From: Bborie Park <bkpark at ucdavis.edu>
Date: Tue, 9 Apr 2013 23:45:43 +0000 (+0000)
Subject: Fix expression-based ST_MapAlgebra resulting in regression failures on some machines
X-Git-Tag: 2.1.0beta2~110
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=432696d1f6d7fbbdda9c9a199323dcda0257dcdc;p=postgis

Fix expression-based ST_MapAlgebra resulting in regression failures on some machines


git-svn-id: http://svn.osgeo.org/postgis/trunk@11277 b70326c6-7e19-0410-871a-916f4a2858ee
---

diff --git a/raster/rt_pg/rt_pg.c b/raster/rt_pg/rt_pg.c
index 762907546..b2204205d 100644
--- a/raster/rt_pg/rt_pg.c
+++ b/raster/rt_pg/rt_pg.c
@@ -15348,7 +15348,7 @@ static int rtpg_nmapalgebra_rastbandarg_process(rtpg_nmapalgebra_arg arg, ArrayT
 
 		/* see if this is a copy of an existing pgraster */
 		for (j = 0; j < i; j++) {
-			if (arg->pgraster[i] == arg->pgraster[j]) {
+			if (!arg->isempty[j] && (arg->pgraster[i] == arg->pgraster[j])) {
 				POSTGIS_RT_DEBUG(4, "raster matching existing same raster found");
 				arg->raster[i] = arg->raster[j];
 				arg->ownsdata[i] = 0;