SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 6)
    Function median (alias ma) (children 1)
     ExpressionList (children 1)
      Identifier a
    Function median (alias mb) (children 1)
     ExpressionList (children 1)
      Identifier b
    Function median (alias mc) (children 1)
     ExpressionList (children 1)
      Identifier c
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier ma
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier mb
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier mc
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier decimal