Xapian locking errors with custom query parser

[Michal Sojka]

On Fri, 11 Mar 2011, Carl Worth wrote:
> I've finally had a chance to start looking at this.

[...]

> 1. For "new" search features (ADJ,NEAR,etc.) I do not have a strong
>    interest in compatibility with Xapian.
> 
>    I was very careful when I wrote the documentation for the notmuch
>    search syntax to only document features that I had used and tested,
>    and that I was sure I wanted. (I was already thinking forward to
>    perhaps writing a custom query parser at some point.)
> 
>    So you should really use our existing documentation as the
>    guide. Please implement and test what it says.
> 
>    Beyond that, if you want to add additional features not mentioned in
>    our documentation, then feel free to, and there's no good reason not
>    to be Xapian compatible. But I also don't think there's a strong
>    reason that we have to be compatible.

Additionally, I'd suggest to support value range queries for dates with
".." syntax. Besides that some users may relay on this syntax, I use
date searches a lot and with custom query parser I have to type
"after:yesterday", which is unnecessarily long. I wish that
"yesterday..", which is much easier to type, would do the same.
Similarly, "mon..wed" would be easier to type than "after:mon
before:wed". What do you think?

-Michal