added some missing methods for PGconn and PGresult

lib/postgres-pr/postgres-compat.rb

@@ -29,24 +29,69 @@ def query(sql)
   end
 
   alias exec query
+
+  def self.escape(str)
+    # TODO: correct?
+    str.gsub(/\\/){ '\\\\' }.gsub(/'/){ '\\\'' }
+  end
+
 end
 
 class PGresult
-  attr_reader :fields, :result
+  include Enumerable
+
+  def each(&block)
+    @result.each(&block)
+  end
 
+  def [](index)
+    @result[index]
+  end
+
   def initialize(res)
     @res = res
     @fields = @res.fields.map {|f| f.name}
     @result = @res.rows
   end
 
-  include Enumerable
+  # TODO: status, getlength, cmdstatus
 
-  def each(&block)
-    @result.each(&block)
+  attr_reader :result, :fields
+
+  def num_tuples
+    @result.size
   end
 
-  def [](index)
-    @result[index]
+  def num_fields
+    @fields.size
+  end
+
+  def fieldname(index)
+    @fields[index]
+  end
+
+  def fieldnum(name)
+    @fields.index(name)
+  end
+
+  def type(index)
+    raise
+    # TODO: correct?
+    @res.fields[index].type_oid
+  end
+
+  def size(index)
+    raise
+    # TODO: correct?
+    @res.fields[index].typlen
+  end
+
+  def getvalue(tup_num, field_num)
+    @result[tup_num][field_num]
+  end
+
+  # free the result set
+  def clear
+    @res = @fields = @result = nil
   end
 end