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18 lines
571 B
PL/PgSQL
18 lines
571 B
PL/PgSQL
DROP FUNCTION IF EXISTS public.function_source;
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CREATE OR REPLACE FUNCTION public.function_source(z integer, x integer, y integer, query_params json) RETURNS bytea AS $$
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DECLARE
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bounds geometry;
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mvt bytea;
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BEGIN
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SELECT INTO bounds TileBBox(z, x, y, 3857);
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SELECT INTO mvt ST_AsMVT(tile, 'public.function_source', 4096, 'geom') FROM (
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SELECT
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ST_AsMVTGeom(geom, bounds, 4096, 64, true) AS geom
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FROM public.table_source
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WHERE geom && bounds
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) as tile WHERE geom IS NOT NULL;
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RETURN mvt;
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END
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$$ LANGUAGE plpgsql IMMUTABLE STRICT PARALLEL SAFE; |