fix #3451: don't recheck saved primary key column for views when 'use…

… estimates' is on

git-svn-id: http://svn.osgeo.org/qgis/trunk@15107 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/providers/postgres/qgspostgresprovider.cpp

@@ -1253,9 +1253,10 @@ QString QgsPostgresProvider::getPrimaryKey()
           }
 
           // mPrimaryKeyDefault stays null and is retrieved later on demand
+          // if mUseEstimatedMetadata is on assume that the already keyfield is still unique
 
           if (( type != "int4" && type != "oid" ) ||
-              !uniqueData( mQuery, primaryKey ) )
+              ( !mUseEstimatedMetadata && !uniqueData( mQuery, primaryKey ) ) )
           {
             primaryKey = "";
           }