60 lines
2.6 KiB
PL/PgSQL
60 lines
2.6 KiB
PL/PgSQL
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-- etldoc: types_sql[label="types.sql", shape=note ]
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DO $$
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-- etldoc: type_highway_class[label="TYPE highway_class"]
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-- etldoc: types_sql-> type_highway_class
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-- etldoc: type_highway_class -> postgreSQL
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BEGIN
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IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'highway_class') THEN
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CREATE TYPE highway_class AS ENUM ('motorway', 'major_road', 'minor_road', 'path');
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END IF;
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END
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$$;
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DO $$
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-- etldoc: type_highway_properties[label="TYPE highway_properties"]
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-- etldoc: types_sql-> type_highway_properties
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-- etldoc: type_highway_properties -> postgreSQL
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BEGIN
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IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'highway_properties') THEN
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CREATE TYPE highway_properties AS ENUM ('bridge:oneway', 'tunnel:oneway', 'ramp', 'ford', 'bridge', 'tunnel', 'oneway');
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END IF;
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END
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$$;
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-- etldoc: function_to_highway_class[label="FUNCTION to_highway_class"]
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-- etldoc: types_sql-> function_to_highway_class
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-- etldoc: function_to_highway_class -> postgreSQL
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CREATE OR REPLACE FUNCTION to_highway_class(highway TEXT) RETURNS highway_class AS $$
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SELECT CASE
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WHEN highway IN ('motorway', 'motorway_link') THEN 'motorway'::highway_class
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-- A major class is helpful in styling - one can still differentiate on a finer level using the subclass
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WHEN highway IN ('trunk', 'trunk_link',
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'primary', 'primary_link',
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'secondary', 'secondary_link',
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'tertiary', 'tertiary_link') THEN 'major_road'::highway_class
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WHEN highway IN ('unclassified', 'residential', 'living_street', 'road', 'track', 'service') THEN 'minor_road'::highway_class
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WHEN highway IN ('pedestrian', 'path', 'footway', 'cycleway', 'steps') THEN 'path'::highway_class
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ELSE NULL
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END;
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$$ LANGUAGE SQL IMMUTABLE STRICT;
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-- etldoc: function_to_highway_properties[label="FUNCTION to_highway_properties"]
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-- etldoc: types_sql-> function_to_highway_properties
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-- etldoc: function_to_highway_properties -> postgreSQL
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CREATE OR REPLACE FUNCTION to_highway_properties(is_bridge boolean, is_tunnel boolean, is_ford boolean, is_ramp boolean, is_oneway boolean) RETURNS highway_properties AS $$
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SELECT CASE
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WHEN is_bridge AND is_oneway THEN 'bridge:oneway'::highway_properties
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WHEN is_tunnel AND is_oneway THEN 'tunnel:oneway'::highway_properties
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WHEN is_ramp THEN 'ramp'::highway_properties
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WHEN is_ford THEN 'ford'::highway_properties
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WHEN is_bridge THEN 'bridge'::highway_properties
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WHEN is_tunnel THEN 'tunnel'::highway_properties
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WHEN is_oneway THEN 'oneway'::highway_properties
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ELSE NULL
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END;
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$$ LANGUAGE SQL IMMUTABLE;
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