Fix(#4953) : Return null until MySQL implements EMPTY keyword for WKT

lib/dialects/mysql/data-types.js

@@ -61,7 +61,9 @@ module.exports = function (BaseTypes) {
 
   GEOMETRY.parse = GEOMETRY.prototype.parse = function(value) {
     value = value.buffer();
-    if (value === null) {
+
+    //MySQL doesn't support POINT EMPTY, https://dev.mysql.com/worklog/task/?id=2381
+    if(value === null){
       return null;
     }
 

test/integration/data-types.test.js

@@ -292,8 +292,13 @@ describe(Support.getTestDialectTeaser('DataTypes'), function() {
         //This case throw unhandled exception
         return User.findAll();
       }).then(function(users){
+        if (dialect === 'mysql') {
+          // MySQL will return NULL, becuase they lack EMPTY geometry data support.
+          expect(users[0].field).to.be.eql(null);
+        } else {
           //it contains the null GEOMETRY data
-        expect(users[0].field).to.be.null;
+          expect(users[0].field).to.be.deep.eql(point);
+        }
       });
    }
  });