log 'default' if no transaction

lib/dialects/mysql/query.js

@@ -27,7 +27,7 @@ module.exports = (function() {
     this.sql = sql;
     this.sql = sql;
 
 
     if (this.options.logging !== false) {
     if (this.options.logging !== false) {
-      this.sequelize.log('Executing (' + this.connection.uuid + '): ' + this.sql);
+      this.sequelize.log('Executing (' + (this.connection.uuid || 'default') + '): ' + this.sql);
     }
     }
 
 
     var promise = new Utils.Promise(function(resolve, reject) {
     var promise = new Utils.Promise(function(resolve, reject) {

lib/dialects/postgres/query.js

@@ -48,7 +48,7 @@ module.exports = (function() {
       , rows = [];
       , rows = [];
 
 
     if (this.options.logging !== false) {
     if (this.options.logging !== false) {
-      this.sequelize.log('Executing (' + this.client.uuid + '): ' + this.sql);
+      this.sequelize.log('Executing (' + (this.client.uuid || 'default') + '): ' + this.sql);
     }
     }
 
 
     return new Promise(function(resolve, reject) {
     return new Promise(function(resolve, reject) {

lib/dialects/sqlite/query.js

@@ -31,7 +31,7 @@ module.exports = (function() {
     this.sql = sql;
     this.sql = sql;
 
 
     if (this.options.logging !== false) {
     if (this.options.logging !== false) {
-      this.sequelize.log('Executing (' + this.database.uuid + '): ' + this.sql);
+      this.sequelize.log('Executing (' + (this.database.uuid || 'default') + '): ' + this.sql);
     }
     }
 
 
     return new Utils.Promise(function(resolve) {
     return new Utils.Promise(function(resolve) {