6457419e0d
I would like to reformat all of our SQL to have a concise coding style. This makes it far easier to understand the code for a casual contributor, and lets us spot errors more easily. Most importantly, it makes it much easier to grep (search) the code because it is more likely to be in the same syntax Some key changes: * SQL keywords are always UPPERCASE, e.g. `SELECT WHEN AS END ...` * types, variables, aliases, and field names (identifiers) are always lower case * `LANGUAGE 'plpgsql'` is now `LANGUAGE plpgsql` (no quotes) * a few minor spacing/semicolon cleanups P.S. Per @TomPohys request, `TABLE` is spelled using upper case despite being a type for consistency with PG Docs. Same for `LANGUAGE SQL` vs `LANGUAGE plpgsql`.
79 lines
3.2 KiB
PL/PgSQL
79 lines
3.2 KiB
PL/PgSQL
-- etldoc: layer_city[shape=record fillcolor=lightpink, style="rounded,filled",
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-- etldoc: label="layer_city | <z2_14> z2-z14+" ] ;
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-- etldoc: osm_city_point -> layer_city:z2_14
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CREATE OR REPLACE FUNCTION layer_city(bbox geometry, zoom_level int, pixel_width numeric)
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RETURNS TABLE
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(
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osm_id bigint,
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geometry geometry,
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name text,
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name_en text,
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name_de text,
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tags hstore,
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place city_place,
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"rank" int,
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capital int
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)
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AS
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$$
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SELECT *
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FROM (
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SELECT osm_id,
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geometry,
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name,
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COALESCE(NULLIF(name_en, ''), name) AS name_en,
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COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
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tags,
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place,
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"rank",
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normalize_capital_level(capital) AS capital
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FROM osm_city_point
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WHERE geometry && bbox
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AND ((zoom_level = 2 AND "rank" = 1)
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OR (zoom_level BETWEEN 3 AND 7 AND "rank" <= zoom_level + 1)
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)
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UNION ALL
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SELECT osm_id,
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geometry,
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name,
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COALESCE(NULLIF(name_en, ''), name) AS name_en,
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COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
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tags,
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place,
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COALESCE("rank", gridrank + 10),
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normalize_capital_level(capital) AS capital
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FROM (
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SELECT osm_id,
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geometry,
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name,
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COALESCE(NULLIF(name_en, ''), name) AS name_en,
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COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
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tags,
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place,
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"rank",
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capital,
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row_number() OVER (
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PARTITION BY LabelGrid(geometry, 128 * pixel_width)
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ORDER BY "rank" ASC NULLS LAST,
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place ASC NULLS LAST,
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population DESC NULLS LAST,
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length(name) ASC
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)::int AS gridrank
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FROM osm_city_point
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WHERE geometry && bbox
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AND ((zoom_level = 7 AND place <= 'town'::city_place
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OR (zoom_level BETWEEN 8 AND 10 AND place <= 'village'::city_place)
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OR (zoom_level BETWEEN 11 AND 13 AND place <= 'suburb'::city_place)
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OR (zoom_level >= 14)
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))
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) AS ranked_places
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WHERE (zoom_level BETWEEN 7 AND 8 AND (gridrank <= 4 OR "rank" IS NOT NULL))
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OR (zoom_level = 9 AND (gridrank <= 8 OR "rank" IS NOT NULL))
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OR (zoom_level = 10 AND (gridrank <= 12 OR "rank" IS NOT NULL))
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OR (zoom_level BETWEEN 11 AND 12 AND (gridrank <= 14 OR "rank" IS NOT NULL))
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OR (zoom_level >= 13)
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) AS city_all;
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$$ LANGUAGE SQL IMMUTABLE
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PARALLEL SAFE;
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