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example graphviz based ETL graph

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This commit is contained in:
ImreSamu
2016-11-07 15:37:17 +01:00
parent 1b4b6be3fe
commit 29d33dff3c
5 changed files with 111 additions and 1 deletions
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33
layers/highway/highway.sql
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@@ -1,7 +1,19 @@
-- etldoc: highway_sql[label="highway.sql", shape=note ]
-- etldoc: function_highway_is_link[label="FUNCTION highway_is_link"]
-- etldoc: highway_sql-> function_highway_is_link
-- etldoc: function_highway_is_link -> postgreSQL
CREATE OR REPLACE FUNCTION highway_is_link(highway TEXT) RETURNS BOOLEAN AS $$
SELECT highway LIKE '%_link';
$$ LANGUAGE SQL IMMUTABLE STRICT;
-- etldoc: postgreSQL -> layer_highway
-- etldoc: highway_sql-> layer_highway
-- etldoc: layer_highway[shape=record fillcolor=lightpink, style="rounded,filled",
-- etldoc: label="<sql> layer_highway (highway.sql) |<z4z7> z4-z7 |<z8> z8 |<z9> z9 |<z10> z10 |<z11> z11 |<z12> z12|<z13> z13|<z14> z14" ] ;
CREATE OR REPLACE FUNCTION layer_highway(bbox geometry, zoom_level int)
RETURNS TABLE(osm_id bigint, geometry geometry, class highway_class, subclass text, properties highway_properties) AS $$
SELECT
@@ -9,29 +21,41 @@ RETURNS TABLE(osm_id bigint, geometry geometry, class highway_class, subclass te
to_highway_class(highway) AS class, highway AS subclass,
to_highway_properties(is_bridge, is_tunnel, is_ford, is_ramp, is_oneway) AS properties
FROM (
SELECT
-- etldoc: ne_10m_global_roads -> layer_highway:z4z7
SELECT
NULL::bigint AS osm_id, geometry, highway,
FALSE AS is_bridge, FALSE AS is_tunnel, FALSE AS is_ford, FALSE AS is_ramp, FALSE AS is_oneway,
0 AS z_order
FROM ne_10m_global_roads
WHERE zoom_level BETWEEN 4 AND 7 AND scalerank <= 1 + zoom_level
UNION ALL
-- etldoc: osm_highway_linestring_gen4 -> layer_highway:z8
SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
FROM osm_highway_linestring_gen4
WHERE zoom_level = 8
UNION ALL
-- etldoc: osm_highway_linestring_gen3 -> layer_highway:z9
SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
FROM osm_highway_linestring_gen3
WHERE zoom_level = 9
UNION ALL
-- etldoc: osm_highway_linestring_gen2 -> layer_highway:z10
SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
FROM osm_highway_linestring_gen2
WHERE zoom_level = 10
UNION ALL
-- etldoc: osm_highway_linestring_gen1 -> layer_highway:z11
SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
FROM osm_highway_linestring_gen1
WHERE zoom_level = 11
UNION ALL
-- etldoc: osm_highway_linestring -> layer_highway:z12
SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
FROM osm_highway_linestring
WHERE zoom_level = 12
@@ -39,18 +63,25 @@ RETURNS TABLE(osm_id bigint, geometry geometry, class highway_class, subclass te
AND NOT highway_is_link(highway)
AND NOT is_area
UNION ALL
-- etldoc: osm_highway_linestring -> layer_highway:z13
SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
FROM osm_highway_linestring
WHERE zoom_level = 13
AND to_highway_class(highway) < 'path'::highway_class
AND NOT is_area
UNION ALL
-- etldoc: osm_highway_linestring -> layer_highway:z14
SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
FROM osm_highway_linestring
WHERE zoom_level >= 14 AND NOT is_area
UNION ALL
-- NOTE: We limit the selection of polys because we need to be careful to net get false positives here because
-- it is possible that closed linestrings appear both as highway linestrings and as polygon
-- etldoc: osm_highway_polygon -> layer_highway:z13
-- etldoc: osm_highway_polygon -> layer_highway:z14
SELECT osm_id, geometry, highway, FALSE AS is_bridge, FALSE AS is_tunnel, FALSE AS is_ford, FALSE AS is_ramp, FALSE AS is_oneway, z_order
FROM osm_highway_polygon
-- We do not want underground pedestrian areas for now