SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function minIf (children 1)
     ExpressionList (children 2)
      Identifier arr
      Function notEmpty (children 1)
       ExpressionList (children 1)
        Identifier arr
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier min_if