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CDB_TransformToWebmercator: Yet another hack over a function that shouldn't exist

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This commit is contained in:
Raul Marin 2019-01-02 19:33:28 +01:00
parent 9a3ac908a9
commit 6c57751579
1 changed files with 7 additions and 3 deletions
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10
scripts-available/CDB_TransformToWebmercator.sql
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@ -31,13 +31,17 @@ BEGIN
-- Then we transform to WGS84 latlon, which is -- Then we transform to WGS84 latlon, which is
-- where we have known coordinates for the clipping -- where we have known coordinates for the clipping
-- --
latlon_input := ST_Transform(geom, 4326); latlon_input := ST_Transform(geom, 4326);
-- Don't bother clipping if the geometry boundary doesn't -- Don't bother clipping if the geometry boundary doesn't
-- go outside the valid extent. -- go outside the valid extent.
IF latlon_input @ valid_extent THEN IF latlon_input @ valid_extent THEN
RETURN ST_Transform(latlon_input, 3857); BEGIN
RETURN ST_Transform(latlon_input, 3857);
EXCEPTION WHEN OTHERS THEN
RETURN NULL;
END;
END IF; END IF;
-- Since we're going to use ST_Intersection on input -- Since we're going to use ST_Intersection on input
@ -65,7 +69,7 @@ BEGIN
-- We transform to web mercator -- We transform to web mercator
to_webmercator := ST_Transform(clipped_input, 3857); to_webmercator := ST_Transform(clipped_input, 3857);
-- Finally we convert EMPTY to NULL -- Finally we convert EMPTY to NULL
-- See https://github.com/Vizzuality/cartodb/issues/706 -- See https://github.com/Vizzuality/cartodb/issues/706
-- And retain "multi" status -- And retain "multi" status
ret := CASE WHEN ST_IsEmpty(to_webmercator) THEN NULL::geometry ret := CASE WHEN ST_IsEmpty(to_webmercator) THEN NULL::geometry