From f512e87ffd0ed7297520bf63830c1fc5c37d7ee9 Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@keybit.net>
Date: Tue, 3 Mar 2015 17:34:48 +0100
Subject: [PATCH] Detect number of dimensions for tables with unconstrained
 type

Fixes #9748
---
 src/providers/postgres/qgspostgresconn.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/providers/postgres/qgspostgresconn.cpp b/src/providers/postgres/qgspostgresconn.cpp
index 5e11bf275d1..9dc18805a5b 100644
--- a/src/providers/postgres/qgspostgresconn.cpp
+++ b/src/providers/postgres/qgspostgresconn.cpp
@@ -1298,6 +1298,12 @@ void QgsPostgresConn::retrieveLayerTypes( QgsPostgresLayerProperty &layerPropert
       query += QString::number( srid );
     }
 
+    query += ",";
+    query += QString( "%1(%2%3)" )
+             .arg( majorVersion() < 2 ? "ndims" : "st_ndims" )
+             .arg( quotedIdentifier( layerProperty.geometryColName ) )
+             .arg( layerProperty.geometryColType == sctGeography ? "::geometry" : "" );
+
     query += " FROM " + table;
 
     //QgsDebugMsg( "Retrieving geometry types: " + query );
@@ -1310,6 +1316,10 @@ void QgsPostgresConn::retrieveLayerTypes( QgsPostgresLayerProperty &layerPropert
       {
         QString type = gresult.PQgetvalue( i, 0 );
         QString srid = gresult.PQgetvalue( i, 1 );
+        QString ndims = gresult.PQgetvalue( i, 2 );
+
+        if ( ndims.toInt() > 2 ) layerProperty.force2d = true;
+
         if ( type.isEmpty() )
           continue;