MySQL to PostgreSQL migration

After several hours of uncertainty it seems that I have managed to migrate a MySQL Drupal to a PostgreSQL. So I want to share my experience with this group where I think could be useful.

There are several problemas to solve: table structure translation, autoincrement values / sequences, serialized data, etc.

I've tried several ways, but always I came up against some problem.

Database schema

MySQL and PostgreSQL use different data types for its columns, they define its tables in its own way, you can't use MySQl definitions.