SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t_map_null
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier a
     Function map (children 1)
      ExpressionList (children 4)
       Literal \'name\'
       Literal NULL
       Literal \'\'
       Literal NULL