 'C';
create function _ltree_same(opaque, opaque, opaque) returns opaque as 'MODULE_PATHNAME' language 'C';

INSERT INTO pg_opclass (opcamid, opcname, opcnamespace, opcowner, opcintype, opckeytype, opcdefault)
   SELECT pg_am.oid, 'gist__ltree_ops', 
	(SELECT oid FROM pg_namespace WHERE nspname = 'pg_catalog'),
	1,      -- UID of superuser is hardwired to 1 as of PG 7.3
	pg_type.oid, pg_key.oid, true
   FROM pg_type, pg_am, pg_type pg_key
   WHERE pg_type.typname = '_ltree' and
   pg_am.amname='gist' and
   pg_key.typname = 'ltree_gist';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 12, true, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and t.typname = '_ltree' and tq.typname = 'lquery'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '~';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 13, true, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and t.typname = 'lquery' and tq.typname = '_ltree'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '~';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 14, true, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and t.typname = '_ltree' and tq.typname = 'ltxtquery'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '@';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 15, true, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and t.typname = 'ltxtquery' and tq.typname = '_ltree'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '@';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 10, true, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and t.typname = '_ltree' and tq.typname = 'ltree'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '<@';

INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
   SELECT opcl.oid, 11, true, o.oid
   FROM pg_opclass opcl, pg_operator o, pg_type t, pg_type tq
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and t.typname = 'ltree' and tq.typname = '_ltree'
      and o.oprleft = t.oid and o.oprright = tq.oid 
      and o.oprname = '@>';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 1, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and proname = '_ltree_consistent';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 2, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and proname = '_ltree_union';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 3, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and proname = '_ltree_compress';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 4, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and proname = 'ltree_decompress';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 5, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and proname = '_ltree_penalty';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 6, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and proname = '_ltree_picksplit';

INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
   SELECT opcl.oid, 7, pro.oid
   FROM pg_opclass opcl, pg_proc pro
   WHERE
      opcamid = (SELECT oid FROM pg_am WHERE amname = 'gist')
      and opcname = 'gist__ltree_ops'
      and proname = '_ltree_same';

END;