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-------------------------------------------------------------------------------
--
--
-- PostGIS Raster - Raster Type for PostGIS
-- http://trac.osgeo.org/postgis/wiki/WKTRaster
--
-- Copyright (C) 2012 Regents of the University of California
-- <bkpark@ucdavis.edu>
--
-- This program is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License
-- as published by the Free Software Foundation; either version 2
-- of the License, or (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software Foundation,
-- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
--
-------------------------------------------------------------------------------
--
-- For legacy access to OLD versions of raster_columns AND raster_overviews
--
-- raster_columns and raster_overviews tables no longer exist
-- if tables found, rename tables
DROP FUNCTION IF EXISTS _rename_raster_tables();
CREATE OR REPLACE FUNCTION _rename_raster_tables()
RETURNS void AS $$
DECLARE
cnt int;
BEGIN
SELECT count(*) INTO cnt
FROM pg_class c
JOIN pg_namespace n
ON c.relnamespace = n.oid
WHERE c.relname = 'raster_columns'
AND c.relkind = 'r'::char
AND NOT pg_is_other_temp_schema(c.relnamespace);
IF cnt > 0 THEN
EXECUTE 'ALTER TABLE raster_columns RENAME TO deprecated_raster_columns';
END IF;
SELECT count(*) INTO cnt
FROM pg_class c
JOIN pg_namespace n
ON c.relnamespace = n.oid
WHERE c.relname = 'raster_overviews'
AND c.relkind = 'r'::char
AND NOT pg_is_other_temp_schema(c.relnamespace);
IF cnt > 0 THEN
EXECUTE 'ALTER TABLE raster_overviews RENAME TO deprecated_raster_overviews';
END IF;
END;
$$ LANGUAGE 'plpgsql' VOLATILE;
SELECT _rename_raster_tables();
DROP FUNCTION _rename_raster_tables();
CREATE OR REPLACE VIEW raster_columns AS
SELECT
current_database() AS r_table_catalog,
n.nspname AS r_table_schema,
c.relname AS r_table_name,
a.attname AS r_raster_column,
COALESCE(_raster_constraint_info_srid(n.nspname, c.relname, a.attname), (SELECT ST_SRID('POINT(0 0)'::geometry))) AS srid,
_raster_constraint_info_scale(n.nspname, c.relname, a.attname, 'x') AS scale_x,
_raster_constraint_info_scale(n.nspname, c.relname, a.attname, 'y') AS scale_y,
_raster_constraint_info_blocksize(n.nspname, c.relname, a.attname, 'width') AS blocksize_x,
_raster_constraint_info_blocksize(n.nspname, c.relname, a.attname, 'height') AS blocksize_y,
COALESCE(_raster_constraint_info_alignment(n.nspname, c.relname, a.attname), FALSE) AS same_alignment,
COALESCE(_raster_constraint_info_regular_blocking(n.nspname, c.relname, a.attname), FALSE) AS regular_blocking,
_raster_constraint_info_num_bands(n.nspname, c.relname, a.attname) AS num_bands,
_raster_constraint_info_pixel_types(n.nspname, c.relname, a.attname) AS pixel_types,
_raster_constraint_info_nodata_values(n.nspname, c.relname, a.attname) AS nodata_values,
_raster_constraint_info_out_db(n.nspname, c.relname, a.attname) AS out_db,
_raster_constraint_info_extent(n.nspname, c.relname, a.attname) AS extent,
a.attname AS r_column
FROM
pg_class c,
pg_attribute a,
pg_type t,
pg_namespace n
WHERE t.typname = 'raster'::name
AND a.attisdropped = false
AND a.atttypid = t.oid
AND a.attrelid = c.oid
AND c.relnamespace = n.oid
AND (c.relkind = 'r'::"char" OR c.relkind = 'v'::"char")
AND NOT pg_is_other_temp_schema(c.relnamespace);
CREATE OR REPLACE VIEW raster_overviews AS
SELECT
current_database() AS o_table_catalog,
n.nspname AS o_table_schema,
c.relname AS o_table_name,
a.attname AS o_raster_column,
current_database() AS r_table_catalog,
split_part(split_part(s.consrc, '''::name', 1), '''', 2)::name AS r_table_schema,
split_part(split_part(s.consrc, '''::name', 2), '''', 2)::name AS r_table_name,
split_part(split_part(s.consrc, '''::name', 3), '''', 2)::name AS r_raster_column,
trim(both from split_part(s.consrc, ',', 2))::integer AS overview_factor,
a.attname AS o_column,
split_part(split_part(s.consrc, '''::name', 3), '''', 2)::name AS r_column,
rc.out_db AS out_db
FROM
pg_class c,
pg_attribute a,
pg_type t,
pg_namespace n,
pg_constraint s,
raster_columns rc
WHERE t.typname = 'raster'::name
AND a.attisdropped = false
AND a.atttypid = t.oid
AND a.attrelid = c.oid
AND c.relnamespace = n.oid
AND (c.relkind = 'r'::"char" OR c.relkind = 'v'::"char")
AND s.connamespace = n.oid
AND s.conrelid = c.oid
AND n.nspname = rc.r_table_schema
AND c.relname = rc.r_table_name
AND a.attname = rc.r_raster_column
AND s.consrc LIKE '%_overview_constraint(%'
AND NOT pg_is_other_temp_schema(c.relnamespace);
--
-- Add rules to catch INSERT, UPDATE and DELETE
--
CREATE OR REPLACE RULE raster_columns_insert AS
ON INSERT TO raster_columns
DO INSTEAD NOTHING;
CREATE OR REPLACE RULE raster_columns_update AS
ON UPDATE TO raster_columns
DO INSTEAD NOTHING;
CREATE OR REPLACE RULE raster_columns_delete AS
ON DELETE TO raster_columns
DO INSTEAD NOTHING;
CREATE OR REPLACE RULE raster_overviews_insert AS
ON INSERT TO raster_overviews
DO INSTEAD NOTHING;
CREATE OR REPLACE RULE raster_overviews_update AS
ON UPDATE TO raster_overviews
DO INSTEAD NOTHING;
CREATE OR REPLACE RULE raster_overviews_delete AS
ON DELETE TO raster_overviews
DO INSTEAD NOTHING;