[asterisk-dev] [Code Review] 3161: res_sorcery_astdb.c: Fix regex handling and keep simple prefix matching performance.

[wdoekes]

> On Feb. 18, 2014, 2:35 p.m., opticron wrote:
> > /trunk/res/res_sorcery_astdb.c, lines 237-243
> > <https://reviewboard.asterisk.org/r/3161/diff/2/?file=54049#file54049line237>
> >
> >     This could also be a regex character class such as \d or \s which is too complicated for prefix matching.

No, that's perl regex. Regular REG_EXTENDED doesn't do those.

See also regex(7).

"""a '\' followed by any other character(!)  (matching that character taken as an ordinary character, as if the '\' had not been present(!))"""


- wdoekes


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On Feb. 18, 2014, 1:18 a.m., rmudgett wrote:
> 
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> 
> (Updated Feb. 18, 2014, 1:18 a.m.)
> 
> 
> Review request for Asterisk Developers.
> 
> 
> Repository: Asterisk
> 
> 
> Description
> -------
> 
> The sorcery astDB wizzard does not handle regex correctly if the pattern begins with an anchor character.
> 
> This patch attempts to convert the anchored regex pattern to a prefix pattern supported by astDB for performance reasons.  If it is not able to convert the pattern it gets all astDB members of the family and then does a normal regex pattern matching on the resulting records retrieved.
> 
> 
> Diffs
> -----
> 
>   /trunk/res/res_sorcery_astdb.c 408290 
> 
> Diff: https://reviewboard.asterisk.org/r/3161/diff/
> 
> 
> Testing
> -------
> 
> Simple regex patterns that are just prefixes are converted and the astDB just fetches the matching records.  More complex patterns fallback to getting all astDB family records and searching them by regex.
> 
> 
> Thanks,
> 
> rmudgett
> 
>

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