WIP: SP-GiST support

sql/install/14-opclass_spgist.sql

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2019-2020 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.
+ */
+
+-- ---------- ---------- ---------- ---------- ---------- ---------- ----------
+-- SP-GiST Operator Class (opclass_spgist.c)
+-- ---------- ---------- ---------- ---------- ---------- ---------- ----------
+
+-- SP-GiST operator class
+CREATE OR REPLACE FUNCTION h3index_spgist_config(internal, internal) RETURNS void
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+CREATE OR REPLACE FUNCTION h3index_spgist_choose(internal, internal) RETURNS void
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+CREATE OR REPLACE FUNCTION h3index_spgist_picksplit(internal, internal) RETURNS void
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+CREATE OR REPLACE FUNCTION h3index_spgist_inner_consistent(internal, internal) RETURNS void
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+CREATE OR REPLACE FUNCTION h3index_spgist_leaf_consistent(internal, internal) RETURNS bool
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+
+CREATE OPERATOR CLASS spgist_h3index_ops DEFAULT FOR TYPE h3index USING spgist AS
+    OPERATOR  6   =   ,
+    OPERATOR  7   @>  ,
+    OPERATOR  8  <@   ,
+
+    FUNCTION  1  h3index_spgist_config(internal, internal),
+    FUNCTION  2  h3index_spgist_choose(internal, internal),
+    FUNCTION  3  h3index_spgist_picksplit(internal, internal),
+    FUNCTION  4  h3index_spgist_inner_consistent(internal, internal),
+    FUNCTION  5  h3index_spgist_leaf_consistent(internal, internal);

sql/updates/h3--3.6.5--unreleased.sql

@@ -23,3 +23,29 @@ CREATE OPERATOR <-> (
   PROCEDURE = h3_distance,
   COMMUTATOR = <->
 );
+
+-- ---------- ---------- ---------- ---------- ---------- ---------- ----------
+-- SP-GiST Operator Class (opclass_spgist.c)
+-- ---------- ---------- ---------- ---------- ---------- ---------- ----------
+
+CREATE OR REPLACE FUNCTION h3index_spgist_config(internal, internal) RETURNS void
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+CREATE OR REPLACE FUNCTION h3index_spgist_choose(internal, internal) RETURNS void
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+CREATE OR REPLACE FUNCTION h3index_spgist_picksplit(internal, internal) RETURNS void
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+CREATE OR REPLACE FUNCTION h3index_spgist_inner_consistent(internal, internal) RETURNS void
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+CREATE OR REPLACE FUNCTION h3index_spgist_leaf_consistent(internal, internal) RETURNS bool
+    AS 'h3' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
+
+CREATE OPERATOR CLASS spgist_h3index_ops DEFAULT FOR TYPE h3index USING spgist AS
+    OPERATOR  6   =   ,
+    OPERATOR  7   @>  ,
+    OPERATOR  8  <@   ,
+
+    FUNCTION  1  h3index_spgist_config(internal, internal),
+    FUNCTION  2  h3index_spgist_choose(internal, internal),
+    FUNCTION  3  h3index_spgist_picksplit(internal, internal),
+    FUNCTION  4  h3index_spgist_inner_consistent(internal, internal),
+    FUNCTION  5  h3index_spgist_leaf_consistent(internal, internal);