2b95d1cffa
* All functions that access database must be declared as `STABLE`, not `IMMUTABLE` -- because database can change at any moment, e.g. during an update * there are a few functions that could be made `STRICT` -- passing `NULL` as a parameter will always result in a `NULL`, but for some reason that causes a significant decrease in perf. * tagged one function as parallel safe NOTE: somehow `ST_AsMVT()` method of tile generation is showing 70-90% slowdown with this patch. I am not sure of why this is happening. If the reason is the `IMMUTABLE` -> `STABLE` change, we may have to dig deeper into PG optimization
44 lines
1.6 KiB
PL/PgSQL
44 lines
1.6 KiB
PL/PgSQL
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-- etldoc: layer_aerodrome_label[shape=record fillcolor=lightpink, style="rounded,filled", label="layer_aerodrome_label | <z10_> z10+" ] ;
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CREATE OR REPLACE FUNCTION layer_aerodrome_label(bbox geometry,
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zoom_level integer)
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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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class text,
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iata text,
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icao text,
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ele int,
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ele_ft int
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)
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AS
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$$
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SELECT
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-- etldoc: osm_aerodrome_label_point -> layer_aerodrome_label:z10_
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osm_id,
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geometry,
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name,
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COALESCE(NULLIF(name_en, ''), name) AS name_en,
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COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
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tags,
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CASE
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%%FIELD_MAPPING: class %%
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ELSE 'other'
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END AS class,
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NULLIF(iata, '') AS iata,
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NULLIF(icao, '') AS icao,
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substring(ele FROM E'^(-?\\d+)(\\D|$)')::int AS ele,
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round(substring(ele FROM E'^(-?\\d+)(\\D|$)')::int * 3.2808399)::int AS ele_ft
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FROM osm_aerodrome_label_point
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WHERE geometry && bbox
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AND zoom_level >= 10;
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$$ LANGUAGE SQL STABLE
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-- STRICT
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PARALLEL SAFE;
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