use results encoding when reading column metadata

Author: Andrey Sidorov

lib/packets/column_definition.js

@@ -46,11 +46,12 @@ function ColumnDefinition (packet)
 
   packet.skip(1); //  length of the following fields (always 0x0c)
   this.characterSet = packet.readInt16();
+  this.encoding = CharsetToEncoding[this.characterSet];
 
   // TODO: use this.characterSet to get proper encoding
   // May be keep it cesu8 since MySQL meta data is actually cesu8
   // https://github.com/sidorares/node-mysql2/pull/374
-  this.name = StringParser.decode(this._buf.slice(_nameStart, _nameStart + _nameLength), 'cesu8');
+  this.name = StringParser.decode(this._buf.slice(_nameStart, _nameStart + _nameLength), this.encoding);
 
   this.columnLength = packet.readInt32();
   this.columnType = packet.readInt8();
@@ -62,7 +63,7 @@ var addString = function (name) {
   Object.defineProperty(ColumnDefinition.prototype, name, {get: function () {
     var start = this['_' + name + 'Start'];
     var end = start + this['_' + name + 'Length'];
-    return this._buf.utf8Slice(start, end);
+    return StringParser.decode(this._buf.slice(start, end), this.encoding);
   }});
 };