For future reference: https://github.com/snowballstem/snowball/issues/19
On 26.05.2015 12:29, Sven R. Kunze wrote:
Thanks. It seems as if I have use snowball. So, I go ahead and post my
issue at github.
Maybe, I have difficulties to understand the relationship/dependencies
between all these 'maybe' available dictionary/parser/stemmer packages.
What happens if I install all packages for a single language?
(hunspell, myspell, ispell, snowball)
Are they complementary? Do they replace each other?
>>> \dFd
List of text search dictionaries
Schema | Name | Description
------------+-----------------+-----------------------------------------------------------
pg_catalog | danish_stem | snowball stemmer for danish language
pg_catalog | dutch_stem | snowball stemmer for dutch language
pg_catalog | english_stem | snowball stemmer for english language
pg_catalog | finnish_stem | snowball stemmer for finnish language
pg_catalog | french_stem | snowball stemmer for french language
pg_catalog | german_stem | snowball stemmer for german language
pg_catalog | hungarian_stem | snowball stemmer for hungarian language
pg_catalog | italian_stem | snowball stemmer for italian language
pg_catalog | norwegian_stem | snowball stemmer for norwegian language
pg_catalog | portuguese_stem | snowball stemmer for portuguese language
pg_catalog | romanian_stem | snowball stemmer for romanian language
pg_catalog | russian_stem | snowball stemmer for russian language
pg_catalog | simple | simple dictionary: just lower case and
check for stopword
pg_catalog | spanish_stem | snowball stemmer for spanish language
pg_catalog | swedish_stem | snowball stemmer for swedish language
pg_catalog | turkish_stem | snowball stemmer for turkish language
(16 rows)
On 26.05.2015 12:09, Albe Laurenz wrote:
Sven R. Kunze wrote:
However, are you sure, I am using snowball? Maybe, I am reading the
documenation wrong:
test=> SELECT * FROM ts_debug('german', 'system');
alias | description | token | dictionaries | dictionary
| lexemes
-----------+-----------------+--------+---------------+-------------+---------
asciiword | Word, all ASCII | system | {german_stem} | german_stem
| {syst}
(1 row)
test=> \dFd german_stem
List of text search dictionaries
Schema | Name | Description
------------+-------------+--------------------------------------
pg_catalog | german_stem | snowball stemmer for german language
(1 row)
http://www.postgresql.org/docs/9.3/static/textsearch-dictionaries.html
but it seems as it depends on which packages (ispell, hunspell,
myspell,
snowball + corresponding languages) my system has installed.
Is there an easy way to determine which of these packages PostgreSQL
uses AND what for?
If you use a standard PostgreSQL distribution, you will have no ispell
dictionary (as the documentation you quote says).
You can always list all dictionaries with "\dFd" in psql.
Sure. That might be the problem. It occurs to me that stems (if
detected
as such) should be left alone.
In case a stem is real German word, it should be stemmed to itself
anyway
If not, it might help not to stem in order to avoid errors.
Yes, but that would mean that you have a way to determine from a string
whether it is a word or a stem or both, and the software does not do
that.
Yours,
Laurenz Albe
Regards,
--
Sven R. Kunze
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e-mail: srkunze@xxxxxxxxxxxx
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