SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Function length (children 1)
     ExpressionList (children 1)
      Identifier nest.a
    Function length (children 1)
     ExpressionList (children 1)
      Identifier nest.b
    Function length (children 1)
     ExpressionList (children 1)
      Identifier nest.c
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier decimal
