Add logging to postgres dialect

lib/dialects/postgres/query.js

-var Utils = require("../../utils")
+var Utils = require("../../utils");
 
 
 module.exports = (function() {
 module.exports = (function() {
   var Query = function(client, callee, options) {
   var Query = function(client, callee, options) {
@@ -7,10 +7,20 @@ module.exports = (function() {
     this.client = client
     this.client = client
     this.callee = callee
     this.callee = callee
     this.options = Utils._.extend({
     this.options = Utils._.extend({
-      logging: true,
+      logging: console.log,
       plain: false,
       plain: false,
       raw: false
       raw: false
     }, options || {})
     }, options || {})
+
+    if(this.options.logging === true) {
+      console.log('DEPRECATION WARNING: The logging-option should be either a function or false. Default: console.log')
+      this.options.logging = console.log
+    }
+
+    if(this.options.logging == console.log) {
+      // using just console.log will break in node < 0.6
+      this.options.logging = function(s) { console.log(s) }
+    }
   }
   }
   Utils._.extend(Query.prototype, require("../query").prototype)
   Utils._.extend(Query.prototype, require("../query").prototype)
 
 
@@ -19,6 +29,10 @@ module.exports = (function() {
 
 
     this.sql = sql
     this.sql = sql
 
 
+    if(this.options.logging !== false) {
+      this.options.logging('Executing: ' + this.sql)
+    }
+
     var results = [];
     var results = [];
     var receivedError = false;
     var receivedError = false;