SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 4)
    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
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_table_null_specifics
   ExpressionList (children 1)
    Identifier id
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier id
