code: func (adapter *PostgresAdapter) TypeMapping(sqlColumnType types.SQLColumnType) (string, error) {
  	if sqlDataType, ok := pgDataTypes[sqlColumnType]; ok {
  		return sqlDataType, nil
  	}
  
  	return "", fmt.Errorf("datatype %v not recognized", sqlColumnType)
  }
docs: // TypeMapping convert generic dataTypes to database dependent dataTypes