From 7d2a9e95cc331252522e58bd5984534b30f3fd5d Mon Sep 17 00:00:00 2001 From: Pete Date: Tue, 28 Jun 2016 16:24:17 +0100 Subject: [PATCH] Updated OptimizeRenderingWithPostGIS (markdown) --- OptimizeRenderingWithPostGIS.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/OptimizeRenderingWithPostGIS.md b/OptimizeRenderingWithPostGIS.md index b3027aa..1aadd40 100644 --- a/OptimizeRenderingWithPostGIS.md +++ b/OptimizeRenderingWithPostGIS.md @@ -219,7 +219,7 @@ SELECT ST_XMin(ext),ST_YMin(ext),ST_XMax(ext),ST_YMax(ext) FROM (SELECT ST_Extent(geom) as ext from planet_osm_line) as tmp ``` -...which requires PostGIS to walk the entire result set of the queried table each time the DataSource is used for the first time in a rendering session. There are three parameters available for use +...which requires PostGIS to walk the entire result set of the queried table each time the DataSource is used for the first time in a rendering session. There are three parameters available for use to avoid this process: ### extent_from_subquery E.g. `true`