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/*
* Copyright 2019-2022 Bytes & Brains
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "ALTER EXTENSION h3 UPDATE TO '3.6.0'" to load this file. \quit
-- Hierarchical grid functions (hierarchy.c)
CREATE OR REPLACE FUNCTION h3_to_center_child(h3index, resolution integer DEFAULT -1) RETURNS h3index
AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
COMMENT ON FUNCTION h3_to_parent(h3index, resolution integer) IS
'Returns the center child (finer) index contained by input index at given resolution';
-- Miscellaneous H3 functions (miscellaneous.c)
CREATE OR REPLACE FUNCTION h3_get_pentagon_indexes(resolution integer) RETURNS SETOF h3index
AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
COMMENT ON FUNCTION h3_get_res_0_indexes() IS
'All the pentagon H3 indexes at the specified resolution.';
-- type casts
CREATE OR REPLACE FUNCTION h3index_to_bigint(h3index) RETURNS bigint
AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE OR REPLACE FUNCTION bigint_to_h3index(bigint) RETURNS h3index
AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE CAST (h3index AS bigint) WITH FUNCTION h3index_to_bigint(h3index);
CREATE CAST (bigint AS h3index) WITH FUNCTION bigint_to_h3index(bigint);
-- string conversion already provided by type itself
DROP FUNCTION IF EXISTS h3_to_string(h3index);
DROP FUNCTION IF EXISTS h3_string_to_h3(cstring);