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