Geografic-Information-System/lib/temporal/SQL/stds_raster_register_trigger_template.sql

--#############################################################################
-- This SQL script creates a trigger to update a space-time raster dataset
-- metadata
--
-- Author: Soeren Gebbert soerengebbert <at> googlemail <dot> com
--#############################################################################

-- SPACETIME_NAME is a placeholder for specific stds name (SQL compliant): name_mapset
-- SPACETIME_ID is a placeholder for specific stds id: name@mapset

--PRAGMA foreign_keys = ON;

-- Triggers are disabled due to huge performance issues
--CREATE TRIGGER SPACETIME_NAME_raster_metadata_register_insert_trigger AFTER INSERT ON SPACETIME_NAME_raster_register 
--  BEGIN
--    -- Update the min and max values
--    UPDATE strds_metadata SET min_min = 
--           (SELECT min(min) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET min_max = 
--           (SELECT max(min) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET max_min = 
--           (SELECT min(max) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET max_max = 
--           (SELECT max(max) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    -- Update the resolution
--    UPDATE strds_metadata SET nsres_min = 
--           (SELECT min(nsres) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET nsres_max = 
--           (SELECT max(nsres) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET ewres_min = 
--           (SELECT min(ewres) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET ewres_max = 
--           (SELECT max(ewres) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--  END;
--
--CREATE TRIGGER SPACETIME_NAME_raster_metadata_register_delete_trigger AFTER DELETE ON SPACETIME_NAME_raster_register 
--  BEGIN
--    -- Update the min and max values
--    UPDATE strds_metadata SET min_min = 
--           (SELECT min(min) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET min_max = 
--           (SELECT max(min) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET max_min = 
--           (SELECT min(max) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET max_max = 
--           (SELECT max(max) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    -- Update the resolution
--    UPDATE strds_metadata SET nsres_min = 
--           (SELECT min(nsres) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET nsres_max = 
--           (SELECT max(nsres) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET ewres_min = 
--           (SELECT min(ewres) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--    UPDATE strds_metadata SET ewres_max = 
--           (SELECT max(ewres) FROM raster_metadata WHERE raster_metadata.id IN 
--			(SELECT id FROM SPACETIME_NAME_raster_register)
--           ) WHERE id = 'SPACETIME_ID';
--  END;
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