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Manage field mapping in SQL declaratively

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Simplify some of the OSM->OMT field value mappings using declarative syntax.

This approach is not for all cases, but in many it removes
the need of storing the same field in both the .yaml and .sql files.

TODO: support more complex AND/OR cases
This commit is contained in:
Yuri Astrakhan
2019-10-26 04:28:51 -04:00
parent f3667170f6
commit 1614a4656c
10 changed files with 156 additions and 120 deletions
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37
layers/poi/class.sql
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@@ -30,39 +30,10 @@ $$ LANGUAGE SQL IMMUTABLE;
CREATE OR REPLACE FUNCTION poi_class(subclass TEXT, mapping_key TEXT)
RETURNS TEXT AS $$
SELECT CASE
WHEN subclass IN ('accessories','antiques','beauty','bed','boutique','camera','carpet','charity','chemist','coffee','computer','convenience','copyshop','cosmetics','garden_centre','doityourself','erotic','electronics','fabric','florist','frozen_food','furniture','video_games','video','general','gift','hardware','hearing_aids','hifi','ice_cream','interior_decoration','jewelry','kiosk','lamps','mall','massage','motorcycle','mobile_phone','newsagent','optician','outdoor','perfumery','perfume','pet','photo','second_hand','shoes','sports','stationery','tailor','tattoo','ticket','tobacco','toys','travel_agency','watches','weapons','wholesale') THEN 'shop'
WHEN subclass IN ('townhall','public_building','courthouse','community_centre') THEN 'town_hall'
WHEN subclass IN ('golf','golf_course','miniature_golf') THEN 'golf'
WHEN subclass IN ('fast_food','food_court') THEN 'fast_food'
WHEN subclass IN ('park','bbq') THEN 'park'
WHEN subclass IN ('bus_stop','bus_station') THEN 'bus'
WHEN (subclass='station' AND mapping_key = 'railway') OR subclass IN ('halt', 'tram_stop', 'subway') THEN 'railway'
WHEN (subclass='station' AND mapping_key = 'aerialway') THEN 'aerialway'
WHEN subclass IN ('subway_entrance','train_station_entrance') THEN 'entrance'
WHEN subclass IN ('camp_site','caravan_site') THEN 'campsite'
WHEN subclass IN ('laundry','dry_cleaning') THEN 'laundry'
WHEN subclass IN ('supermarket','deli','delicatessen','department_store','greengrocer','marketplace') THEN 'grocery'
WHEN subclass IN ('books','library') THEN 'library'
WHEN subclass IN ('university','college') THEN 'college'
WHEN subclass IN ('hotel','motel','bed_and_breakfast','guest_house','hostel','chalet','alpine_hut','dormitory') THEN 'lodging'
WHEN subclass IN ('chocolate','confectionery') THEN 'ice_cream'
WHEN subclass IN ('post_box','post_office') THEN 'post'
WHEN subclass IN ('cafe') THEN 'cafe'
WHEN subclass IN ('school','kindergarten') THEN 'school'
WHEN subclass IN ('alcohol','beverages','wine') THEN 'alcohol_shop'
WHEN subclass IN ('bar','nightclub') THEN 'bar'
WHEN subclass IN ('marina','dock') THEN 'harbor'
WHEN subclass IN ('car','car_repair','taxi') THEN 'car'
WHEN subclass IN ('hospital','nursing_home', 'clinic') THEN 'hospital'
WHEN subclass IN ('grave_yard','cemetery') THEN 'cemetery'
WHEN subclass IN ('attraction','viewpoint') THEN 'attraction'
WHEN subclass IN ('biergarten','pub') THEN 'beer'
WHEN subclass IN ('music','musical_instrument') THEN 'music'
WHEN subclass IN ('american_football','stadium','soccer') THEN 'stadium'
WHEN subclass IN ('art','artwork','gallery','arts_centre') THEN 'art_gallery'
WHEN subclass IN ('bag','clothes') THEN 'clothing_store'
WHEN subclass IN ('swimming_area','swimming') THEN 'swimming'
WHEN subclass IN ('castle','ruins') THEN 'castle'
%%FIELD_MAPPING: class %%
WHEN (subclass = 'station' AND mapping_key = 'railway')
OR (subclass IN ('halt', 'tram_stop', 'subway')) THEN 'railway'
WHEN (subclass = 'station' AND mapping_key = 'aerialway') THEN 'aerialway'
ELSE subclass
END;
$$ LANGUAGE SQL IMMUTABLE;