Re: Postgres regexp matching failure?
| От | Aaron Bono |
|---|---|
| Тема | Re: Postgres regexp matching failure? |
| Дата | |
| Msg-id | bf05e51c0609050910k226fe36frbbfbe14db34a6b9d@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Postgres regexp matching failure? (Alvaro Herrera <alvherre@commandprompt.com>) |
| Список | pgsql-sql |
On 9/5/06, Alvaro Herrera <alvherre@commandprompt.com> wrote:
More specifically, Perl, Java and Python interpret \b as a backspace in the Character class only (got that from the Regular Expression pocket reference) but otherwise are word boundries. I am not entirely sure what the Character class context is referring to but it does show that \b is interpreted differently under different contexts. PostgreSQL may not have a way (or at least a very good way) to make this distinction.
Any other thoughts?
==================================================================
Aaron Bono
Aranya Software Technologies, Inc.
http://www.aranya.com
http://codeelixir.com
==================================================================
In Perl at least, \b is a word boundary. In PostgreSQL (and probably
Tcl as well) it's a backslash AFAICT.
More specifically, Perl, Java and Python interpret \b as a backspace in the Character class only (got that from the Regular Expression pocket reference) but otherwise are word boundries. I am not entirely sure what the Character class context is referring to but it does show that \b is interpreted differently under different contexts. PostgreSQL may not have a way (or at least a very good way) to make this distinction.
Any other thoughts?
==================================================================
Aaron Bono
Aranya Software Technologies, Inc.
http://www.aranya.com
http://codeelixir.com
==================================================================
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