Thread: [HACKERS] Allowing dash character in LTREE

[HACKERS] Allowing dash character in LTREE

From
Cyril Auburtin
Date:
It could be useful to allow the `-` char in allowed LTREE label characters  (currently a-zA-Z0-9_ https://www.postgresql.org/docs/9.6/static/ltree.html)

The reason is to allow to use more easily base64 ids, (like https://github.com/dylang/shortid, ...), uuid's too in labels

`-` is also not used as a query operator as a plus


Re: [HACKERS] Allowing dash character in LTREE

From
"David G. Johnston"
Date:
On Sat, May 20, 2017 at 1:27 AM, Cyril Auburtin <cyril.auburtin@gmail.com> wrote:
It could be useful to allow the `-` char in allowed LTREE label characters  (currently a-zA-Z0-9_ https://www.postgresql.org/docs/9.6/static/ltree.html)

The reason is to allow to use more easily base64 ids, (like https://github.com/dylang/shortid, ...), uuid's too in labels

`-` is also not used as a query operator as a plus



​This is the third time you've posted this suggestion.  Its been seen by the people you are sending it to.

I don't follow how this helps for UUID - they are not usually generated hierarchically​...

I'll +1 the thought, but I won't be providing a patch.

David J.

Re: [HACKERS] Allowing dash character in LTREE

From
Cyril Auburtin
Date:
Ah sorry, first time, I thought it didn't pass

It's to support multiple ids (base64 ones are frequent) (or uuid's) in a path. I think it's more practical than an array, for searching and sorting

But I understand that LTREE's main purpose is probably more for words 'breadcrumbs' etc.. 

2017-05-20 18:31 GMT+02:00 David G. Johnston <david.g.johnston@gmail.com>:
On Sat, May 20, 2017 at 1:27 AM, Cyril Auburtin <cyril.auburtin@gmail.com> wrote:
It could be useful to allow the `-` char in allowed LTREE label characters  (currently a-zA-Z0-9_ https://www.postgresql.org/docs/9.6/static/ltree.html)

The reason is to allow to use more easily base64 ids, (like https://github.com/dylang/shortid, ...), uuid's too in labels

`-` is also not used as a query operator as a plus



​This is the third time you've posted this suggestion.  Its been seen by the people you are sending it to.

I don't follow how this helps for UUID - they are not usually generated hierarchically​...

I'll +1 the thought, but I won't be providing a patch.

David J.


Re: [HACKERS] Allowing dash character in LTREE

From
"David G. Johnston"
Date:
On Sat, May 20, 2017 at 11:26 AM, Cyril Auburtin <cyril.auburtin@gmail.com> wrote:
Ah sorry, first time, I thought it didn't pass

​You should check our excellent online mailing list archives before re-sending.


David J.

Re: [HACKERS] Allowing dash character in LTREE

From
Manuel Kniep
Date:




Manuel Kniep
Danziger Str. 116
10405 Berlin
Am 20.05.2017 um 10:27 schrieb Cyril Auburtin <cyril.auburtin@gmail.com>:

It could be useful to allow the `-` char in allowed LTREE label characters  (currently a-zA-Z0-9_ https://https://github.com/adjust/ltreewww.postgresql.org/docs/9.6/static/ltree.html)

There is a patched version here

Which allows almost any char but uses '::' as label separator my it's an inspiration to do your own patch. 

Manuel 


Re: [HACKERS] Allowing dash character in LTREE

From
Cyril Auburtin
Date:
interesting, but I like '.' as path separator, it's url-friendly, and easy

I used some simple `path        TEXT CHECK (path ~ '^[\w.-]+$')` but now I regret it, because it's not as easy to index and optimize requests

2017-05-21 11:28 GMT+02:00 Manuel Kniep <rapimo@adeven.com>:




Manuel Kniep
Danziger Str. 116
10405 Berlin
Am 20.05.2017 um 10:27 schrieb Cyril Auburtin <cyril.auburtin@gmail.com>:

It could be useful to allow the `-` char in allowed LTREE label characters  (currently a-zA-Z0-9_ https://https://github.com/adjust/ltreewww.postgresql.org/docs/9.6/static/ltree.html)

There is a patched version here

Which allows almost any char but uses '::' as label separator my it's an inspiration to do your own patch. 

Manuel