Re: A parsing question
| От | David G. Johnston |
|---|---|
| Тема | Re: A parsing question |
| Дата | |
| Msg-id | CAKFQuwapwo09A+mGZMcdYii_bQEuKCbNzqtYWss+5RPTut8Nbw@mail.gmail.com обсуждение исходный текст |
| Ответ на | A parsing question (Michael Nolan <htfoot@gmail.com>) |
| Список | pgsql-general |
On Wed, Jun 3, 2020 at 3:41 PM Michael Nolan <htfoot@gmail.com> wrote:
Recently I was typing in a query in PG 10.4.What I MEANT to type was: Where xyz >= 2400What I actually typed was: Where xyz >- 2400The latter was interpreted as 'where xyz > -2400', but I'm wondering if it shouldn't have thrown an error on an unrecognized operator '>-'
From the syntax section of the documentation:
A multiple-character operator name cannot end in + or -, unless the name also contains at least one of these characters:
~ ! @ # % ^ & | ` ?
For example, @- is an allowed operator name, but *- is not. This restriction allows PostgreSQL to parse SQL-compliant queries without requiring spaces between tokens.
David J.
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