42 lines
1.6 KiB
PL/PgSQL
42 lines
1.6 KiB
PL/PgSQL
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-- etldoc: ne_global_roads_sql [label="ne_global_roads.sql", shape=note ]
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-- etldoc: function_ne_highway[label="FUNCTION ne_highway"]
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-- etldoc: ne_global_roads_sql -> function_ne_highway
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-- etldoc: function_ne_highway -> postgreSQL
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CREATE OR REPLACE FUNCTION ne_highway(type VARCHAR) RETURNS VARCHAR AS $$
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SELECT CASE type
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WHEN 'Major Highway' THEN 'motorway'
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WHEN 'Secondary Highway' THEN 'trunk'
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WHEN 'Road' THEN 'primary'
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ELSE type
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END;
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$$ LANGUAGE SQL IMMUTABLE;
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-- etldoc: natural_earth [fillcolor=lightblue, style="rounded,filled", shape=box , label="Natural Earth" ];
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-- etldoc: natural_earth -> ne_10m_roads
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-- etldoc: natural_earth -> ne_10m_roads_north_america
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-- etldoc: ne_global_roads_sql -> ne_10m_global_roads ;
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CREATE TABLE IF NOT EXISTS ne_10m_global_roads AS (
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-- etldoc: ne_10m_roads -> ne_10m_global_roads
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SELECT geom AS geometry, scalerank, ne_highway(type) AS highway
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FROM ne_10m_roads
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WHERE continent <> 'North America'
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AND featurecla = 'Road'
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AND type IN ('Major Highway', 'Secondary Highway', 'Road')
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UNION ALL
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-- etldoc: function_ne_highway -> ne_10m_global_roads
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-- etldoc: ne_10m_roads_north_america -> ne_10m_global_roads
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SELECT geom AS geometry, scalerank, ne_highway(type) AS highway
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FROM ne_10m_roads_north_america
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WHERE type IN ('Major Highway', 'Secondary Highway', 'Road')
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);
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CREATE INDEX IF NOT EXISTS ne_10m_global_roads_geometry_idx ON ne_10m_global_roads USING gist(geometry);
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CREATE INDEX IF NOT EXISTS ne_10m_global_roads_scalerank_idx ON ne_10m_global_roads(scalerank);
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