From 5d318b49805527f0f68828f759c6f443be11dc6a Mon Sep 17 00:00:00 2001
From: Miroslav Stampar <miroslav.stampar@gmail.com>
Date: Mon, 21 Jan 2013 17:33:09 +0100
Subject: [PATCH] Fix for a ISNULL mechanism in Firebird

---
 xml/queries.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xml/queries.xml b/xml/queries.xml
index fd851c8bb..63c5983dd 100644
--- a/xml/queries.xml
+++ b/xml/queries.xml
@@ -394,7 +394,7 @@
         <limitgroupstart query="1"/>
         <limitgroupstop query="2"/>
         <limitstring query=" ROWS "/>
-        <isnull query="%s"/>
+        <isnull query="COALESCE(%s, ' ')"/>
         <order query="ORDER BY %s ASC"/>
         <comment query="--"/>
         <count query="COUNT(%s)"/>