From 8974e4dae8e47e156c1993a50972fd93441afdfc Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 24 Oct 2011 16:24:23 +0200
Subject: Add comment

---
 odb/schema-catalog.cxx | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'odb/schema-catalog.cxx')

diff --git a/odb/schema-catalog.cxx b/odb/schema-catalog.cxx
index ab83dbd..87d8b90 100644
--- a/odb/schema-catalog.cxx
+++ b/odb/schema-catalog.cxx
@@ -14,6 +14,11 @@ using namespace std;
 
 namespace odb
 {
+  // It is important we use vector to store the list of create
+  // functions since schema generators for some databases may
+  // rely on the DDL statements executing in a specific order,
+  // for example, for foreign key generation.
+  //
   typedef bool (*create_function) (database&, unsigned short pass, bool drop);
   typedef vector<create_function> create_functions;
   struct schema_catalog_impl: map<string, create_functions> {};
-- 
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