51 lines
2.1 KiB
PL/PgSQL
51 lines
2.1 KiB
PL/PgSQL
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-- etldoc: layer_highway_name[shape=record fillcolor=lightpink, style="rounded,filled",
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-- etldoc: label="layer_highway_name | <z8> z8 |<z9> z9 |<z10> z10 |<z11> z11 |<z12> z12|<z13> z13|<z14_> z14_" ] ;
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CREATE OR REPLACE FUNCTION layer_highway_name(bbox geometry, zoom_level integer)
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RETURNS TABLE(osm_id bigint, geometry geometry, name text, ref text, ref_length int, class highway_class, subclass text) AS $$
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SELECT osm_id, geometry, name,
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NULLIF(ref, ''), NULLIF(LENGTH(ref), 0) AS ref_length,
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to_highway_class(highway) AS class, highway AS subclass
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FROM (
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-- etldoc: osm_highway_name_linestring_gen3 -> layer_highway_name:z8
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SELECT * FROM osm_highway_name_linestring_gen3
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WHERE zoom_level = 8
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UNION ALL
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-- etldoc: osm_highway_name_linestring_gen2 -> layer_highway_name:z9
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SELECT * FROM osm_highway_name_linestring_gen2
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WHERE zoom_level = 9
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UNION ALL
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-- etldoc: osm_highway_name_linestring_gen1 -> layer_highway_name:z10
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-- etldoc: osm_highway_name_linestring_gen1 -> layer_highway_name:z11
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SELECT * FROM osm_highway_name_linestring_gen1
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WHERE zoom_level BETWEEN 10 AND 11
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UNION ALL
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-- etldoc: osm_highway_name_linestring -> layer_highway_name:z12
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SELECT * FROM osm_highway_name_linestring
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WHERE zoom_level = 12
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AND LineLabel(zoom_level, COALESCE(NULLIF(name, ''), ref), geometry)
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AND to_highway_class(highway) < 'minor_road'::highway_class
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AND NOT highway_is_link(highway)
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UNION ALL
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-- etldoc: osm_highway_name_linestring -> layer_highway_name:z13
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SELECT * FROM osm_highway_name_linestring
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WHERE zoom_level = 13
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AND LineLabel(zoom_level, COALESCE(NULLIF(name, ''), ref), geometry)
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AND to_highway_class(highway) < 'path'::highway_class
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UNION ALL
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-- etldoc: osm_highway_name_linestring -> layer_highway_name:z14_
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SELECT * FROM osm_highway_name_linestring
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WHERE zoom_level >= 14
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) AS zoom_levels
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WHERE geometry && bbox
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ORDER BY z_order ASC;
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$$ LANGUAGE SQL IMMUTABLE;
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