From: Regina Obe <lr@pcorp.us>
Date: Tue, 22 Aug 2017 14:43:42 +0000 (+0000)
Subject: update to use more efficient lateral syntax
X-Git-Tag: 2.4.0beta1~44
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6e9ef12ac22c0dcf0357ae6242ece651de3679f4;p=postgis

update to use more efficient lateral syntax

git-svn-id: http://svn.osgeo.org/postgis/trunk@15567 b70326c6-7e19-0410-871a-916f4a2858ee
---

diff --git a/doc/reference_raster.xml b/doc/reference_raster.xml
index 4d49c2544..92fbb9961 100644
--- a/doc/reference_raster.xml
+++ b/doc/reference_raster.xml
@@ -2000,7 +2000,7 @@ WHERE rid=35;
                     <para>Create 16 tiles in a 4x4 grid to cover the WGS84 area from upper left corner (22, 77) to lower right corner (55, 33).</para>
                     <programlisting><![CDATA[SELECT (ST_MetaData(tile)).* FROM ST_MakeEmptyCoverage(1, 1, 4, 4, 22, 33, (55 - 22)/(4)::float, (33 - 77)/(4)::float, 0., 0., 4326) tile;
 
- upperleftx | upperlefty | width | height | scalex | scaley | skewx | skewy | srid | numbands 
+ upperleftx | upperlefty | width | height | scalex | scaley | skewx | skewy | srid | numbands
 -------------------------------------------------------------------------------------
          22 |         33 |     1 |      1 |   8.25 |    -11 |     0 |     0 | 4326 |        0
       30.25 |         33 |     1 |      1 |   8.25 |    -11 |     0 |     0 | 4326 |        0
@@ -4429,8 +4429,9 @@ SELECT ST_AsText(ST_PixelAsCentroid(rast, 1, 1)) FROM dummy_rast WHERE rid = 1;
 
 			<refsection>
 				<title>Examples</title>
-				<programlisting>
-SELECT x, y, val, ST_AsText(geom) FROM (SELECT (ST_PixelAsCentroids(rast, 1)).* FROM dummy_rast WHERE rid = 2) foo;
+				<programlisting> --LATERAL syntax requires PostgreSQL 9.3+
+SELECT x, y, val, ST_AsText(geom)
+	FROM (SELECT dp.* FROM dummy_rast, LATERAL ST_PixelAsCentroids(rast, 1) AS dp WHERE rid = 2) foo;
  x | y | val |           st_astext
 ---+---+-----+--------------------------------
  1 | 1 | 253 | POINT(3427927.775 5793243.975)
@@ -12918,11 +12919,11 @@ FROM (SELECT ST_SetRotation(rast, 0.1, 0.1) As rast
 
 			  <refsection>
 					<title>Examples</title>
-					<programlisting>
+					<programlisting> -- this syntax requires PostgreSQL 9.3+
 SELECT val, ST_AsText(geom) As geomwkt
 FROM (
-SELECT (ST_DumpAsPolygons(rast)).*
-FROM dummy_rast
+SELECT dp.*
+FROM dummy_rast, LATERAL ST_DumpAsPolygons(rast) AS dp
 WHERE rid = 2
 ) As foo
 WHERE val BETWEEN 249 and 251