cerxes/openmaptiles
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

CTEs always materialise so inline the union zoom level views ⚠️

Browse Source
This commit is contained in:
lukasmartinelli
2016-10-08 21:27:28 +02:00
parent d53ca84a36
commit 63985fca1e
9 changed files with 52 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
schema/layers/place.sql
View File

@@ -54,37 +54,7 @@ CREATE OR REPLACE VIEW place_z13 AS (
CREATE OR REPLACE FUNCTION layer_place(bbox geometry, zoom_level int, pixel_width numeric)
RETURNS TABLE(geom geometry, name text, class text, rank text, scalerank int) AS $$
WITH zoom_levels AS (
SELECT * FROM place_z2
WHERE zoom_level = 2
UNION ALL
SELECT * FROM place_z3
WHERE zoom_level = 3
UNION ALL
SELECT * FROM place_z4
WHERE zoom_level = 4
UNION ALL
SELECT * FROM place_z5
WHERE zoom_level = 5
UNION ALL
SELECT * FROM place_z6
WHERE zoom_level = 6
UNION ALL
SELECT * FROM place_z7
WHERE zoom_level = 7
UNION ALL
SELECT * FROM place_z8
WHERE zoom_level BETWEEN 8 AND 9
UNION ALL
SELECT * FROM place_z10
WHERE zoom_level = 10
UNION ALL
SELECT * FROM place_z11
WHERE zoom_level BETWEEN 11 AND 12
UNION ALL
SELECT * FROM place_z13
WHERE zoom_level >= 13
), ranked_places AS (
SELECT geom, name, class, rank::text, scalerank FROM (
SELECT geom, name, class, rank, scalerank,
row_number() OVER (
PARTITION BY LabelGrid(geom, 150 * pixel_width)
@@ -98,10 +68,39 @@ RETURNS TABLE(geom geometry, name text, class text, rank text, scalerank int) AS
population DESC NULLS LAST,
length(name) DESC
) AS gridrank
FROM zoom_levels
FROM (
SELECT * FROM place_z2
WHERE zoom_level = 2
UNION ALL
SELECT * FROM place_z3
WHERE zoom_level = 3
UNION ALL
SELECT * FROM place_z4
WHERE zoom_level = 4
UNION ALL
SELECT * FROM place_z5
WHERE zoom_level = 5
UNION ALL
SELECT * FROM place_z6
WHERE zoom_level = 6
UNION ALL
SELECT * FROM place_z7
WHERE zoom_level = 7
UNION ALL
SELECT * FROM place_z8
WHERE zoom_level BETWEEN 8 AND 9
UNION ALL
SELECT * FROM place_z10
WHERE zoom_level = 10
UNION ALL
SELECT * FROM place_z11
WHERE zoom_level BETWEEN 11 AND 12
UNION ALL
SELECT * FROM place_z13
WHERE zoom_level >= 13
) AS zoom_levels
WHERE geom && bbox
)
SELECT geom, name, class, rank::text, scalerank FROM ranked_places
) AS ranked_places
WHERE
zoom_level <= 7 OR
(zoom_level = 8 AND gridrank <= 4) OR