Re: Fuzzy substring searching with the pg_trgm extension

From: Artur Zakirov <a(dot)zakirov(at)postgrespro(dot)ru>
To: Teodor Sigaev <teodor(at)sigaev(dot)ru>, Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Mike Rylander <mrylander(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Fuzzy substring searching with the pg_trgm extension
Date: 2016-02-17 14:37:58
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On 12.02.2016 20:56, Teodor Sigaev wrote:
>> On Thu, Feb 11, 2016 at 9:56 AM, Teodor Sigaev <teodor(at)sigaev(dot)ru> wrote:
>>>> 1 - sml_limit to similarity_limit. sml_threshold is difficult to
>>>> write I
>>>> think,
>>>> similarity_limit is more simple.
>>> It seems to me that threshold is right word by meaning. sml_threshold
>>> is my
>>> choice.
>> Why abbreviate it like that? Nobody's going to know that "sml" stands
>> for "similarity" without consulting the documentation, and that sucks.
> Ok, I don't have an objections. I worked a lot on various similarity
> modules and sml becomes usual for me. That's why I was asking.


I attached new version of the patch. It fixes names of GUC variables and

Now the patch introduces:
1 - functions:
- word_similarity()
2 - operators:
- %> (and <%)
- <->> (and <<->)
3 - GUC variables:
- pg_trgm.similarity_threshold
- pg_trgm.word_similarity_threshold

Artur Zakirov
Postgres Professional:
Russian Postgres Company

Attachment Content-Type Size
0001-pg_trgm_guc_v3.patch text/x-patch 9.0 KB
0002-pg_trgm_word_v8.patch text/x-patch 114.8 KB

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