ACTIVERECORD_JDBC-143: Implement table_exists? fixing association tab…

…le names with schema prefixes

lib/arjdbc/jdbc/adapter.rb

@@ -225,7 +225,6 @@ def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil)
         id_value || id
       end
 
-
       def jdbc_columns(table_name, name = nil)
         @connection.columns(table_name.to_s)
       end
@@ -235,6 +234,10 @@ def tables(name = nil)
         @connection.tables
       end
 
+      def table_exists?(name)
+        jdbc_columns(name) rescue nil
+      end
+
       def indexes(table_name, name = nil, schema_name = nil)
         @connection.indexes(table_name, name, schema_name)
       end

test/mysql_simple_test.rb

@@ -29,6 +29,19 @@ def test_table_name_quoting_with_dot
   def test_update_all_with_limit
     assert_nothing_raised { Entry.update_all({:title => "test"}, {}, {:limit => 1}) }
   end
+
+  def test_find_in_other_schema_with_include
+    old_entries_table_name = Entry.table_name
+    old_users_table_name   = User.table_name
+    begin
+      User.set_table_name 'weblog_development.users'
+      Entry.set_table_name 'weblog_development.entries'
+      assert !Entry.all(:include => :user).empty?
+    ensure
+      Entry.set_table_name old_entries_table_name
+      User.set_table_name old_users_table_name
+    end
+  end
 end
 
 class MysqlHasManyThroughTest < Test::Unit::TestCase