Re: BUG #16615: Cannot determine type of Date for "is null" expression

Поиск
Список
Период
Сортировка
От David G. Johnston
Тема Re: BUG #16615: Cannot determine type of Date for "is null" expression
Дата
Msg-id CAKFQuwaYggLSS9Q3fs6wZd7UGGQQtj3bhPazEZqmaDUAxwvSvQ@mail.gmail.com
обсуждение исходный текст
Ответ на Re: BUG #16615: Cannot determine type of Date for "is null" expression  (yuanhang <yuanhang.zheng@qq.com>)
Список pgsql-bugs
Дерево обсуждения
On Mon, Sep 14, 2020 at 12:02 AM yuanhang <yuanhang.zheng@qq.com> wrote:
2. I don’t understand why the type cannot be parsed in T_NullTest. It can be parsed when using the SQL below.

Equality is a binary operator so the unknown argument can be inferred from the known one.

Is Null is a unary operator so there is nothing available with which to infer a type.

David J.

В списке pgsql-bugs по дате отправления: