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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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18
layers/highway/ne_global_roads.sql
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@@ -1,3 +1,10 @@
-- etldoc: ne_global_roads_sql [label="ne_global_roads.sql", shape=note ]
-- etldoc: function_ne_highway[label="FUNCTION ne_highway"]
-- etldoc: ne_global_roads_sql -> function_ne_highway
-- etldoc: function_ne_highway -> postgreSQL
CREATE OR REPLACE FUNCTION ne_highway(type VARCHAR) RETURNS VARCHAR AS $$
SELECT CASE type
WHEN 'Major Highway' THEN 'motorway'
@@ -7,13 +14,24 @@ CREATE OR REPLACE FUNCTION ne_highway(type VARCHAR) RETURNS VARCHAR AS $$
END;
$$ LANGUAGE SQL IMMUTABLE;
-- etldoc: natural_earth [fillcolor=lightblue, style="rounded,filled", shape=box , label="Natural Earth" ];
-- etldoc: natural_earth -> ne_10m_roads
-- etldoc: natural_earth -> ne_10m_roads_north_america
-- etldoc: ne_global_roads_sql -> ne_10m_global_roads ;
CREATE TABLE IF NOT EXISTS ne_10m_global_roads AS (
-- etldoc: ne_10m_roads -> ne_10m_global_roads
SELECT geom AS geometry, scalerank, ne_highway(type) AS highway
FROM ne_10m_roads
WHERE continent <> 'North America'
AND featurecla = 'Road'
AND type IN ('Major Highway', 'Secondary Highway', 'Road')
UNION ALL
-- etldoc: function_ne_highway -> ne_10m_global_roads
-- etldoc: ne_10m_roads_north_america -> ne_10m_global_roads
SELECT geom AS geometry, scalerank, ne_highway(type) AS highway
FROM ne_10m_roads_north_america
WHERE type IN ('Major Highway', 'Secondary Highway', 'Road')