SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 5)
    Identifier id
    Function avg (children 1)
     ExpressionList (children 1)
      Identifier value1
    Function avg (children 1)
     ExpressionList (children 1)
      Identifier value2
    Function avg (children 1)
     ExpressionList (children 1)
      Identifier value3
    Function avg (children 1)
     ExpressionList (children 1)
      Identifier value4
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_table_nullable_unsigned_values
   ExpressionList (children 1)
    Identifier id
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier id
