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Slight optimization of gridded clustering

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This commit is contained in:
Javier Goizueta 2015-12-22 15:25:21 +01:00
parent 564ab75d2d
commit c8a1ef6f68
1 changed files with 2 additions and 2 deletions
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4
scripts-available/CDB_Overviews.sql
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@ -193,14 +193,14 @@ AS $$
aggr_attributes := ''; aggr_attributes := '';
EXECUTE Format('DROP TABLE IF EXISTS %s CASCADE;', overview_rel); EXECUTE Format('DROP TABLE IF EXISTS %s CASCADE;', overview_rel);
EXECUTE Format(' EXECUTE Format('
CREATE TABLE %3$s AS CREATE TABLE %3$s AS
WITH clusters AS ( WITH clusters AS (
SELECT SELECT
first_value(f.cartodb_id) OVER ( first_value(f.cartodb_id) OVER (
PARTITION BY PARTITION BY
ST_SnapToGrid(f.the_geom_webmercator, 0, 0, %2$s, %2$s) Floor(ST_X(f.the_geom_webmercator)/%2$s)::int,
Floor(ST_Y(f.the_geom_webmercator)/%2$s)::int
) AS cartodb_id, ) AS cartodb_id,
%4$s %4$s
the_geom, the_geom,