From 09343166ac213e5fcbd3eb5b21d44606b56afa62 Mon Sep 17 00:00:00 2001
From: Miles Georgi <azimux@gmail.com>
Date: Sun, 17 Aug 2008 23:45:25 -0700
Subject: [PATCH] PostgreSQL: fix transaction bug that can occur if you call
 change_column with invalid parameters

[#861 state:resolved]
---
 .../active_record/connection_adapters/postgresql_adapter.rb    | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 856435517a..74da0d9c85 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -761,7 +761,8 @@ module ActiveRecord
 
         begin
           execute "ALTER TABLE #{quoted_table_name} ALTER COLUMN #{quote_column_name(column_name)} TYPE #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
-        rescue ActiveRecord::StatementInvalid
+        rescue ActiveRecord::StatementInvalid => e
+          raise e if postgresql_version > 80000
           # This is PostgreSQL 7.x, so we have to use a more arcane way of doing it.
           begin
             begin_db_transaction